Add tests

tests/phpunit/data/themedir2/test-parent/functions.php

@@ -0,0 +1,7 @@
+<?php
+
+// Dummy theme.
+
+echo __DIR__ . '/' . basename(__FILE__);
+
+?>

tests/phpunit/data/themedir2/test-parent/index.php

@@ -0,0 +1,7 @@
+<?php
+
+// Dummy theme.
+
+echo __DIR__ . '/' . basename(__FILE__);
+
+?>

tests/phpunit/data/themedir2/test-parent/style.css

@@ -0,0 +1,12 @@
+/*
+Theme Name: Test Parent Theme
+Theme URI: http://example.org/
+Description: An example parent theme
+Version: 1.3
+Author: Minnie Bannister
+Author URI: http://example.com/
+Template: test-parent
+*/
+
+
+

tests/phpunit/data/themedir2/test/functions.php

@@ -0,0 +1,7 @@
+<?php
+
+// Dummy theme.
+
+echo __DIR__ . '/' . basename(__FILE__);
+
+?>

tests/phpunit/data/themedir2/test/index.php

@@ -0,0 +1,7 @@
+<?php
+
+// Dummy theme.
+
+echo __DIR__ . '/' . basename(__FILE__);
+
+?>

tests/phpunit/data/themedir2/test/style.css

@@ -0,0 +1,12 @@
+/*
+Theme Name: Test Theme
+Theme URI: http://example.org/
+Description: An example theme
+Version: 1.3
+Author: Minnie Bannister
+Author URI: http://example.com/
+Template: test-parent
+*/
+
+
+

tests/phpunit/tests/theme.php

@@ -1179,4 +1179,118 @@ private function helper_requires_block_theme() {
 			$this->markTestSkipped( "Could not switch to $block_theme." );
 		}
 	}
+
+	/**
+	 * Make sure filters added after the initial call are fired.
+	 *
+	 * @ticket 59847
+	 */
+	public function test_get_stylesheet_directory_filters_apply() {
+		// Call the function prior to the filter being added.
+		get_stylesheet_directory();
+
+		$expected = 'test_root/dir';
+
+		// Add the filer.
+		add_filter(
+			'stylesheet_directory',
+			function () use ( $expected ) {
+				return $expected;
+			}
+		);
+
+		$this->assertSame( $expected, get_stylesheet_directory() );
+	}
+
+	/**
+	 * Make sure filters added after the initial call are fired.
+	 *
+	 * @ticket 59847
+	 */
+	public function test_get_template_directory_filters_apply() {
+		// Call the function prior to the filter being added.
+		get_template_directory();
+
+		$expected = 'test_root/dir';
+
+		// Add the filer.
+		add_filter(
+			'template_directory',
+			function () use ( $expected ) {
+				return $expected;
+			}
+		);
+
+		$this->assertSame( $expected, get_template_directory() );
+	}
+
+	/**
+	 * @ticket 59847
+	 */
+	public function test_get_stylesheet_directory_uses_registered_theme_dir() {
+		$old_theme = wp_get_theme();
+
+		switch_theme( 'test' );
+
+		$old_root = get_theme_root( 'test' );
+		$path1    = get_stylesheet_directory();
+
+		$new_root = DIR_TESTDATA . '/themedir2';
+		register_theme_directory( $new_root );
+
+		// Mock the stylesheet root option to mimic that the active root has changed.
+		add_filter(
+			'pre_option_stylesheet_root',
+			function () use ( $new_root ) {
+				return $new_root;
+			}
+		);
+
+		$path2 = get_stylesheet_directory();
+
+		// Cleanup.
+		switch_theme( $old_theme->get_stylesheet() );
+
+		$this->assertEquals( $old_root . '/test', $path1, 'The original stylesheet path is not correct' );
+		$this->assertEquals( $new_root . '/test', $path2, 'The new stylesheet path is not correct' );
+	}
+
+	/**
+	 * @ticket 59847
+	 */
+	public function test_get_template_directory_uses_registered_theme_dir() {
+		$old_theme = wp_get_theme();
+
+		switch_theme( 'test' );
+
+		// Mock parent theme to be returned as the template.
+		add_filter(
+			'pre_option_template',
+			function () {
+				return 'test-parent';
+			}
+		);
+
+		$old_root = get_theme_root( 'test' );
+		$path1    = get_template_directory();
+
+		$new_root = DIR_TESTDATA . '/themedir2';
+		register_theme_directory( $new_root );
+
+		// Mock the template root option to mimic that the active root has changed.
+		add_filter(
+			'pre_option_template_root',
+			function () use ( $new_root ) {
+				return $new_root;
+			}
+		);
+
+		$path2 = get_template_directory();
+
+		// Cleanup.
+		switch_theme( $old_theme->get_stylesheet() );
+
+		$this->assertEquals( $old_root . '/test-parent', $path1, 'The original template path is not correct' );
+		$this->assertEquals( $new_root . '/test-parent', $path2, 'The new template path is not correct' );
+	}
 }