Add unit test

phpunit/block-supports/aria-label-test.php

@@ -0,0 +1,85 @@
+<?php
+/**
+ * Test the aria-label block support.
+ *
+ * @package Gutenberg
+ */
+class WP_Block_Supports_Aria_Label_Test extends WP_UnitTestCase {
+	/**
+	 * @var string|null
+	 */
+	private $test_block_name;
+
+	public function set_up() {
+		parent::set_up();
+		$this->test_block_name = null;
+	}
+
+	public function tear_down() {
+		unregister_block_type( $this->test_block_name );
+		$this->test_block_name = null;
+		parent::tear_down();
+	}
+
+	/**
+	 * Registers a new block for testing aria-label support.
+	 *
+	 * @param string $block_name Name for the test block.
+	 * @param array  $supports   Array defining block support configuration.
+	 *
+	 * @return WP_Block_Type The block type for the newly registered test block.
+	 */
+	private function register_aria_label_block_with_support( $block_name, $supports = array() ) {
+		$this->test_block_name = $block_name;
+		register_block_type(
+			$this->test_block_name,
+			array(
+				'api_version' => 3,
+				'supports'    => $supports,
+			)
+		);
+		$registry = WP_Block_Type_Registry::get_instance();
+
+		return $registry->get_registered( $this->test_block_name );
+	}
+
+	/**
+	 * Tests that position block support works as expected.
+	 *
+	 * @dataProvider data_aria_label_block_support
+	 *
+	 * @param boolean|array $support Aria label block support configuration.
+	 * @param string        $value   Aria label value for attribute object.
+	 * @param array         $expected       Expected aria label block support styles.
+	 */
+	public function test_gutenberg_apply_aria_label_support( $support, $value, $expected ) {
+		$block_type  = self::register_aria_label_block_with_support(
+			'test/aria-label-block',
+			array( 'ariaLabel' => $support )
+		);
+		$block_attrs = array( 'ariaLabel' => $value );
+		$actual      = gutenberg_apply_aria_label_support( $block_type, $block_attrs );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array
+	 */
+	public function data_aria_label_block_support() {
+		return array(
+			'aria-label attribute is applied' => array(
+				'support'  => true,
+				'value'    => 'Label',
+				'expected' => array( 'aria-label' => 'Label' ),
+			),
+			'aria-label attribute is not applied if block does not support it' => array(
+				'support'  => false,
+				'value'    => 'Label',
+				'expected' => array(),
+			),
+		);
+	}
+}