Allow single cell AutoFilter range

src/PhpSpreadsheet/Worksheet/AutoFilter.php

@@ -9,6 +9,7 @@ use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 use PhpOffice\PhpSpreadsheet\Calculation\Internal\WildcardMatch;
 use PhpOffice\PhpSpreadsheet\Cell\AddressRange;
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
+use PhpOffice\PhpSpreadsheet\Exception;
 use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 use PhpOffice\PhpSpreadsheet\Shared\Date;
 use PhpOffice\PhpSpreadsheet\Worksheet\AutoFilter\Column\Rule;
@@ -104,7 +105,7 @@ class AutoFilter
      * Set AutoFilter Cell Range.
      *
      * @param AddressRange|array<int>|string $range
-     *            A simple string containing a Cell range like 'A1:E10' is permitted
+     *            A simple string containing a Cell range like 'A1:E10' or a Cell address like 'A1' is permitted
      *              or passing in an array of [$fromColumnIndex, $fromRow, $toColumnIndex, $toRow] (e.g. [3, 5, 6, 8]),
      *              or an AddressRange object.
      */
@@ -115,6 +116,7 @@ class AutoFilter
         if ($range !== '') {
             [, $range] = Worksheet::extractSheetTitle(Validations::validateCellRange($range), true);
         }
+
         if (empty($range)) {
             //    Discard all column rules
             $this->columns = [];
@@ -123,8 +125,8 @@ class AutoFilter
             return $this;
         }
 
-        if (strpos($range, ':') === false) {
+        if (ctype_digit($range) || ctype_alpha($range)) {
-            throw new PhpSpreadsheetException('Autofilter must be set on a range of cells.');
+            throw new Exception("{$range} is an invalid range for AutoFilter");
         }
 
         $this->range = $range;

src/PhpSpreadsheet/Writer/Xlsx/DefinedNames.php

@@ -115,7 +115,9 @@ class DefinedNames
             [, $range[0]] = Worksheet::extractSheetTitle($range[0], true);
 
             $range[0] = Coordinate::absoluteCoordinate($range[0]);
+            if (count($range) > 1) {
                 $range[1] = Coordinate::absoluteCoordinate($range[1]);
+            }
             $range = implode(':', $range);
 
             $this->objWriter->writeRawData('\'' . str_replace("'", "''", $worksheet->getTitle()) . '\'!' . $range);

tests/PhpSpreadsheetTests/Worksheet/AutoFilter/AutoFilterTest.php

@@ -65,6 +65,7 @@ class AutoFilterTest extends SetupTeardown
         $ranges = [
             'G1:J512' => "$title!G1:J512",
             'K1:N20' => 'K1:N20',
+            'B10' => 'B10',
         ];
 
         foreach ($ranges as $actualRange => $fullRange) {
@@ -94,11 +95,22 @@ class AutoFilterTest extends SetupTeardown
         self::assertEquals($expectedResult, $result);
     }
 
-    public function testSetRangeInvalidRange(): void
+    public function testSetRangeInvalidRowRange(): void
     {
         $this->expectException(PhpSpreadsheetException::class);
 
-        $expectedResult = 'A1';
+        $expectedResult = '999';
+
+        $sheet = $this->getSheet();
+        $autoFilter = $sheet->getAutoFilter();
+        $autoFilter->setRange($expectedResult);
+    }
+
+    public function testSetRangeInvalidColumnRange(): void
+    {
+        $this->expectException(PhpSpreadsheetException::class);
+
+        $expectedResult = 'ABC';
 
         $sheet = $this->getSheet();
         $autoFilter = $sheet->getAutoFilter();