Add more test to improve codacy score

tests/Fixtures/inc/Engine/Media/PreconnectExternalDomains/AJAX/Controller/checkData.php

@@ -0,0 +1,53 @@
+<?php
+return [
+	'testShouldBailOutWhenNotAllowed' => [
+		'config'   => [
+			'url'       => 'http://example.org',
+			'is_mobile' => false,
+			'filter'    => false,
+			'row'       => (object) [
+				'domains' => json_encode( [
+					(object) [
+						'http://exampled-domain.ng/',
+						'http://exampled-domain.com',
+					],
+				] ),
+			],
+		],
+		'expected' => [
+			'result' => true,
+			'message' => true
+		],
+	],
+	'testShouldReturnSuccess' => [
+		'config'   => [
+			'url'       => 'http://example.org',
+			'is_mobile' => false,
+			'filter'    => true,
+			'row'       => (object) [
+				'domains' => json_encode( [
+					(object) [
+						'http://exampled-domain.ng/',
+						'http://exampled-domain.com',
+					],
+				] ),
+			],
+		],
+		'expected' => [
+			'result' => true,
+			'message' => true
+		],
+	],
+	'testShouldReturnError' => [
+		'config'   => [
+			'url'       => 'http://example.org',
+			'is_mobile' => false,
+			'row'       => false,
+			'filter'    => true,
+		],
+		'expected' => [
+			'result' => false,
+			'message' => false
+		],
+	],
+];

tests/Unit/inc/Engine/Media/PreconnectExternalDomains/AJAX/Controller/checkData.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace WP_Rocket\tests\Unit\inc\Engine\Media\PreconnectExternalDomains\AJAX\Controller;
+
+use WP_Rocket\Engine\Media\PreconnectExternalDomains\Context\Context;
+use WP_Rocket\Engine\Media\PreconnectExternalDomains\AJAX\Controller;
+use WP_Rocket\Engine\Media\PreconnectExternalDomains\Database\Queries\PreconnectExternalDomains;
+use WP_Rocket\Tests\Unit\TestCase;
+use Brain\Monkey\Functions;
+use Mockery;
+
+/**
+ * Test class covering WP_Rocket\Engine\Media\PreconnectExternalDomains\AJAX\Controller::check_data
+ *
+ * @group PreconnectExternalDomains
+ */
+class Test_CheckData extends TestCase {
+	private $query;
+	private $controller;
+
+	private $temp_post = [];
+
+	private $context;
+
+	protected function setUp(): void {
+		parent::setUp();
+		$this->query      = $this->createPartialMock( PreconnectExternalDomains::class, [ 'get_row' ] );
+		$this->context    = Mockery::mock( Context::class );
+		$this->controller = new Controller( $this->query, $this->context );
+		$this->temp_post  = $_POST;
+
+
+		$this->stubEscapeFunctions();
+	}
+
+	protected function tearDown(): void {
+		unset( $_POST );
+		$_POST = $this->temp_post;
+
+		parent::tearDown();
+	}
+
+	/**
+	 * @dataProvider configTestData
+	 */
+	public function testShouldReturnExpected( $config, $expected ) {
+		$this->stubEscapeFunctions();
+		$this->stubTranslationFunctions();
+
+		$_POST = [
+			'url'       => addslashes( $config['url'] ),
+			'is_mobile' => addslashes( $config['is_mobile'] ),
+		];
+
+		$this->context->shouldReceive( 'is_allowed' )
+			->atMost()
+			->once()
+			->andReturn( $config['filter'] );
+
+		Functions\expect( 'check_ajax_referer' )
+			->once()
+			->with( 'rocket_beacon', 'rocket_beacon_nonce' )
+			->andReturn( true );
+
+		Functions\when('esc_url_raw')->alias(
+			function( $url ){
+				return $url;
+			}
+		);
+
+		Functions\when( 'wp_unslash' )->alias(
+			function ( $value ) {
+				return is_string( $value ) ? stripslashes( $value ) : $value;
+			}
+		);
+
+		$this->query->method( 'get_row' )
+			->with( $config['url'], $config['is_mobile'] )
+			->willReturn( $config['row'] );
+
+		$this->assertSame( [ 'preconnect_external_domains' => $expected['message'] ], $this->controller->check_data() );
+	}
+}