Add native block-editor support

• Add wp-scripts for build
• Enqueue script, excluding it from widget block editor
• Localize script with configurable/filterable options
• Localize script with titles for post types to match current functionality
• Register meta and set sanitization callbacks
• Allow meta to be accessed via endpoint
• Create sidebar plugin to show the two fields used by the plugin

tests/test-class-external-permalinks-redux-block-editor.php

@@ -17,7 +17,43 @@ class TestClassExternalPermalinksReduxBlockEditor extends WP_UnitTestCase {
 	 * @covers ::register_meta()
 	 */
 	public function test_register_meta() {
-		$this->markTestIncomplete( 'This test has not been implemented.' );
+		global $wp_meta_keys;
+
+		$wp_meta_keys = null;
+
+		$this->assertFalse(
+			registered_meta_key_exists(
+				'post',
+				external_permalinks_redux::get_instance()->meta_key_target
+			),
+			'Failed to assert that "target" meta key is not registered.'
+		);
+
+		$this->assertFalse(
+			registered_meta_key_exists(
+				'post',
+				external_permalinks_redux::get_instance()->meta_key_type
+			),
+			'Failed to assert that "type" meta key is not registered.'
+		);
+
+		External_Permalinks_Redux_Block_Editor::get_instance()->register_meta();
+
+		$this->assertTrue(
+			registered_meta_key_exists(
+				'post',
+				external_permalinks_redux::get_instance()->meta_key_target
+			),
+			'Failed to assert that "target" meta key is registered.'
+		);
+
+		$this->assertTrue(
+			registered_meta_key_exists(
+				'post',
+				external_permalinks_redux::get_instance()->meta_key_type
+			),
+			'Failed to assert that "type" meta key is registered.'
+		);
 	}
 
 	/**
@@ -26,7 +62,41 @@ class TestClassExternalPermalinksReduxBlockEditor extends WP_UnitTestCase {
 	 * @covers ::allow_meta_updates()
 	 */
 	public function test_allow_meta_updates() {
-		$this->markTestIncomplete( 'This test has not been implemented.' );
+		$this->assertTrue(
+			External_Permalinks_Redux_Block_Editor::get_instance()->allow_meta_updates(
+				true,
+				'_a_random_key',
+				'term'
+			),
+			'Failed to assert that a term\'s key is not modified..'
+		);
+
+		$this->assertTrue(
+			External_Permalinks_Redux_Block_Editor::get_instance()->allow_meta_updates(
+				true,
+				'_a_random_key',
+				'post'
+			),
+			'Failed to assert that unrelated key\'s protection is not modified.'
+		);
+
+		$this->assertFalse(
+			External_Permalinks_Redux_Block_Editor::get_instance()->allow_meta_updates(
+				true,
+				external_permalinks_redux::get_instance()->meta_key_target,
+				'post'
+			),
+			'Failed to assert that "target" key is not protected.'
+		);
+
+		$this->assertFalse(
+			External_Permalinks_Redux_Block_Editor::get_instance()->allow_meta_updates(
+				true,
+				external_permalinks_redux::get_instance()->meta_key_type,
+				'post'
+			),
+			'Failed to assert that "type" key is not protected.'
+		);
 	}
 
 	/**
@@ -35,6 +105,24 @@ class TestClassExternalPermalinksReduxBlockEditor extends WP_UnitTestCase {
 	 * @covers ::enqueue()
 	 */
 	public function test_enqueue() {
-		$this->markTestIncomplete( 'This test has not been implemented.' );
+		$asset_handle = $asset_handle = 'external-permalinks-redux';
+
+		$this->assertFalse(
+			wp_script_is( $asset_handle, 'enqueued' ),
+			'Failed to assert that script is not enqueued.'
+		);
+
+		External_Permalinks_Redux_Block_Editor::get_instance()->enqueue();
+
+		$this->assertTrue(
+			wp_script_is( $asset_handle, 'enqueued' ),
+			'Failed to assert that script is enqueued.'
+		);
+
+		$this->assertStringContainsString(
+			'externalPermalinksReduxConfig',
+			wp_scripts()->get_data( $asset_handle, 'data' ),
+			'Failed to assert that configuration data is added.'
+		);
 	}
 }