Reset wp_styles after each test

Author: Sarthak Jaiswal

plugins/dominant-color-images/tests/data/class-testcase.php

@@ -5,6 +5,31 @@
 use WP_UnitTestCase;
 
 abstract class TestCase extends WP_UnitTestCase {
+
+	/**
+	 * Runs the routine before each test is executed.
+	 */
+	public function set_up(): void {
+		parent::set_up();
+		$this->reset_wp_dependencies();
+	}
+
+	/**
+	 * After a test method runs, resets any state in WordPress the test method might have changed.
+	 */
+	public function tear_down(): void {
+		parent::tear_down();
+		$this->reset_wp_dependencies();
+	}
+
+	/**
+	 * Reset WP_Scripts and WP_Styles.
+	 */
+	private function reset_wp_dependencies(): void {
+		$GLOBALS['wp_scripts'] = null;
+		$GLOBALS['wp_styles']  = null;
+	}
+
 	/**
 	 * Data provider for test_get_dominant_color_GD.
 	 *

plugins/dominant-color-images/tests/test-dominant-color.php

@@ -480,9 +480,8 @@ public function test_dominant_color_admin_inline_style(): void {
 	 * @covers ::dominant_color_admin_script
 	 */
 	public function test_dominant_color_admin_script(): void {
-		ob_start();
-		dominant_color_admin_script();
-		$output = ob_get_clean();
+
+		$output = get_echo( 'dominant_color_admin_script' );
 
 		// Verify if script tag exists.
 		$this->assertStringEndsWith( '</script>', trim( $output ) );