Add AmpWPConfiguration test

tests/php/src/Optimizer/AmpWPConfigurationTest.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace AmpProject\AmpWP\Tests\Optimizer;
+
+use AmpProject\AmpWP\Optimizer\AmpWPConfiguration;
+use AmpProject\Optimizer\Configuration\PreloadHeroImageConfiguration;
+use AmpProject\Optimizer\Transformer\PreloadHeroImage;
+use AmpProject\Optimizer\Transformer\ServerSideRendering;
+use AmpProject\Optimizer\TransformerConfiguration;
+use WP_UnitTestCase;
+
+/** @coversDefaultClass \AmpProject\AmpWP\Optimizer\AmpWPConfiguration */
+final class AmpWPConfigurationTest extends WP_UnitTestCase {
+
+	/**
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::apply_filters()
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::get()
+	 */
+	public function test_get_unfiltered_configuration_key() {
+		$configuration = new AmpWPConfiguration();
+		$transformers  = $configuration->get( AmpWPConfiguration::KEY_TRANSFORMERS );
+
+		$this->assertContains( ServerSideRendering::class, $transformers );
+	}
+
+	/**
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::apply_filters()
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::get()
+	 */
+	public function test_get_filtered_configuration_key() {
+		add_filter( 'amp_enable_ssr', '__return_false' );
+
+		$configuration = new AmpWPConfiguration();
+		$transformers  = $configuration->get( AmpWPConfiguration::KEY_TRANSFORMERS );
+
+		$this->assertNotContains( ServerSideRendering::class, $transformers );
+
+		remove_filter( 'amp_enable_ssr', '__return_false' );
+	}
+
+	/**
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::apply_filters()
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::getTransformerConfiguration
+	 */
+	public function test_get_unfiltered_transformer_configuration_key() {
+		$configuration             = new AmpWPConfiguration();
+		$transformer_configuration = $configuration->getTransformerConfiguration( PreloadHeroImage::class );
+
+		$this->assertInstanceOf( TransformerConfiguration::class, $transformer_configuration );
+		$this->assertEquals(
+			'data-amp-original-style',
+			$transformer_configuration->get( PreloadHeroImageConfiguration::INLINE_STYLE_BACKUP_ATTRIBUTE )
+		);
+	}
+
+	/**
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::apply_filters()
+	 * @covers \AmpProject\AmpWP\Optimizer\AmpWPConfiguration::getTransformerConfiguration()
+	 */
+	public function test_get_filtered_transformer_configuration_key() {
+		$configuration_filter = static function ( $configuration ) {
+			$configuration[ PreloadHeroImage::class ]['inlineStyleBackupAttribute'] = 'data-backup-style';
+			return $configuration;
+		};
+
+		add_filter( 'amp_optimizer_config', $configuration_filter );
+
+		$configuration             = new AmpWPConfiguration();
+		$transformer_configuration = $configuration->getTransformerConfiguration( PreloadHeroImage::class );
+
+		$this->assertInstanceOf( TransformerConfiguration::class, $transformer_configuration );
+		$this->assertEquals(
+			'data-backup-style',
+			$transformer_configuration->get( PreloadHeroImageConfiguration::INLINE_STYLE_BACKUP_ATTRIBUTE )
+		);
+
+		remove_filter( 'amp_optimizer_config', $configuration_filter );
+	}
+}

tests/php/src/Optimizer/OptimizerServiceTest.php

@@ -20,7 +20,7 @@ final class OptimizerServiceTest extends TestCase {
 	 * @covers \AmpProject\AmpWP\Optimizer\OptimizerService::optimizeDom()
 	 * @covers \AmpProject\AmpWP\Optimizer\OptimizerService::optimizeHtml()
 	 */
-	public function testMethodForwarding() {
+	public function test_method_forwarding() {
 		$html                  = self::HERO_IMAGE_MARKUP . self::HERO_IMAGE_MARKUP . self::HERO_IMAGE_MARKUP;
 		$document              = Document::fromHtml( $html );
 		$transformation_engine = new TransformationEngine();