Added unit test for post excerpt block render function (WordPress#43451)

* Added unittest for post excerpt block render function

* Updated wpSetUpBeforeClass method with argument

* Addressed feedbacks

* fix unit test failure

* Fix coding standards

* Fix phpcs issue

* Update config to allow files with new name standard

* Change test file name to camel case

* Update assertion comments and formatting

---------

Co-authored-by: Sunil Prajapati <61308756+sunil25393@users.noreply.github.com>

Co-authored-by: akasunil <sunil25393@git.wordpress.org>
Co-authored-by: anton-vlasenko <antonvlasenko@git.wordpress.org>

phpunit.xml.dist

@@ -14,6 +14,7 @@
 		<testsuite name="default">
 			<directory suffix="-test.php">./phpunit/</directory>
 			<directory suffix=".php">./phpunit/tests/</directory>
+			<directory suffix=".php">./phpunit/blocks/</directory>
 		</testsuite>
 	</testsuites>
 	<groups>

phpunit/blocks/renderBlockCorePostExcerpt.php

@@ -0,0 +1,147 @@
+<?php
+/**
+ * Tests for the gutenberg_render_block_core_post_excerpt() function.
+ *
+ * @package WordPress
+ * @subpackage Blocks
+ *
+ * @covers ::gutenberg_render_block_core_post_excerpt
+ * @group blocks
+ */
+class Tests_Blocks_RenderBlockCorePostExcerpt extends WP_UnitTestCase {
+
+	/**
+	 * Post object with data.
+	 *
+	 * @var array
+	 */
+	protected static $post;
+
+	/**
+	 * Array of Attributes.
+	 *
+	 * @var int
+	 */
+	protected static $attributes;
+
+	/**
+	 * Setup method.
+	 *
+	 * @param WP_UnitTest_Factory $factory Helper that lets us create fake data.
+	 */
+	public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
+
+		self::$post = $factory->post->create_and_get(
+			array(
+				'post_title'   => 'Post Expert block Unit Test',
+				'post_excerpt' => 'Post Expert content',
+			)
+		);
+
+		self::$attributes = array(
+			'moreText'      => '',
+			'excerptLength' => 55,
+		);
+
+		$block = array(
+			'blockName'    => 'core/post-excerpt',
+			'attrs'        => array(
+				'moreText' => '',
+			),
+			'innerBlock'   => array(),
+			'innerContent' => array(),
+			'innerHTML'    => array(),
+		);
+
+		WP_Block_Supports::init();
+		WP_Block_Supports::$block_to_render = $block;
+	}
+
+	/**
+	 * Tear down method.
+	 */
+	public static function wpTearDownAfterClass() {
+		wp_delete_post( self::$post->ID, true );
+	}
+
+	/**
+	 * Test gutenberg_render_block_core_post_excerpt() method
+	 * with empty data.
+	 */
+	public function test_should_render_empty_string_when_excerpt_is_empty() {
+		$block = new stdClass();
+
+		// call render method with block context.
+		$rendered = gutenberg_render_block_core_post_excerpt( self::$attributes, '', $block );
+		$this->assertSame( '', $rendered, 'Failed to assert that $rendered is an empty string.' );
+	}
+
+	/**
+	 * Test gutenberg_render_block_core_post_excerpt() method.
+	 */
+	public function test_should_render_correct_exceprt() {
+
+		$block           = new stdClass();
+		$GLOBALS['post'] = self::$post;
+		$block->context  = array( 'postId' => self::$post->ID );
+
+		$rendered = gutenberg_render_block_core_post_excerpt( self::$attributes, '', $block );
+		$this->assertNotEmpty( $rendered, 'Failed to assert that $rendered is not empty.' );
+		$this->assertStringContainsString(
+			'Post Expert content',
+			$rendered,
+			'Failed to assert that $rendered contain the expected string.'
+		);
+		$this->assertStringContainsString(
+			'</p',
+			$rendered,
+			'Failed to assert that $rendered contains a closing html paragraph tag.'
+		);
+		$this->assertStringContainsString(
+			'wp-block-post-excerpt__excerpt',
+			$rendered,
+			'Failed to assert that $rendered contain the "wp-block-post-excerpt__excerpt" string.'
+		);
+		$this->assertStringNotContainsString(
+			'has-text-align',
+			$rendered,
+			'Failed to assert that $rendered  does not contain the has-text-align class.'
+		);
+
+		self::$attributes['textAlign'] = 'left';
+
+		$rendered = gutenberg_render_block_core_post_excerpt( self::$attributes, '', $block );
+		$this->assertStringContainsString(
+			'has-text-align-left',
+			$rendered,
+			'Failed to assert that $rendered contains the "has-text-align-left" class.'
+		);
+
+		self::$attributes = array(
+			'moreText'      => 'Read More',
+			'excerptLength' => 55,
+		);
+
+		$rendered = gutenberg_render_block_core_post_excerpt( self::$attributes, '', $block );
+		$this->assertStringContainsString(
+			'wp-block-post-excerpt__more-link',
+			$rendered,
+			'Failed to assert that $rendered contains the expected string.'
+		);
+
+		self::$attributes = array(
+			'moreText'          => 'Read More',
+			'showMoreOnNewLine' => true,
+		);
+		$this->assertStringContainsString(
+			'wp-block-post-excerpt__more-link',
+			$rendered,
+			'Failed to assert that $rendered contains the expected string.'
+		);
+		$this->assertStringContainsString(
+			get_permalink( self::$post->ID ),
+			$rendered,
+			'Failed to assert that $rendered contain expected post the expected post URL.'
+		);
+	}
+}