Editor: Restore the merging of TinyMCE settings in wp_tinymce_inline_scripts().

This ensures that the function applies the `wp_editor_settings` filter and merges the resulting array with the rest of TinyMCE init settings.

Includes a unit test to verify that the settings are merged correctly after adding the assignment of `array_merge()` result that was missed in the initial commit.

Follow-up to [44265], [59033].

Props kkmuffme, akshat2802, davidbaumwald, SergeyBiryukov.
Fixes #61754.

git-svn-id: https://develop.svn.wordpress.org/trunk@59074 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/script-loader.php

@@ -609,6 +609,10 @@ function wp_tinymce_inline_scripts() {
 		$tinymce_settings['wpeditimage_disable_captions'] = true;
 	}
 
+	if ( ! empty( $editor_settings['tinymce'] ) && is_array( $editor_settings['tinymce'] ) ) {
+		$tinymce_settings = array_merge( $tinymce_settings, $editor_settings['tinymce'] );
+	}
+
 	/** This filter is documented in wp-includes/class-wp-editor.php */
 	$tinymce_settings = apply_filters( 'tiny_mce_before_init', $tinymce_settings, 'classic-block' );
 

tests/phpunit/tests/editor/wpTinyMceInlineScripts.php

@@ -0,0 +1,39 @@
+<?php
+/**
+ * @group editor
+ *
+ * @covers ::wp_tinymce_inline_scripts
+ */
+class Tests_Editor_wpTinyMceInlineScripts extends WP_UnitTestCase {
+
+	/**
+	 * Tests that the function applies the `wp_editor_settings` filter
+	 * and merges the resulting array with the rest of TinyMCE init settings.
+	 *
+	 * @ticket 61754
+	 */
+	public function test_wp_tinymce_inline_scripts_array_merge() {
+		$merged_settings = array();
+
+		add_filter(
+			'wp_editor_settings',
+			static function ( $settings ) {
+				$settings['tinymce'] = array( 'wp_autoresize_on' => true );
+				return $settings;
+			}
+		);
+
+		add_filter(
+			'tiny_mce_before_init',
+			static function ( $tinymce_settings ) use ( &$merged_settings ) {
+				$merged_settings = $tinymce_settings;
+				return $tinymce_settings;
+			}
+		);
+
+		wp_scripts();
+		wp_tinymce_inline_scripts();
+
+		$this->assertArrayHasKey( 'wp_autoresize_on', $merged_settings );
+	}
+}