class UpdateFetcherTest

class UpdateFetcherTest extends UnitTestCase {
    
    /**
     * The update fetcher to use.
     *
     * @var \Drupal\update\UpdateFetcher
     */
    protected $updateFetcher;
    
    /**
     * History of requests/responses.
     *
     * @var array
     */
    protected $history = [];
    
    /**
     * Mock HTTP client.
     *
     * @var \GuzzleHttp\ClientInterface
     */
    protected $mockHttpClient;
    
    /**
     * Mock config factory.
     *
     * @var \Drupal\Core\Config\ConfigFactoryInterface
     */
    protected $mockConfigFactory;
    
    /**
     * A test project to fetch with.
     *
     * @var array
     */
    protected $testProject;
    
    /**
     * The logger.
     *
     * @var \Psr\Log\LoggerInterface
     */
    protected LoggerInterface $logger;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->mockConfigFactory = $this->getConfigFactoryStub([
            'update.settings' => [
                'fetch_url' => 'http://www.example.com',
            ],
        ]);
        $this->mockHttpClient = $this->createMock('\\GuzzleHttp\\ClientInterface');
        $settings = new Settings([]);
        $this->logger = new TestLogger();
        $this->updateFetcher = new UpdateFetcher($this->mockConfigFactory, $this->mockHttpClient, $settings, $this->logger);
        $this->testProject = [
            'name' => 'update_test',
            'project_type' => '',
            'info' => [
                'version' => '',
                'project status url' => 'https://www.example.com',
            ],
            'includes' => [
                'module1' => 'Module 1',
                'module2' => 'Module 2',
            ],
        ];
    }
    
    /**
     * Tests that buildFetchUrl() builds the URL correctly.
     *
     * @param array $project
     *   A keyed array of project information matching results from
     *   \Drupal\update\UpdateManager::getProjects().
     * @param string $site_key
     *   A string to mimic an anonymous site key hash.
     * @param string $expected
     *   The expected URL returned from UpdateFetcher::buildFetchUrl()
     *
     * @dataProvider providerTestUpdateBuildFetchUrl
     *
     * @see \Drupal\update\UpdateFetcher::buildFetchUrl()
     */
    public function testUpdateBuildFetchUrl(array $project, $site_key, $expected) : void {
        $url = $this->updateFetcher
            ->buildFetchUrl($project, $site_key);
        $this->assertEquals($url, $expected);
        $this->assertFalse($this->logger
            ->hasErrorRecords());
    }
    
    /**
     * Provide test data for self::testUpdateBuildFetchUrl().
     *
     * @return array
     *   An array of arrays, each containing:
     *   - 'project' - An array matching a project's .info file structure.
     *   - 'site_key' - An arbitrary site key.
     *   - 'expected' - The expected URL from UpdateFetcher::buildFetchUrl().
     */
    public static function providerTestUpdateBuildFetchUrl() {
        $data = [];
        // First test that we didn't break the trivial case.
        $project['name'] = 'update_test';
        $project['project_type'] = '';
        $project['info']['version'] = '';
        $project['info']['project status url'] = 'http://www.example.com';
        $project['includes'] = [
            'module1' => 'Module 1',
            'module2' => 'Module 2',
        ];
        $site_key = '';
        $expected = "http://www.example.com/{$project['name']}/current";
        $data[] = [
            $project,
            $site_key,
            $expected,
        ];
        // For uninstalled projects it shouldn't add the site key either.
        $site_key = 'site_key';
        $project['project_type'] = 'disabled';
        $expected = "http://www.example.com/{$project['name']}/current";
        $data[] = [
            $project,
            $site_key,
            $expected,
        ];
        // For installed projects, test adding the site key.
        $project['project_type'] = '';
        $expected = "http://www.example.com/{$project['name']}/current";
        $expected .= '?site_key=site_key';
        $expected .= '&list=' . rawurlencode('module1,module2');
        $data[] = [
            $project,
            $site_key,
            $expected,
        ];
        // Test when the URL contains a question mark.
        $project['info']['project status url'] = 'http://www.example.com/?project=';
        $expected = "http://www.example.com/?project=/{$project['name']}/current";
        $expected .= '&site_key=site_key';
        $expected .= '&list=' . rawurlencode('module1,module2');
        $data[] = [
            $project,
            $site_key,
            $expected,
        ];
        return $data;
    }
    
    /**
     * Mocks the HTTP client.
     *
     * @param \GuzzleHttp\Psr7\Response ...
     *   Variable number of Response objects that the mocked client should return.
     */
    protected function mockClient(Response ...$responses) {
        // Create a mock and queue responses.
        $mock_handler = new MockHandler($responses);
        $handler_stack = HandlerStack::create($mock_handler);
        $history = Middleware::history($this->history);
        $handler_stack->push($history);
        $this->mockHttpClient = new Client([
            'handler' => $handler_stack,
        ]);
    }
    
    /**
     * @covers ::doRequest
     * @covers ::fetchProjectData
     */
    public function testUpdateFetcherNoFallback() : void {
        // First, try without the HTTP fallback setting, and HTTPS mocked to fail.
        $settings = new Settings([]);
        $this->mockClient(new Response(500, [], 'HTTPS failed'));
        $update_fetcher = new UpdateFetcher($this->mockConfigFactory, $this->mockHttpClient, $settings, $this->logger);
        $data = $update_fetcher->fetchProjectData($this->testProject, '');
        // There should only be one request / response pair.
        $this->assertCount(1, $this->history);
        $request = $this->history[0]['request'];
        $this->assertNotEmpty($request);
        // It should have only been an HTTPS request.
        $this->assertEquals('https', $request->getUri()
            ->getScheme());
        // And it should have failed.
        $response = $this->history[0]['response'];
        $this->assertEquals(500, $response->getStatusCode());
        $this->assertEmpty($data);
        $this->assertTrue($this->logger
            ->hasErrorThatPasses(function (array $record) {
            return $record['context']['@message'] === "Server error: `GET https://www.example.com/update_test/current` resulted in a `500 Internal Server Error` response:\nHTTPS failed\n";
        }));
    }
    
    /**
     * @covers ::doRequest
     * @covers ::fetchProjectData
     */
    public function testUpdateFetcherHttpFallback() : void {
        $settings = new Settings([
            'update_fetch_with_http_fallback' => TRUE,
        ]);
        $this->mockClient(new Response(500, [], 'HTTPS failed'), new Response(200, [], 'HTTP worked'));
        $update_fetcher = new UpdateFetcher($this->mockConfigFactory, $this->mockHttpClient, $settings, $this->logger);
        $data = $update_fetcher->fetchProjectData($this->testProject, '');
        // There should be two request / response pairs.
        $this->assertCount(2, $this->history);
        // The first should have been HTTPS and should have failed.
        $first_try = $this->history[0];
        $this->assertNotEmpty($first_try);
        $this->assertEquals('https', $first_try['request']->getUri()
            ->getScheme());
        $this->assertEquals(500, $first_try['response']->getStatusCode());
        // The second should have been the HTTP fallback and should have worked.
        $second_try = $this->history[1];
        $this->assertNotEmpty($second_try);
        $this->assertEquals('http', $second_try['request']->getUri()
            ->getScheme());
        $this->assertEquals(200, $second_try['response']->getStatusCode());
        // Although this is a bogus mocked response, it's what fetchProjectData()
        // should return in this case.
        $this->assertEquals('HTTP worked', $data);
        $this->assertTrue($this->logger
            ->hasErrorThatPasses(function (array $record) {
            return $record['context']['@message'] === "Server error: `GET https://www.example.com/update_test/current` resulted in a `500 Internal Server Error` response:\nHTTPS failed\n";
        }));
    }

}