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<title>[53531] trunk/tests/phpunit/tests/image/functions.php: Tests: Refactor `Tests_Image_Functions::test_inferred_mime_types()` to use a data provider.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/53531">53531</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/53531","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2022-06-19 17:10:48 +0000 (Sun, 19 Jun 2022)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Tests: Refactor `Tests_Image_Functions::test_inferred_mime_types()` to use a data provider.

Using a data provider has a number of advantages:
1. If the first test case fails, it won't prevent the other test cases from being tested.
2. The output from PHPUnit will be more descriptive in case of failure when using a data provider.
3. Using named test cases in the data provider will also make the `--testdox` output much more descriptive and informative.

The actual cases being tested, or the test itself have not been changed.

Includes:
* Adding a `@covers` annotation.
* Adding a failure message to each assertion.
* Adding a skip annotation for unsupported mime types.
* Making the test method name more specific.

Follow-up to [1061/tests], <a href="https://core.trac.wordpress.org/changeset/53495">[53495]</a>, <a href="https://core.trac.wordpress.org/changeset/53497">[53497]</a>, <a href="https://core.trac.wordpress.org/changeset/53521">[53521]</a>, <a href="https://core.trac.wordpress.org/changeset/53523">[53523]</a>, <a href="https://core.trac.wordpress.org/changeset/53524">[53524]</a>, <a href="https://core.trac.wordpress.org/changeset/53525">[53525]</a>, <a href="https://core.trac.wordpress.org/changeset/53526">[53526]</a>, <a href="https://core.trac.wordpress.org/changeset/53529">[53529]</a>, <a href="https://core.trac.wordpress.org/changeset/53530">[53530]</a>.

Props jrf.
See <a href="https://core.trac.wordpress.org/ticket/55652">#55652</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunktestsphpunittestsimagefunctionsphp">trunk/tests/phpunit/tests/image/functions.php</a></li>
</ul>

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<h3>Diff</h3>
<a id="trunktestsphpunittestsimagefunctionsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/image/functions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/image/functions.php     2022-06-19 16:51:49 UTC (rev 53530)
+++ trunk/tests/phpunit/tests/image/functions.php       2022-06-19 17:10:48 UTC (rev 53531)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -267,9 +267,11 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        );
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                // Save the file.
</ins><span class="cx" style="display: block; padding: 0 10px">                 $file = wp_tempnam();
</span><span class="cx" style="display: block; padding: 0 10px">                $ret  = wp_save_image_file( $file, $img, $mime_type, 1 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                // Make assertions.
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->assertNotEmpty( $ret, 'Image failed to save - "empty" response returned' );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertNotWPError( $ret, 'Image failed to save - WP_Error returned' );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSame( $mime_type, $this->get_mime_type( $ret['path'] ), 'Mime type of the saved image does not match' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -317,7 +319,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><span class="cx" style="display: block; padding: 0 10px">         * Test that a passed mime type overrides the extension in the filename when saving an image.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         * @dataProvider data_mime_overrides_filename
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * @dataProvider data_mime_overrides_filename_when_saving_an_image
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><span class="cx" style="display: block; padding: 0 10px">         * @ticket 6821
</span><span class="cx" style="display: block; padding: 0 10px">         * @covers WP_Image_Editor::get_mime_type
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -351,17 +353,62 @@
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @return array
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function data_mime_overrides_filename() {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function data_mime_overrides_filename_when_saving_an_image() {
</ins><span class="cx" style="display: block; padding: 0 10px">                 return $this->text_array_to_dataprovider( $this->get_image_editor_engine_classes() );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         * Test that mime types are correctly inferred from file extensions
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * Test that mime types are correctly inferred from file extensions when saving an image.
</ins><span class="cx" style="display: block; padding: 0 10px">          *
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @dataProvider data_inferred_mime_types_when_saving_an_image
+        *
</ins><span class="cx" style="display: block; padding: 0 10px">          * @ticket 6821
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         * @covers WP_Image_Editor::get_mime_type
+        * @covers WP_Image_Editor::get_output_format
</ins><span class="cx" style="display: block; padding: 0 10px">          * @requires extension fileinfo
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         *
+        * @param string $class_name Name of the image editor engine class to be tested.
+        * @param string $extension  File extension.
+        * @param string $mime_type  The mime type to test.
</ins><span class="cx" style="display: block; padding: 0 10px">          */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        public function test_inferred_mime_types() {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function test_inferred_mime_types_when_saving_an_image( $class_name, $extension, $mime_type ) {
+               $img    = new $class_name( DIR_TESTDATA . '/images/canola.jpg' );
+               $loaded = $img->load();
+
+               $img = wp_get_image_editor( DIR_TESTDATA . '/images/canola.jpg' );
+               $this->assertNotWPError( $img );
+
+               if ( ! $img->supports_mime_type( $mime_type ) ) {
+                       $this->markTestSkipped(
+                               sprintf(
+                                       'The %s mime type is not supported by the %s engine',
+                                       $mime_type,
+                                       str_replace( 'WP_Image_Editor_', '', $class_name )
+                               )
+                       );
+               }
+
+               // Save the file.
+               $temp = get_temp_dir();
+               $file = wp_unique_filename( $temp, uniqid() . ".$extension" );
+               $ret  = $img->save( trailingslashit( $temp ) . $file );
+
+               // Make assertions.
+               $this->assertNotEmpty( $ret, 'Image failed to save - "empty" response returned' );
+               $this->assertNotWPError( $ret, 'Image failed to save - WP Error returned' );
+               $this->assertSame( $mime_type, $this->get_mime_type( $ret['path'] ), 'Mime type of the saved image was not inferred correctly' );
+
+               // Clean up.
+               unlink( $ret['path'] );
+               unset( $img );
+       }
+
+       /**
+        * Data provider.
+        *
+        * @return array
+        */
+       public function data_inferred_mime_types_when_saving_an_image() {
</ins><span class="cx" style="display: block; padding: 0 10px">                 $classes = $this->get_image_editor_engine_classes();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // Mime types.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -372,35 +419,22 @@
</span><span class="cx" style="display: block; padding: 0 10px">                        'gif'  => 'image/gif',
</span><span class="cx" style="display: block; padding: 0 10px">                        'png'  => 'image/png',
</span><span class="cx" style="display: block; padding: 0 10px">                        'webp' => 'image/webp',
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'unk'  => 'image/jpeg',   // Default, unknown.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'unk'  => 'image/jpeg', // Default, unknown.
</ins><span class="cx" style="display: block; padding: 0 10px">                 );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                // Test each image editor engine.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $data = array();
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 foreach ( $classes as $class ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $img    = new $class( DIR_TESTDATA . '/images/canola.jpg' );
-                       $loaded = $img->load();
-
-                       // Save the image as each file extension, check the mime type.
-                       $img = wp_get_image_editor( DIR_TESTDATA . '/images/canola.jpg' );
-                       $this->assertNotWPError( $img );
-
-                       $temp = get_temp_dir();
</del><span class="cx" style="display: block; padding: 0 10px">                         foreach ( $mime_types as $ext => $mime_type ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                if ( ! $img->supports_mime_type( $mime_type ) ) {
-                                       continue;
-                               }
-
-                               $file = wp_unique_filename( $temp, uniqid() . ".$ext" );
-                               $ret  = $img->save( trailingslashit( $temp ) . $file );
-                               $this->assertNotEmpty( $ret );
-                               $this->assertNotWPError( $ret );
-                               $this->assertSame( $mime_type, $this->get_mime_type( $ret['path'] ) );
-                               unlink( $ret['path'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         $data[ $class . '; Extension: ' . $ext . '; Mime type: ' . $mime_type ] = array(
+                                       'class_name' => $class,
+                                       'extension'  => $ext,
+                                       'mime_type'  => $mime_type,
+                               );
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        // Clean up.
-                       unset( $img );
-               }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         return $data;
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        /**
</span></span></pre>
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