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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/52383">52383</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/52383","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>2021-12-16 14:45:32 +0000 (Thu, 16 Dec 2021)</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: Add unit tests for theme features that block themes should support by default.

By default, block themes should have a few theme supports enabled:
* `post-thumbnails`
* `responsive-embeds`
* `editor-styles`
* `html5` for `comment-form`, `comment-list`, `style`, `script`
* `automatic-feed-links`

They should also load core block assets only when the blocks are rendered. This commit adds the associated tests.

Follow-up to <a href="https://core.trac.wordpress.org/changeset/52369">[52369]</a>.

Props costdev.
See <a href="https://core.trac.wordpress.org/ticket/54597">#54597</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesthemephp">trunk/src/wp-includes/theme.php</a></li>
<li><a href="#trunktestsphpunitteststhemewpThemephp">trunk/tests/phpunit/tests/theme/wpTheme.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesthemephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/theme.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/theme.php   2021-12-15 19:59:32 UTC (rev 52382)
+++ trunk/src/wp-includes/theme.php     2021-12-16 14:45:32 UTC (rev 52383)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4168,16 +4168,21 @@
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px">  * Adds default theme supports for block themes when the 'setup_theme' action fires.
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * See {@see 'setup_theme'}.
+ *
</ins><span class="cx" style="display: block; padding: 0 10px">  * @since 5.9.0
</span><span class="cx" style="display: block; padding: 0 10px">  * @access private
</span><span class="cx" style="display: block; padding: 0 10px">  */
</span><span class="cx" style="display: block; padding: 0 10px"> function _add_default_theme_supports() {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( wp_is_block_theme() ) {
-               add_theme_support( 'post-thumbnails' );
-               add_theme_support( 'responsive-embeds' );
-               add_theme_support( 'editor-styles' );
-               add_theme_support( 'html5', array( 'comment-form', 'comment-list', 'style', 'script' ) );
-               add_theme_support( 'automatic-feed-links' );
-               add_filter( 'should_load_separate_core_block_assets', '__return_true' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! wp_is_block_theme() ) {
+               return;
</ins><span class="cx" style="display: block; padding: 0 10px">         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       add_theme_support( 'post-thumbnails' );
+       add_theme_support( 'responsive-embeds' );
+       add_theme_support( 'editor-styles' );
+       add_theme_support( 'html5', array( 'comment-form', 'comment-list', 'style', 'script' ) );
+       add_theme_support( 'automatic-feed-links' );
+
+       add_filter( 'should_load_separate_core_block_assets', '__return_true' );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="trunktestsphpunitteststhemewpThemephp"></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/theme/wpTheme.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/theme/wpTheme.php       2021-12-15 19:59:32 UTC (rev 52382)
+++ trunk/tests/phpunit/tests/theme/wpTheme.php 2021-12-16 14:45:32 UTC (rev 52383)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -353,4 +353,135 @@
</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">+
+       /**
+        * Tests that block themes support a feature by default.
+        *
+        * @ticket 54597
+        * @dataProvider data_block_theme_has_default_support
+        *
+        * @covers ::_add_default_theme_supports
+        *
+        * @param array $support {
+        *     The feature to check.
+        *
+        *     @type string $feature     The feature to check.
+        *     @type string $sub_feature Optional. The sub-feature to check.
+        * }
+        */
+       public function test_block_theme_has_default_support( $support ) {
+               $this->helper_requires_block_theme();
+
+               $support_data     = array_values( $support );
+               $support_data_str = implode( ': ', $support_data );
+
+               // Remove existing support.
+               if ( current_theme_supports( ...$support_data ) ) {
+                       remove_theme_support( ...$support_data );
+               }
+
+               $this->assertFalse(
+                       current_theme_supports( ...$support_data ),
+                       "Could not remove support for $support_data_str."
+               );
+
+               do_action( 'setup_theme' );
+
+               $this->assertTrue(
+                       current_theme_supports( ...$support_data ),
+                       "Does not have default support for $support_data_str."
+               );
+       }
+
+       /**
+        * Data provider.
+        *
+        * @return array
+        */
+       public function data_block_theme_has_default_support() {
+               return array(
+                       'post-thumbnails'      => array(
+                               'support' => array(
+                                       'feature' => 'post-thumbnails',
+                               ),
+                       ),
+                       'responsive-embeds'    => array(
+                               'support' => array(
+                                       'feature' => 'responsive-embeds',
+                               ),
+                       ),
+                       'editor-styles'        => array(
+                               'support' => array(
+                                       'feature' => 'editor-styles',
+                               ),
+                       ),
+                       'html5: style'         => array(
+                               'support' => array(
+                                       'feature'     => 'html5',
+                                       'sub_feature' => 'style',
+                               ),
+                       ),
+                       'html5: script'        => array(
+                               'support' => array(
+                                       'feature'     => 'html5',
+                                       'sub_feature' => 'script',
+                               ),
+                       ),
+                       'automatic-feed-links' => array(
+                               'support' => array(
+                                       'feature' => 'automatic-feed-links',
+                               ),
+                       ),
+               );
+       }
+
+       /**
+        * Tests that block themes load separate core block assets by default.
+        *
+        * @ticket 54597
+        *
+        * @covers ::wp_should_load_separate_core_block_assets
+        */
+       public function test_block_theme_should_load_separate_core_block_assets_by_default() {
+               $this->helper_requires_block_theme();
+
+               add_filter( 'should_load_separate_core_block_assets', '__return_false' );
+
+               $this->assertFalse(
+                       wp_should_load_separate_core_block_assets(),
+                       'Could not disable loading separate core block assets.'
+               );
+
+               do_action( 'setup_theme' );
+
+               $this->assertTrue(
+                       wp_should_load_separate_core_block_assets(),
+                       'Block themes do not load separate core block assets by default.'
+               );
+       }
+
+       /**
+        * Helper function to ensure that a block theme is available and active.
+        */
+       private function helper_requires_block_theme() {
+               // No need to switch if we're already on a block theme.
+               if ( wp_is_block_theme() ) {
+                       return;
+               }
+
+               $block_theme        = 'twentytwentytwo';
+               $block_theme_object = new WP_Theme( $block_theme, WP_CONTENT_DIR . '/themes' );
+
+               // Skip if the block theme is not available.
+               if ( ! $block_theme_object->exists() ) {
+                       $this->markTestSkipped( "$block_theme must be available." );
+               }
+
+               switch_theme( $block_theme );
+
+               // Skip if we could not switch to the block theme.
+               if ( wp_get_theme()->stylesheet !== $block_theme ) {
+                       $this->markTestSkipped( "Could not switch to $block_theme." );
+               }
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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