Fix issue when reading Stream size and fstat fails

src/Message/Stream.php

@@ -92,7 +92,10 @@ class Stream implements StreamInterface
     public function getSize()
     {
         $statistics = fstat($this->resource);
-        return $statistics["size"] ?: null;
+        if ($statistics && $statistics["size"]) {
+            return $statistics["size"];
+        }
+        return null;
     }
 
     /**
@@ -105,9 +108,7 @@ class Stream implements StreamInterface
     {
         $position = ftell($this->resource);
         if ($position === false) {
-            // @codeCoverageIgnoreStart
             throw new \RuntimeException("Unable to retrieve current position of file pointer.");
-            // @codeCoverageIgnoreEnd
         }
         return $position;
     }
@@ -151,9 +152,7 @@ class Stream implements StreamInterface
             $result = fseek($this->resource, $offset, $whence);
         }
         if ($result === -1) {
-            // @codeCoverageIgnoreStart
             throw new \RuntimeException("Unable to seek to position.");
-            // @codeCoverageIgnoreEnd
         }
     }
 
@@ -174,9 +173,7 @@ class Stream implements StreamInterface
             $result = rewind($this->resource);
         }
         if ($result === false) {
-            // @codeCoverageIgnoreStart
             throw new \RuntimeException("Unable to seek to position.");
-            // @codeCoverageIgnoreEnd
         }
     }
 

test/tests/unit/Message/StreamTest.php

@@ -10,11 +10,13 @@ use WellRESTed\Test\TestCase;
 class StreamTest extends TestCase
 {
     private $resource;
+    private $resourceDevNull;
     private $content = "Hello, world!";
 
     public function setUp(): void
     {
         $this->resource = fopen("php://memory", "w+");
+        $this->resourceDevNull = fopen("/dev/null", "r");
         fwrite($this->resource, $this->content);
     }
 
@@ -39,6 +41,7 @@ class StreamTest extends TestCase
 
     /**
      * @dataProvider invalidResourceProvider
+     * @param mixed $resource
      */
     public function testThrowsExceptionWithInvalidResource($resource)
     {
@@ -88,6 +91,12 @@ class StreamTest extends TestCase
         $this->assertEquals(strlen($this->content), $stream->getSize());
     }
 
+    public function testReturnsNullForSizeWhenUnableToReadFromFstat()
+    {
+        $stream = new Stream($this->resourceDevNull);
+        $this->assertNull($stream->getSize());
+    }
+
     public function testTellReturnsHandlePosition()
     {
         $stream = new Stream($this->resource);
@@ -95,6 +104,13 @@ class StreamTest extends TestCase
         $this->assertEquals(10, $stream->tell());
     }
 
+    public function testTellThrowsRuntimeExceptionWhenUnableToReadStreamPosition()
+    {
+        $stream = new Stream($this->resourceDevNull);
+        $this->expectException(RuntimeException::class);
+        $stream->tell();
+    }
+
     public function testReturnsOef()
     {
         $stream = new Stream($this->resource);
@@ -118,6 +134,13 @@ class StreamTest extends TestCase
         $this->assertEquals(10, ftell($this->resource));
     }
 
+    public function testSeekThrowsRuntimeExceptionWhenUnableToSeek()
+    {
+        $stream = new Stream($this->resourceDevNull);
+        $this->expectException(RuntimeException::class);
+        $stream->seek(10);
+    }
+
     public function testRewindReturnsToBeginning()
     {
         $stream = new Stream($this->resource);
@@ -126,6 +149,13 @@ class StreamTest extends TestCase
         $this->assertEquals(0, ftell($this->resource));
     }
 
+    public function testRewindThrowsRuntimeExceptionWhenUnableToRewind()
+    {
+        $stream = new Stream($this->resourceDevNull);
+        $this->expectException(RuntimeException::class);
+        $stream->rewind();
+    }
+
     public function testWritesToHandle()
     {
         $message = "\nThis is a stream.";
@@ -190,7 +220,12 @@ class StreamTest extends TestCase
         $this->assertEquals($metadata["mode"], $stream->getMetadata("mode"));
     }
 
-    /** @dataProvider modeProvider */
+    /**
+     * @dataProvider modeProvider
+     * @param string $mode Access type used to open the stream
+     * @param bool $readable The stream should be readable
+     * @param bool $writable The stream should be writeable
+     */
     public function testReturnsIsReadableForReadableStreams($mode, $readable, $writable)
     {
         $tmp = tempnam(sys_get_temp_dir(), "php");
@@ -202,7 +237,12 @@ class StreamTest extends TestCase
         $this->assertEquals($readable, $stream->isReadable());
     }
 
-    /** @dataProvider modeProvider */
+    /**
+     * @dataProvider modeProvider
+     * @param string $mode Access type used to open the stream
+     * @param bool $readable The stream should be readable
+     * @param bool $writable The stream should be writeable
+     */
     public function testReturnsIsWritableForWritableStreams($mode, $readable, $writable)
     {
         $tmp = tempnam(sys_get_temp_dir(), "php");