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<title>[Tests][1182] trunk/tests/image: Add some tests for WP_Image_Editor_GD, specifically testing image alpha testing.</title>
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<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/1182/tests">1182</a></dd>
<dt>Author</dt> <dd>joehoyle</dd>
<dt>Date</dt> <dd>2013-01-04 10:56:13 +0000 (Fri, 04 Jan 2013)</dd>
</dl>
<h3>Log Message</h3>
<pre>Add some tests for WP_Image_Editor_GD, specifically testing image alpha testing. see <a href="http://core.trac.wordpress.org/ticket/23039">#23039</a></pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunktestsimagebasephp">trunk/tests/image/base.php</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunktestsimageeditor_gdphp">trunk/tests/image/editor_gd.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunktestsimagebasephp"></a>
<div class="modfile"><h4>Modified: trunk/tests/image/base.php (1181 => 1182)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/tests/image/base.php 2013-01-04 00:22:48 UTC (rev 1181)
+++ trunk/tests/image/base.php 2013-01-04 10:56:13 UTC (rev 1182)
</span><span class="lines">@@ -30,4 +30,21 @@
</span><span class="cx"> public function setEngine( $editors ) {
</span><span class="cx"> return array( $this->editor_engine );
</span><span class="cx"> }
</span><ins>+
+ /**
+ * Helper assertion for testing alpha on images
+ *
+ * @param string $image_path
+ * @param array $point array(x,y)
+ * @param int $alpha
+ */
+ protected function assertImageAlphaAtPoint( $image_path, $point, $alpha ) {
+
+ $im = imagecreatefrompng( $image_path );
+ $rgb = imagecolorat($im, $point[0], $point[1]);
+
+ $colors = imagecolorsforindex($im, $rgb);
+
+ $this->assertEquals( $alpha, $colors['alpha'] );
+ }
</ins><span class="cx"> }
</span></span></pre></div>
<a id="trunktestsimageeditor_gdphp"></a>
<div class="addfile"><h4>Added: trunk/tests/image/editor_gd.php (0 => 1182)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/tests/image/editor_gd.php (rev 0)
+++ trunk/tests/image/editor_gd.php 2013-01-04 10:56:13 UTC (rev 1182)
</span><span class="lines">@@ -0,0 +1,57 @@
</span><ins>+<?php
+
+/**
+ * Test the WP_Image_Editor_GD class
+ * @group image
+ * @group media
+ */
+
+class Tests_Image_Editor_GD extends WP_Image_UnitTestCase {
+ public $editor_engine = 'WP_Image_Editor_GD';
+
+ public function setup() {
+ require_once( ABSPATH . WPINC . '/class-wp-image-editor.php' );
+ require_once( ABSPATH . WPINC . '/class-wp-image-editor-gd.php' );
+ parent::setUp();
+ }
+
+ /**
+ * Test the image created with WP_Image_Edior_GD preserves alpha when resizing
+ *
+ * @ticket 23039
+ */
+ public function test_image_preserves_alpha_on_resize() {
+
+ $file = DIR_TESTDATA . '/images/transparent.png';
+
+ $editor = wp_get_image_editor( $file );
+ $editor->load();
+ $editor->resize(5,5);
+ $save_to_file = tempnam( get_temp_dir(), '' ) . '.png';
+
+ $editor->save( $save_to_file );
+
+ $this->assertImageAlphaAtPoint( $save_to_file, array( 0,0 ), 127 );
+
+ }
+
+ /**
+ * Test the image created with WP_Image_Edior_GD preserves alpha with no resizing etc
+ *
+ * @ticket 23039
+ */
+ public function test_image_preserves_alpha() {
+
+ $file = DIR_TESTDATA . '/images/transparent.png';
+
+ $editor = wp_get_image_editor( $file );
+ $editor->load();
+
+ $save_to_file = tempnam( get_temp_dir(), '' ) . '.png';
+
+ $editor->save( $save_to_file );
+
+ $this->assertImageAlphaAtPoint( $save_to_file, array( 0,0 ), 127 );
+ }
+
+}
</ins></span></pre>
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