From 35b65bef8c92fa440a54548563b8c4776ae18371 Mon Sep 17 00:00:00 2001
From: Mark Baker <mark@lange.demon.co.uk>
Date: Sun, 20 Feb 2022 16:46:25 +0100
Subject: [PATCH] First steps toward array-enabling the information functions
 (#2608)

* First steps toward array-enabling the information functions

Also includes moving unit tests out from Functions and into a separate, dedicated Information folder

* Resolve issue with IF(), branch pruning and calculation cache (ensure that we don't convert the if condition to a bool before we've tested to see if it evaluates to an error)
More refactoring
---
 .../Calculation/Calculation.php               |  30 ++-
 src/PhpSpreadsheet/Calculation/Functions.php  |  26 +--
 .../Calculation/Information/ErrorValue.php    |  71 +++++++
 .../Calculation/Information/Value.php         | 132 ++++++------
 .../Calculation/Logical/Conditional.php       |  12 +-
 .../LookupRef/LookupRefValidations.php        |   4 +-
 .../Calculation/MathTrig/Sum.php              |   5 +-
 .../Calculation/Statistical.php               |   2 +-
 .../Distributions/StandardNormal.php          |  12 +-
 src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php  |   3 +-
 .../Functions/Information/IsBlankTest.php     |  54 +++++
 .../Functions/Information/IsErrTest.php       |  54 +++++
 .../Functions/Information/IsErrorTest.php     |  54 +++++
 .../Functions/Information/IsEvenTest.php      |  56 +++++
 .../Functions/Information/IsLogicalTest.php   |  54 +++++
 .../Functions/Information/IsNaTest.php        |  54 +++++
 .../Functions/Information/IsNonTextTest.php   |  54 +++++
 .../Functions/Information/IsNumberTest.php    |  54 +++++
 .../Functions/Information/IsOddTest.php       |  56 +++++
 .../Functions/Information/IsTextTest.php      |  54 +++++
 .../Functions/Information/NTest.php           |  32 +++
 .../Functions/Information/TypeTest.php        |  31 +++
 .../Functions/Statistical/ZTestTest.php       |  26 +++
 .../Calculation/FunctionsTest.php             | 192 ------------------
 .../{Functions => Information}/IS_BLANK.php   |   3 -
 .../{Functions => Information}/IS_ERR.php     |   3 -
 .../{Functions => Information}/IS_ERROR.php   |   3 -
 .../{Functions => Information}/IS_EVEN.php    |   3 -
 .../{Functions => Information}/IS_LOGICAL.php |   3 -
 .../{Functions => Information}/IS_NA.php      |   3 -
 .../{Functions => Information}/IS_NONTEXT.php |   3 -
 .../{Functions => Information}/IS_NUMBER.php  |   3 -
 .../{Functions => Information}/IS_ODD.php     |   3 -
 .../{Functions => Information}/IS_TEXT.php    |   3 -
 .../{Functions => Information}/N.php          |   3 -
 .../{Functions => Information}/TYPE.php       |   3 -
 36 files changed, 817 insertions(+), 341 deletions(-)
 create mode 100644 src/PhpSpreadsheet/Calculation/Information/ErrorValue.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsBlankTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrorTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsEvenTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsLogicalTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNaTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNonTextTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNumberTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsOddTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsTextTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/NTest.php
 create mode 100644 tests/PhpSpreadsheetTests/Calculation/Functions/Information/TypeTest.php
 rename tests/data/Calculation/{Functions => Information}/IS_BLANK.php (96%)
 rename tests/data/Calculation/{Functions => Information}/IS_ERR.php (95%)
 rename tests/data/Calculation/{Functions => Information}/IS_ERROR.php (95%)
 rename tests/data/Calculation/{Functions => Information}/IS_EVEN.php (96%)
 rename tests/data/Calculation/{Functions => Information}/IS_LOGICAL.php (95%)
 rename tests/data/Calculation/{Functions => Information}/IS_NA.php (95%)
 rename tests/data/Calculation/{Functions => Information}/IS_NONTEXT.php (95%)
 rename tests/data/Calculation/{Functions => Information}/IS_NUMBER.php (95%)
 rename tests/data/Calculation/{Functions => Information}/IS_ODD.php (96%)
 rename tests/data/Calculation/{Functions => Information}/IS_TEXT.php (95%)
 rename tests/data/Calculation/{Functions => Information}/N.php (98%)
 rename tests/data/Calculation/{Functions => Information}/TYPE.php (97%)

diff --git a/src/PhpSpreadsheet/Calculation/Calculation.php b/src/PhpSpreadsheet/Calculation/Calculation.php
index 81a0353b..8ba77d3b 100644
--- a/src/PhpSpreadsheet/Calculation/Calculation.php
+++ b/src/PhpSpreadsheet/Calculation/Calculation.php
@@ -4,6 +4,7 @@ namespace PhpOffice\PhpSpreadsheet\Calculation;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Engine\CyclicReferenceStack;
 use PhpOffice\PhpSpreadsheet\Calculation\Engine\Logger;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\Value;
 use PhpOffice\PhpSpreadsheet\Calculation\Token\Stack;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
@@ -1463,12 +1464,12 @@ class Calculation
         ],
         'ISERR' => [
             'category' => Category::CATEGORY_INFORMATION,
-            'functionCall' => [Information\Value::class, 'isErr'],
+            'functionCall' => [Information\ErrorValue::class, 'isErr'],
             'argumentCount' => '1',
         ],
         'ISERROR' => [
             'category' => Category::CATEGORY_INFORMATION,
-            'functionCall' => [Information\Value::class, 'isError'],
+            'functionCall' => [Information\ErrorValue::class, 'isError'],
             'argumentCount' => '1',
         ],
         'ISEVEN' => [
@@ -1490,7 +1491,7 @@ class Calculation
         ],
         'ISNA' => [
             'category' => Category::CATEGORY_INFORMATION,
-            'functionCall' => [Information\Value::class, 'isNa'],
+            'functionCall' => [Information\ErrorValue::class, 'isNa'],
             'argumentCount' => '1',
         ],
         'ISNONTEXT' => [
@@ -1765,7 +1766,7 @@ class Calculation
         ],
         'NA' => [
             'category' => Category::CATEGORY_INFORMATION,
-            'functionCall' => [Functions::class, 'NA'],
+            'functionCall' => [Information\ExcelError::class, 'NA'],
             'argumentCount' => '0',
         ],
         'NEGBINOMDIST' => [
@@ -3894,8 +3895,8 @@ class Calculation
 
         $regexpMatchString = '/^(' . self::CALCULATION_REGEXP_FUNCTION .
                                 '|' . self::CALCULATION_REGEXP_CELLREF .
-            '|' . self::CALCULATION_REGEXP_COLUMN_RANGE .
-            '|' . self::CALCULATION_REGEXP_ROW_RANGE .
+                                '|' . self::CALCULATION_REGEXP_COLUMN_RANGE .
+                                '|' . self::CALCULATION_REGEXP_ROW_RANGE .
                                 '|' . self::CALCULATION_REGEXP_NUMBER .
                                 '|' . self::CALCULATION_REGEXP_STRING .
                                 '|' . self::CALCULATION_REGEXP_OPENBRACE .
@@ -4009,10 +4010,11 @@ class Calculation
                     --$parenthesisDepthMap[$pendingStoreKey];
                 }
 
-                if (is_array($d) && preg_match('/^' . self::CALCULATION_REGEXP_FUNCTION . '$/miu', $d['value'], $matches)) {    //    Did this parenthesis just close a function?
+                if (is_array($d) && preg_match('/^' . self::CALCULATION_REGEXP_FUNCTION . '$/miu', $d['value'], $matches)) {
+                    //    Did this parenthesis just close a function?
                     if (!empty($pendingStoreKey) && $parenthesisDepthMap[$pendingStoreKey] == -1) {
                         // we are closing an IF(
-                        if ($d['value'] != 'IF(') {
+                        if ($d['value'] !== 'IF(') {
                             return $this->raiseFormulaError('Parser bug we should be in an "IF("');
                         }
                         if ($expectingConditionMap[$pendingStoreKey]) {
@@ -4427,11 +4429,7 @@ class Calculation
 
                 if (
                     isset($storeValue)
-                    && (
-                        !$storeValueAsBool
-                        || Value::isError($storeValue)
-                        || ($storeValue === 'Pruned branch')
-                    )
+                    && (!$storeValueAsBool || ErrorValue::isError($storeValue) || ($storeValue === 'Pruned branch'))
                 ) {
                     // If branching value is not true, we don't need to compute
                     if (!isset($fakedForBranchPruning['onlyIf-' . $onlyIfStoreKey])) {
@@ -4462,11 +4460,7 @@ class Calculation
                 }
                 if (
                     isset($storeValue)
-                    && (
-                        $storeValueAsBool
-                        || Value::isError($storeValue)
-                        || ($storeValue === 'Pruned branch')
-                    )
+                    && ($storeValueAsBool || ErrorValue::isError($storeValue) || ($storeValue === 'Pruned branch'))
                 ) {
                     // If branching value is true, we don't need to compute
                     if (!isset($fakedForBranchPruning['onlyIfNot-' . $onlyIfNotStoreKey])) {
diff --git a/src/PhpSpreadsheet/Calculation/Functions.php b/src/PhpSpreadsheet/Calculation/Functions.php
index c3b7c257..8911a5d4 100644
--- a/src/PhpSpreadsheet/Calculation/Functions.php
+++ b/src/PhpSpreadsheet/Calculation/Functions.php
@@ -346,7 +346,7 @@ class Functions
      * @see Information\Value::isBlank()
      * Use the isBlank() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isBlank($value = null)
     {
@@ -363,11 +363,11 @@ class Functions
      * @see Information\Value::isErr()
      * Use the isErr() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isErr($value = '')
     {
-        return Information\Value::isErr($value);
+        return Information\ErrorValue::isErr($value);
     }
 
     /**
@@ -380,11 +380,11 @@ class Functions
      * @see Information\Value::isError()
      * Use the isError() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isError($value = '')
     {
-        return Information\Value::isError($value);
+        return Information\ErrorValue::isError($value);
     }
 
     /**
@@ -397,11 +397,11 @@ class Functions
      * @see Information\Value::isNa()
      * Use the isNa() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isNa($value = '')
     {
-        return Information\Value::isNa($value);
+        return Information\ErrorValue::isNa($value);
     }
 
     /**
@@ -414,7 +414,7 @@ class Functions
      * @see Information\Value::isEven()
      * Use the isEven() method in the Information\Value class instead
      *
-     * @return bool|string
+     * @return array|bool|string
      */
     public static function isEven($value = null)
     {
@@ -431,7 +431,7 @@ class Functions
      * @see Information\Value::isOdd()
      * Use the isOdd() method in the Information\Value class instead
      *
-     * @return bool|string
+     * @return array|bool|string
      */
     public static function isOdd($value = null)
     {
@@ -448,7 +448,7 @@ class Functions
      * @see Information\Value::isNumber()
      * Use the isNumber() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isNumber($value = null)
     {
@@ -465,7 +465,7 @@ class Functions
      * @see Information\Value::isLogical()
      * Use the isLogical() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isLogical($value = null)
     {
@@ -482,7 +482,7 @@ class Functions
      * @see Information\Value::isText()
      * Use the isText() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isText($value = null)
     {
@@ -499,7 +499,7 @@ class Functions
      * @see Information\Value::isNonText()
      * Use the isNonText() method in the Information\Value class instead
      *
-     * @return bool
+     * @return array|bool
      */
     public static function isNonText($value = null)
     {
diff --git a/src/PhpSpreadsheet/Calculation/Information/ErrorValue.php b/src/PhpSpreadsheet/Calculation/Information/ErrorValue.php
new file mode 100644
index 00000000..dabe7d1c
--- /dev/null
+++ b/src/PhpSpreadsheet/Calculation/Information/ErrorValue.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Calculation\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
+
+class ErrorValue
+{
+    use ArrayEnabled;
+
+    /**
+     * IS_ERR.
+     *
+     * @param mixed $value Value to check
+     *                      Or can be an array of values
+     *
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
+     */
+    public static function isErr($value = '')
+    {
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
+
+        return self::isError($value) && (!self::isNa(($value)));
+    }
+
+    /**
+     * IS_ERROR.
+     *
+     * @param mixed $value Value to check
+     *                      Or can be an array of values
+     *
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
+     */
+    public static function isError($value = '')
+    {
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
+
+        if (!is_string($value)) {
+            return false;
+        }
+
+        return in_array($value, ExcelError::$errorCodes);
+    }
+
+    /**
+     * IS_NA.
+     *
+     * @param mixed $value Value to check
+     *                      Or can be an array of values
+     *
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
+     */
+    public static function isNa($value = '')
+    {
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
+
+        return $value === ExcelError::NA();
+    }
+}
diff --git a/src/PhpSpreadsheet/Calculation/Information/Value.php b/src/PhpSpreadsheet/Calculation/Information/Value.php
index 9c4d09b0..21e05d0b 100644
--- a/src/PhpSpreadsheet/Calculation/Information/Value.php
+++ b/src/PhpSpreadsheet/Calculation/Information/Value.php
@@ -2,21 +2,31 @@
 
 namespace PhpOffice\PhpSpreadsheet\Calculation\Information;
 
+use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
 use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
 
 class Value
 {
+    use ArrayEnabled;
+
     /**
      * IS_BLANK.
      *
      * @param mixed $value Value to check
+     *                      Or can be an array of values
      *
-     * @return bool
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function isBlank($value = null)
     {
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
+
         if ($value !== null) {
             $value = Functions::flattenSingleValue($value);
         }
@@ -28,12 +38,17 @@ class Value
      * IS_EVEN.
      *
      * @param mixed $value Value to check
+     *                      Or can be an array of values
      *
-     * @return bool|string
+     * @return array|bool|string
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function isEven($value = null)
     {
-        $value = Functions::flattenSingleValue($value);
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
 
         if ($value === null) {
             return ExcelError::NAME();
@@ -48,12 +63,17 @@ class Value
      * IS_ODD.
      *
      * @param mixed $value Value to check
+     *                      Or can be an array of values
      *
-     * @return bool|string
+     * @return array|bool|string
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function isOdd($value = null)
     {
-        $value = Functions::flattenSingleValue($value);
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
 
         if ($value === null) {
             return ExcelError::NAME();
@@ -68,12 +88,17 @@ class Value
      * IS_NUMBER.
      *
      * @param mixed $value Value to check
+     *                      Or can be an array of values
      *
-     * @return bool
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function isNumber($value = null)
     {
-        $value = Functions::flattenSingleValue($value);
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
 
         if (is_string($value)) {
             return false;
@@ -86,12 +111,17 @@ class Value
      * IS_LOGICAL.
      *
      * @param mixed $value Value to check
+     *                      Or can be an array of values
      *
-     * @return bool
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function isLogical($value = null)
     {
-        $value = Functions::flattenSingleValue($value);
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
 
         return is_bool($value);
     }
@@ -100,25 +130,37 @@ class Value
      * IS_TEXT.
      *
      * @param mixed $value Value to check
+     *                      Or can be an array of values
      *
-     * @return bool
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function isText($value = null)
     {
-        $value = Functions::flattenSingleValue($value);
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
 
-        return is_string($value) && !self::isError($value);
+        return is_string($value) && !ErrorValue::isError($value);
     }
 
     /**
      * IS_NONTEXT.
      *
      * @param mixed $value Value to check
+     *                      Or can be an array of values
      *
-     * @return bool
+     * @return array|bool
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function isNonText($value = null)
     {
+        if (is_array($value)) {
+            return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $value);
+        }
+
         return !self::isText($value);
     }
 
@@ -150,52 +192,6 @@ class Value
         return ($worksheet !== null) ? $worksheet->getCell($cellReference)->isFormula() : ExcelError::REF();
     }
 
-    /**
-     * IS_ERR.
-     *
-     * @param mixed $value Value to check
-     *
-     * @return bool
-     */
-    public static function isErr($value = '')
-    {
-        $value = Functions::flattenSingleValue($value);
-
-        return self::isError($value) && (!self::isNa(($value)));
-    }
-
-    /**
-     * IS_ERROR.
-     *
-     * @param mixed $value Value to check
-     *
-     * @return bool
-     */
-    public static function isError($value = '')
-    {
-        $value = Functions::flattenSingleValue($value);
-
-        if (!is_string($value)) {
-            return false;
-        }
-
-        return in_array($value, ExcelError::$errorCodes);
-    }
-
-    /**
-     * IS_NA.
-     *
-     * @param mixed $value Value to check
-     *
-     * @return bool
-     */
-    public static function isNa($value = '')
-    {
-        $value = Functions::flattenSingleValue($value);
-
-        return $value === ExcelError::NA();
-    }
-
     /**
      * N.
      *
@@ -205,12 +201,12 @@ class Value
      *
      * @return number N converts values listed in the following table
      *        If value is or refers to N returns
-     *        A number            That number
-     *        A date                The serial number of that date
+     *        A number            That number value
+     *        A date              The Excel serialized number of that date
      *        TRUE                1
-     *        FALSE                0
-     *        An error value        The error value
-     *        Anything else        0
+     *        FALSE               0
+     *        An error value      The error value
+     *        Anything else       0
      */
     public static function asNumber($value = null)
     {
@@ -248,9 +244,9 @@ class Value
      *        If value is or refers to N returns
      *        A number            1
      *        Text                2
-     *        Logical Value        4
-     *        An error value        16
-     *        Array or Matrix        64
+     *        Logical Value       4
+     *        An error value      16
+     *        Array or Matrix     64
      */
     public static function type($value = null)
     {
@@ -269,8 +265,8 @@ class Value
             //    Empty Cell
             return 1;
         }
-        $value = Functions::flattenSingleValue($value);
 
+        $value = Functions::flattenSingleValue($value);
         if (($value === null) || (is_float($value)) || (is_int($value))) {
             return 1;
         } elseif (is_bool($value)) {
diff --git a/src/PhpSpreadsheet/Calculation/Logical/Conditional.php b/src/PhpSpreadsheet/Calculation/Logical/Conditional.php
index 86842d3a..6a7757ce 100644
--- a/src/PhpSpreadsheet/Calculation/Logical/Conditional.php
+++ b/src/PhpSpreadsheet/Calculation/Logical/Conditional.php
@@ -5,6 +5,7 @@ namespace PhpOffice\PhpSpreadsheet\Calculation\Logical;
 use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
 use PhpOffice\PhpSpreadsheet\Calculation\Exception;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\Value;
 
@@ -47,15 +48,16 @@ class Conditional
      */
     public static function statementIf($condition = true, $returnIfTrue = 0, $returnIfFalse = false)
     {
-        if (Value::isError($condition)) {
+        $condition = ($condition === null) ? true : Functions::flattenSingleValue($condition);
+
+        if (ErrorValue::isError($condition)) {
             return $condition;
         }
 
-        $condition = ($condition === null) ? true : (bool) Functions::flattenSingleValue($condition);
         $returnIfTrue = $returnIfTrue ?? 0;
         $returnIfFalse = $returnIfFalse ?? false;
 
-        return ($condition) ? $returnIfTrue : $returnIfFalse;
+        return ((bool) $condition) ? $returnIfTrue : $returnIfFalse;
     }
 
     /**
@@ -138,7 +140,7 @@ class Conditional
 
         $errorpart = $errorpart ?? '';
 
-        return self::statementIf(Value::isError($testValue), $errorpart, $testValue);
+        return self::statementIf(ErrorValue::isError($testValue), $errorpart, $testValue);
     }
 
     /**
@@ -164,7 +166,7 @@ class Conditional
 
         $napart = $napart ?? '';
 
-        return self::statementIf(Value::isNa($testValue), $napart, $testValue);
+        return self::statementIf(ErrorValue::isNa($testValue), $napart, $testValue);
     }
 
     /**
diff --git a/src/PhpSpreadsheet/Calculation/LookupRef/LookupRefValidations.php b/src/PhpSpreadsheet/Calculation/LookupRef/LookupRefValidations.php
index e1f39765..2282bf47 100644
--- a/src/PhpSpreadsheet/Calculation/LookupRef/LookupRefValidations.php
+++ b/src/PhpSpreadsheet/Calculation/LookupRef/LookupRefValidations.php
@@ -3,8 +3,8 @@
 namespace PhpOffice\PhpSpreadsheet\Calculation\LookupRef;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Exception;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
-use PhpOffice\PhpSpreadsheet\Calculation\Information\Value;
 
 class LookupRefValidations
 {
@@ -14,7 +14,7 @@ class LookupRefValidations
     public static function validateInt($value): int
     {
         if (!is_numeric($value)) {
-            if (Value::isError($value)) {
+            if (ErrorValue::isError($value)) {
                 throw new Exception($value);
             }
 
diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Sum.php b/src/PhpSpreadsheet/Calculation/MathTrig/Sum.php
index 82b261f1..1a797c8a 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Sum.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Sum.php
@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\Value;
 
@@ -29,7 +30,7 @@ class Sum
             // Is it a numeric value?
             if (is_numeric($arg)) {
                 $returnValue += $arg;
-            } elseif (Value::isError($arg)) {
+            } elseif (ErrorValue::isError($arg)) {
                 return $arg;
             }
         }
@@ -63,7 +64,7 @@ class Sum
                 $returnValue += $arg;
             } elseif (is_bool($arg)) {
                 $returnValue += (int) $arg;
-            } elseif (Value::isError($arg)) {
+            } elseif (ErrorValue::isError($arg)) {
                 return $arg;
             // ignore non-numerics from cell, but fail as literals (except null)
             } elseif ($arg !== null && !Functions::isCellValue($k)) {
diff --git a/src/PhpSpreadsheet/Calculation/Statistical.php b/src/PhpSpreadsheet/Calculation/Statistical.php
index 73db0aa7..497c9297 100644
--- a/src/PhpSpreadsheet/Calculation/Statistical.php
+++ b/src/PhpSpreadsheet/Calculation/Statistical.php
@@ -1811,7 +1811,7 @@ class Statistical
      * @param float $m0 Alpha Parameter
      * @param float $sigma Beta Parameter
      *
-     * @return float|string (string if result is an error)
+     * @return array|float|string (string if result is an error)
      */
     public static function ZTEST($dataSet, $m0, $sigma = null)
     {
diff --git a/src/PhpSpreadsheet/Calculation/Statistical/Distributions/StandardNormal.php b/src/PhpSpreadsheet/Calculation/Statistical/Distributions/StandardNormal.php
index 31a02e29..8239dac8 100644
--- a/src/PhpSpreadsheet/Calculation/Statistical/Distributions/StandardNormal.php
+++ b/src/PhpSpreadsheet/Calculation/Statistical/Distributions/StandardNormal.php
@@ -117,16 +117,22 @@ class StandardNormal
      *
      * @param mixed $dataSet The dataset should be an array of float values for the observations
      * @param mixed $m0 Alpha Parameter
+     *                      Or can be an array of values
      * @param mixed $sigma A null or float value for the Beta (Standard Deviation) Parameter;
      *                       if null, we use the standard deviation of the dataset
+     *                      Or can be an array of values
      *
-     * @return float|string (string if result is an error)
+     * @return array|float|string (string if result is an error)
+     *         If an array of numbers is passed as an argument, then the returned result will also be an array
+     *            with the same dimensions
      */
     public static function zTest($dataSet, $m0, $sigma = null)
     {
+        if (is_array($m0) || is_array($sigma)) {
+            return self::evaluateArrayArgumentsSubsetFrom([self::class, __FUNCTION__], 1, $dataSet, $m0, $sigma);
+        }
+
         $dataSet = Functions::flattenArrayIndexed($dataSet);
-        $m0 = Functions::flattenSingleValue($m0);
-        $sigma = Functions::flattenSingleValue($sigma);
 
         if (!is_numeric($m0) || ($sigma !== null && !is_numeric($sigma))) {
             return ExcelError::VALUE();
diff --git a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
index 2028fa30..c5502a33 100644
--- a/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
+++ b/src/PhpSpreadsheet/Writer/Xlsx/Worksheet.php
@@ -2,6 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ErrorValue;
 use PhpOffice\PhpSpreadsheet\Calculation\Information\Value;
 use PhpOffice\PhpSpreadsheet\Cell\Cell;
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
@@ -1251,7 +1252,7 @@ class Worksheet extends WriterPart
     {
         $calculatedValue = $this->getParentWriter()->getPreCalculateFormulas() ? $cell->getCalculatedValue() : $cellValue;
         if (is_string($calculatedValue)) {
-            if (Value::isError($calculatedValue)) {
+            if (ErrorValue::isError($calculatedValue)) {
                 $this->writeCellError($objWriter, 'e', $cellValue, $calculatedValue);
 
                 return;
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsBlankTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsBlankTest.php
new file mode 100644
index 00000000..0cf03591
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsBlankTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsBlankTest extends TestCase
+{
+    public function testIsBlankNoArgument(): void
+    {
+        $result = Functions::isBlank();
+        self::assertTrue($result);
+    }
+
+    /**
+     * @dataProvider providerIsBlank
+     *
+     * @param mixed $value
+     */
+    public function testIsBlank(bool $expectedResult, $value): void
+    {
+        $result = Functions::isBlank($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsBlank(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_BLANK.php';
+    }
+
+    /**
+     * @dataProvider providerIsBlankArray
+     */
+    public function testIsBlankArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISBLANK({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsBlankArray(): array
+    {
+        return [
+            'vector' => [
+                [[false, true, false]],
+                '{12, NULL, ""}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrTest.php
new file mode 100644
index 00000000..1360a607
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsErrTest extends TestCase
+{
+    public function testIsErrNoArgument(): void
+    {
+        $result = Functions::isErr();
+        self::assertFalse($result);
+    }
+
+    /**
+     * @dataProvider providerIsErr
+     *
+     * @param mixed $value
+     */
+    public function testIsErr(bool $expectedResult, $value): void
+    {
+        $result = Functions::isErr($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsErr(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_ERR.php';
+    }
+
+    /**
+     * @dataProvider providerIsErrArray
+     */
+    public function testIsErrArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISERR({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsErrArray(): array
+    {
+        return [
+            'vector' => [
+                [[true, true, false, false, false, false]],
+                '{5/0, "#REF!", "#N/A", 1.2, TRUE, "PHP"}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrorTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrorTest.php
new file mode 100644
index 00000000..674062ee
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsErrorTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsErrorTest extends TestCase
+{
+    public function testIsErrorNoArgument(): void
+    {
+        $result = Functions::isError();
+        self::assertFalse($result);
+    }
+
+    /**
+     * @dataProvider providerIsError
+     *
+     * @param mixed $value
+     */
+    public function testIsError(bool $expectedResult, $value): void
+    {
+        $result = Functions::isError($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsError(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_ERROR.php';
+    }
+
+    /**
+     * @dataProvider providerIsErrorArray
+     */
+    public function testIsErrorArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISERROR({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsErrorArray(): array
+    {
+        return [
+            'vector' => [
+                [[true, true, true, false, false, false]],
+                '{5/0, "#REF!", "#N/A", 1.2, TRUE, "PHP"}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsEvenTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsEvenTest.php
new file mode 100644
index 00000000..baad4816
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsEvenTest.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
+use PHPUnit\Framework\TestCase;
+
+class IsEvenTest extends TestCase
+{
+    public function testIsEvenNoArgument(): void
+    {
+        $result = Functions::isEven();
+        self::assertSame(ExcelError::NAME(), $result);
+    }
+
+    /**
+     * @dataProvider providerIsEven
+     *
+     * @param bool|string $expectedResult
+     * @param mixed $value
+     */
+    public function testIsEven($expectedResult, $value): void
+    {
+        $result = Functions::isEven($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsEven(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_EVEN.php';
+    }
+
+    /**
+     * @dataProvider providerIsEvenArray
+     */
+    public function testIsEvenArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISEVEN({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsEvenArray(): array
+    {
+        return [
+            'vector' => [
+                [[true, false, true, false, true]],
+                '{-2, -1, 0, 1, 2}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsLogicalTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsLogicalTest.php
new file mode 100644
index 00000000..0c220aee
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsLogicalTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsLogicalTest extends TestCase
+{
+    public function testIsLogicalNoArgument(): void
+    {
+        $result = Functions::isLogical();
+        self::assertFalse($result);
+    }
+
+    /**
+     * @dataProvider providerIsLogical
+     *
+     * @param mixed $value
+     */
+    public function testIsLogical(bool $expectedResult, $value): void
+    {
+        $result = Functions::isLogical($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsLogical(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_LOGICAL.php';
+    }
+
+    /**
+     * @dataProvider providerIsLogicalArray
+     */
+    public function testIsLogicalArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISLOGICAL({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsLogicalArray(): array
+    {
+        return [
+            'vector' => [
+                [[true, false, false, false, true, false]],
+                '{true, -1, null, 1, false, "FALSE"}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNaTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNaTest.php
new file mode 100644
index 00000000..5fac18fa
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNaTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsNaTest extends TestCase
+{
+    public function testIsNaNoArgument(): void
+    {
+        $result = Functions::isNa();
+        self::assertFalse($result);
+    }
+
+    /**
+     * @dataProvider providerIsNa
+     *
+     * @param mixed $value
+     */
+    public function testIsNa(bool $expectedResult, $value): void
+    {
+        $result = Functions::isNa($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsNa(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_NA.php';
+    }
+
+    /**
+     * @dataProvider providerIsNaArray
+     */
+    public function testIsNaArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISNA({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsNaArray(): array
+    {
+        return [
+            'vector' => [
+                [[false, false, true, false, false, false]],
+                '{5/0, "#REF!", "#N/A", 1.2, TRUE, "PHP"}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNonTextTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNonTextTest.php
new file mode 100644
index 00000000..759d7b30
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNonTextTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsNonTextTest extends TestCase
+{
+    public function testIsNonTextNoArgument(): void
+    {
+        $result = Functions::isNonText();
+        self::assertTrue($result);
+    }
+
+    /**
+     * @dataProvider providerIsNonText
+     *
+     * @param mixed $value
+     */
+    public function testIsNonText(bool $expectedResult, $value): void
+    {
+        $result = Functions::isNonText($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsNonText(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_NONTEXT.php';
+    }
+
+    /**
+     * @dataProvider providerIsNonTextArray
+     */
+    public function testIsNonTextArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISNONTEXT({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsNonTextArray(): array
+    {
+        return [
+            'vector' => [
+                [[true, false, false, true, true]],
+                '{-2, "PHP", "123.456", false, 2.34}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNumberTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNumberTest.php
new file mode 100644
index 00000000..649e4335
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsNumberTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsNumberTest extends TestCase
+{
+    public function testIsNumberNoArgument(): void
+    {
+        $result = Functions::isNumber();
+        self::assertFalse($result);
+    }
+
+    /**
+     * @dataProvider providerIsNumber
+     *
+     * @param mixed $value
+     */
+    public function testIsNumber(bool $expectedResult, $value): void
+    {
+        $result = Functions::isNumber($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsNumber(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_NUMBER.php';
+    }
+
+    /**
+     * @dataProvider providerIsNumberArray
+     */
+    public function testIsNumberArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISNUMBER({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsNumberArray(): array
+    {
+        return [
+            'vector' => [
+                [[true, false, false, false, true]],
+                '{-2, "PHP", "123.456", false, 2.34}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsOddTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsOddTest.php
new file mode 100644
index 00000000..4f31ff38
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsOddTest.php
@@ -0,0 +1,56 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
+use PHPUnit\Framework\TestCase;
+
+class IsOddTest extends TestCase
+{
+    public function testIsOddNoArgument(): void
+    {
+        $result = Functions::isOdd();
+        self::assertSame(ExcelError::NAME(), $result);
+    }
+
+    /**
+     * @dataProvider providerIsOdd
+     *
+     * @param bool|string $expectedResult
+     * @param mixed $value
+     */
+    public function testIsOdd($expectedResult, $value): void
+    {
+        $result = Functions::isOdd($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsOdd(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_ODD.php';
+    }
+
+    /**
+     * @dataProvider providerIsOddArray
+     */
+    public function testIsOddArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISODD({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsOddArray(): array
+    {
+        return [
+            'vector' => [
+                [[false, true, false, true, false]],
+                '{-2, -1, 0, 1, 2}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsTextTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsTextTest.php
new file mode 100644
index 00000000..cdbba409
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/IsTextTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class IsTextTest extends TestCase
+{
+    public function testIsTextNoArgument(): void
+    {
+        $result = Functions::isText();
+        self::assertFalse($result);
+    }
+
+    /**
+     * @dataProvider providerIsText
+     *
+     * @param mixed $value
+     */
+    public function testIsText(bool $expectedResult, $value): void
+    {
+        $result = Functions::isText($value);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsText(): array
+    {
+        return require 'tests/data/Calculation/Information/IS_TEXT.php';
+    }
+
+    /**
+     * @dataProvider providerIsTextArray
+     */
+    public function testIsTextArray(array $expectedResult, string $values): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ISTEXT({$values})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEquals($expectedResult, $result);
+    }
+
+    public function providerIsTextArray(): array
+    {
+        return [
+            'vector' => [
+                [[false, true, true, false, false]],
+                '{-2, "PHP", "123.456", false, 2.34}',
+            ],
+        ];
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/NTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/NTest.php
new file mode 100644
index 00000000..1ff5a03d
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/NTest.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class NTest extends TestCase
+{
+    public function testNNoArgument(): void
+    {
+        $result = Functions::n();
+        self::assertSame(0, $result);
+    }
+
+    /**
+     * @dataProvider providerN
+     *
+     * @param mixed $expectedResult
+     * @param number|string $value
+     */
+    public function testN($expectedResult, $value): void
+    {
+        $result = Functions::n($value);
+        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-12);
+    }
+
+    public function providerN(): array
+    {
+        return require 'tests/data/Calculation/Information/N.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Information/TypeTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/TypeTest.php
new file mode 100644
index 00000000..3b972309
--- /dev/null
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Information/TypeTest.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Information;
+
+use PhpOffice\PhpSpreadsheet\Calculation\Functions;
+use PHPUnit\Framework\TestCase;
+
+class TypeTest extends TestCase
+{
+    public function testTypeNoArgument(): void
+    {
+        $result = Functions::TYPE();
+        self::assertSame(1, $result);
+    }
+
+    /**
+     * @dataProvider providerTYPE
+     *
+     * @param mixed $value
+     */
+    public function testTYPE(int $expectedResult, $value): void
+    {
+        $result = Functions::TYPE($value);
+        self::assertSame($expectedResult, $result);
+    }
+
+    public function providerTYPE(): array
+    {
+        return require 'tests/data/Calculation/Information/TYPE.php';
+    }
+}
diff --git a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/ZTestTest.php b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/ZTestTest.php
index 4dc3af9b..de094f74 100644
--- a/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/ZTestTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/Functions/Statistical/ZTestTest.php
@@ -2,6 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheetTests\Calculation\Functions\Statistical;
 
+use PhpOffice\PhpSpreadsheet\Calculation\Calculation;
 use PhpOffice\PhpSpreadsheet\Calculation\Statistical;
 use PHPUnit\Framework\TestCase;
 
@@ -25,4 +26,29 @@ class ZTestTest extends TestCase
     {
         return require 'tests/data/Calculation/Statistical/ZTEST.php';
     }
+
+    /**
+     * @dataProvider providerZTestArray
+     */
+    public function testZTestArray(array $expectedResult, string $dataSet, string $m0): void
+    {
+        $calculation = Calculation::getInstance();
+
+        $formula = "=ZTEST({$dataSet}, {$m0})";
+        $result = $calculation->_calculateFormulaValue($formula);
+        self::assertEqualsWithDelta($expectedResult, $result, 1.0e-14);
+    }
+
+    public function providerZTestArray(): array
+    {
+        return [
+            'row vector' => [
+                [
+                    [0.09057419685136381, 0.4516213175273426, 0.8630433891295299],
+                ],
+                '{3, 6, 7, 8, 6, 5, 4, 2, 1, 9}',
+                '{4, 5, 6}',
+            ],
+        ];
+    }
 }
diff --git a/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php b/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php
index 0f518ea5..16fe8651 100644
--- a/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php
+++ b/tests/PhpSpreadsheetTests/Calculation/FunctionsTest.php
@@ -116,54 +116,6 @@ class FunctionsTest extends TestCase
         self::assertEquals('#VALUE!', $result);
     }
 
-    /**
-     * @dataProvider providerIsBlank
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsBlank($expectedResult, ...$args): void
-    {
-        $result = Functions::isBlank(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsBlank(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_BLANK.php';
-    }
-
-    /**
-     * @dataProvider providerIsErr
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsErr($expectedResult, ...$args): void
-    {
-        $result = Functions::isErr(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsErr(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_ERR.php';
-    }
-
-    /**
-     * @dataProvider providerIsError
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsError($expectedResult, ...$args): void
-    {
-        $result = Functions::isError(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsError(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_ERROR.php';
-    }
-
     /**
      * @dataProvider providerErrorType
      *
@@ -180,150 +132,6 @@ class FunctionsTest extends TestCase
         return require 'tests/data/Calculation/Functions/ERROR_TYPE.php';
     }
 
-    /**
-     * @dataProvider providerIsLogical
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsLogical($expectedResult, ...$args): void
-    {
-        $result = Functions::isLogical(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsLogical(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_LOGICAL.php';
-    }
-
-    /**
-     * @dataProvider providerIsNa
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsNa($expectedResult, ...$args): void
-    {
-        $result = Functions::isNa(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsNa(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_NA.php';
-    }
-
-    /**
-     * @dataProvider providerIsNumber
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsNumber($expectedResult, ...$args): void
-    {
-        $result = Functions::isNumber(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsNumber(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_NUMBER.php';
-    }
-
-    /**
-     * @dataProvider providerIsText
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsText($expectedResult, ...$args): void
-    {
-        $result = Functions::isText(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsText(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_TEXT.php';
-    }
-
-    /**
-     * @dataProvider providerIsNonText
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsNonText($expectedResult, ...$args): void
-    {
-        $result = Functions::isNonText(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsNonText(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_NONTEXT.php';
-    }
-
-    /**
-     * @dataProvider providerIsEven
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsEven($expectedResult, ...$args): void
-    {
-        $result = Functions::isEven(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsEven(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_EVEN.php';
-    }
-
-    /**
-     * @dataProvider providerIsOdd
-     *
-     * @param mixed $expectedResult
-     */
-    public function testIsOdd($expectedResult, ...$args): void
-    {
-        $result = Functions::isOdd(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerIsOdd(): array
-    {
-        return require 'tests/data/Calculation/Functions/IS_ODD.php';
-    }
-
-    /**
-     * @dataProvider providerTYPE
-     *
-     * @param mixed $expectedResult
-     */
-    public function testTYPE($expectedResult, ...$args): void
-    {
-        $result = Functions::TYPE(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerTYPE(): array
-    {
-        return require 'tests/data/Calculation/Functions/TYPE.php';
-    }
-
-    /**
-     * @dataProvider providerN
-     *
-     * @param mixed $expectedResult
-     */
-    public function testN($expectedResult, ...$args): void
-    {
-        $result = Functions::n(...$args);
-        self::assertEqualsWithDelta($expectedResult, $result, 1E-8);
-    }
-
-    public function providerN(): array
-    {
-        return require 'tests/data/Calculation/Functions/N.php';
-    }
-
     /**
      * @dataProvider providerIfCondition
      *
diff --git a/tests/data/Calculation/Functions/IS_BLANK.php b/tests/data/Calculation/Information/IS_BLANK.php
similarity index 96%
rename from tests/data/Calculation/Functions/IS_BLANK.php
rename to tests/data/Calculation/Information/IS_BLANK.php
index 83f25163..c2c9aec1 100644
--- a/tests/data/Calculation/Functions/IS_BLANK.php
+++ b/tests/data/Calculation/Information/IS_BLANK.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        true,
-    ],
     [
         true,
         null,
diff --git a/tests/data/Calculation/Functions/IS_ERR.php b/tests/data/Calculation/Information/IS_ERR.php
similarity index 95%
rename from tests/data/Calculation/Functions/IS_ERR.php
rename to tests/data/Calculation/Information/IS_ERR.php
index 1678843b..2e737347 100644
--- a/tests/data/Calculation/Functions/IS_ERR.php
+++ b/tests/data/Calculation/Information/IS_ERR.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        false,
-    ],
     [
         false,
         null,
diff --git a/tests/data/Calculation/Functions/IS_ERROR.php b/tests/data/Calculation/Information/IS_ERROR.php
similarity index 95%
rename from tests/data/Calculation/Functions/IS_ERROR.php
rename to tests/data/Calculation/Information/IS_ERROR.php
index db35752c..0755fd81 100644
--- a/tests/data/Calculation/Functions/IS_ERROR.php
+++ b/tests/data/Calculation/Information/IS_ERROR.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        false,
-    ],
     [
         false,
         null,
diff --git a/tests/data/Calculation/Functions/IS_EVEN.php b/tests/data/Calculation/Information/IS_EVEN.php
similarity index 96%
rename from tests/data/Calculation/Functions/IS_EVEN.php
rename to tests/data/Calculation/Information/IS_EVEN.php
index 29707157..ad009b58 100644
--- a/tests/data/Calculation/Functions/IS_EVEN.php
+++ b/tests/data/Calculation/Information/IS_EVEN.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        '#NAME?',
-    ],
     [
         '#NAME?',
         null,
diff --git a/tests/data/Calculation/Functions/IS_LOGICAL.php b/tests/data/Calculation/Information/IS_LOGICAL.php
similarity index 95%
rename from tests/data/Calculation/Functions/IS_LOGICAL.php
rename to tests/data/Calculation/Information/IS_LOGICAL.php
index e38cbf8b..e63fff9b 100644
--- a/tests/data/Calculation/Functions/IS_LOGICAL.php
+++ b/tests/data/Calculation/Information/IS_LOGICAL.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        false,
-    ],
     [
         false,
         null,
diff --git a/tests/data/Calculation/Functions/IS_NA.php b/tests/data/Calculation/Information/IS_NA.php
similarity index 95%
rename from tests/data/Calculation/Functions/IS_NA.php
rename to tests/data/Calculation/Information/IS_NA.php
index 4e95ce2c..c5ebdf79 100644
--- a/tests/data/Calculation/Functions/IS_NA.php
+++ b/tests/data/Calculation/Information/IS_NA.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        false,
-    ],
     [
         false,
         null,
diff --git a/tests/data/Calculation/Functions/IS_NONTEXT.php b/tests/data/Calculation/Information/IS_NONTEXT.php
similarity index 95%
rename from tests/data/Calculation/Functions/IS_NONTEXT.php
rename to tests/data/Calculation/Information/IS_NONTEXT.php
index 96650ad4..2fd5872c 100644
--- a/tests/data/Calculation/Functions/IS_NONTEXT.php
+++ b/tests/data/Calculation/Information/IS_NONTEXT.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        true,
-    ],
     [
         true,
         null,
diff --git a/tests/data/Calculation/Functions/IS_NUMBER.php b/tests/data/Calculation/Information/IS_NUMBER.php
similarity index 95%
rename from tests/data/Calculation/Functions/IS_NUMBER.php
rename to tests/data/Calculation/Information/IS_NUMBER.php
index 6e6815be..a9e33453 100644
--- a/tests/data/Calculation/Functions/IS_NUMBER.php
+++ b/tests/data/Calculation/Information/IS_NUMBER.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        false,
-    ],
     [
         false,
         null,
diff --git a/tests/data/Calculation/Functions/IS_ODD.php b/tests/data/Calculation/Information/IS_ODD.php
similarity index 96%
rename from tests/data/Calculation/Functions/IS_ODD.php
rename to tests/data/Calculation/Information/IS_ODD.php
index a12b8cfa..890bd6a2 100644
--- a/tests/data/Calculation/Functions/IS_ODD.php
+++ b/tests/data/Calculation/Information/IS_ODD.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        '#NAME?',
-    ],
     [
         '#NAME?',
         null,
diff --git a/tests/data/Calculation/Functions/IS_TEXT.php b/tests/data/Calculation/Information/IS_TEXT.php
similarity index 95%
rename from tests/data/Calculation/Functions/IS_TEXT.php
rename to tests/data/Calculation/Information/IS_TEXT.php
index a33b2a29..998f8e27 100644
--- a/tests/data/Calculation/Functions/IS_TEXT.php
+++ b/tests/data/Calculation/Information/IS_TEXT.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        false,
-    ],
     [
         false,
         null,
diff --git a/tests/data/Calculation/Functions/N.php b/tests/data/Calculation/Information/N.php
similarity index 98%
rename from tests/data/Calculation/Functions/N.php
rename to tests/data/Calculation/Information/N.php
index a5c344b2..3fc527da 100644
--- a/tests/data/Calculation/Functions/N.php
+++ b/tests/data/Calculation/Information/N.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        0,
-    ],
     [
         0,
         null,
diff --git a/tests/data/Calculation/Functions/TYPE.php b/tests/data/Calculation/Information/TYPE.php
similarity index 97%
rename from tests/data/Calculation/Functions/TYPE.php
rename to tests/data/Calculation/Information/TYPE.php
index d029d32a..c6aefb77 100644
--- a/tests/data/Calculation/Functions/TYPE.php
+++ b/tests/data/Calculation/Information/TYPE.php
@@ -1,9 +1,6 @@
 <?php
 
 return [
-    [
-        1,
-    ],
     [
         1,
         null,