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<?php

namespace Mermaid\Tests;

use Mermaid\HookRegistry;
use Title;

/**
 * @covers \Mermaid\HookRegistry
 * @group mermaid
 *
 * @license GNU GPL v2+
 * @since 1.0
 *
 * @author mwjames
 */
class HookRegistryTest extends \PHPUnit_Framework_TestCase {

	public function testCanConstruct() {

		$this->assertInstanceOf(
			HookRegistry::class,
			new HookRegistry()
		);
	}

	public function testRegister() {

		$title = Title::newFromText( __METHOD__ );

		$parserOutput = $this->getMockBuilder( '\ParserOutput' )
			->disableOriginalConstructor()
			->getMock();

		$parser = $this->getMockBuilder( '\Parser' )
			->disableOriginalConstructor()
			->getMock();

		$parser->expects( $this->any() )
			->method( 'getTitle' )
			->will( $this->returnValue( $title ) );

		$parser->expects( $this->any() )
			->method( 'getOutput' )
			->will( $this->returnValue( $parserOutput ) );

		$instance = new HookRegistry();
		$instance->deregister();
		$instance->register();

		$this->doTestParserFirstCallInit( $instance, $parser );
		$this->doTestResourceLoaderGetConfigVars( $instance );
		$this->doTestOutputPageParserOutput( $instance );
	}

	public function doTestParserFirstCallInit( $instance, $parser ) {

		$handler = 'ParserFirstCallInit';

		$this->assertTrue(
			$instance->isRegistered( $handler )
		);

		$this->assertThatHookIsExcutable(
			$instance->getHandlerFor( $handler ),
			array( &$parser )
		);
	}

	public function doTestResourceLoaderGetConfigVars( $instance ) {

		$handler = 'ResourceLoaderGetConfigVars';

		$this->assertTrue(
			$instance->isRegistered( $handler )
		);

		$vars = array();

		$this->assertThatHookIsExcutable(
			$instance->getHandlerFor( $handler ),
			array( &$vars )
		);
	}

	public function doTestOutputPageParserOutput( $instance ) {

		$parserOutput = $this->getMockBuilder( '\ParserOutput' )
			->disableOriginalConstructor()
			->getMock();

		$parserOutput->expects( $this->any() )
			->method( 'getExtensionData' )
			->will( $this->returnValue( true ) );

		$outputPage = $this->getMockBuilder( '\OutputPage' )
			->disableOriginalConstructor()
			->getMock();

		$handler = 'OutputPageParserOutput';

		$this->assertTrue(
			$instance->isRegistered( $handler )
		);

		$this->assertThatHookIsExcutable(
			$instance->getHandlerFor( $handler ),
			array( $outputPage, $parserOutput )
		);
	}

	private function assertThatHookIsExcutable( \Closure $handler, $arguments ) {
		$this->assertInternalType(
			'boolean',
			call_user_func_array( $handler, $arguments )
		);
	}

}