function BigPipeTest::testBigPipe

Tests BigPipe-delivered HTML responses when JavaScript is enabled.

Covers:

• \Drupal\big_pipe\EventSubscriber\HtmlResponseBigPipeSubscriber
• \Drupal\big_pipe\Render\BigPipe
• \Drupal\big_pipe\Render\BigPipe::sendPlaceholders()

See also

\Drupal\big_pipe_test\BigPipePlaceholderTestCases

File

core/modules/big_pipe/tests/src/Functional/BigPipeTest.php, line 143

Class

BigPipeTest

Tests BigPipe's no-JS detection & response delivery (with and without JS).

Namespace

Code

public function testBigPipe() {
    // Simulate production.
    $this->config('system.logging')
        ->set('error_level', ERROR_REPORTING_HIDE)
        ->save();
    $this->drupalLogin($this->rootUser);
    $this->assertSessionCookieExists(TRUE);
    $this->assertBigPipeNoJsCookieExists(FALSE);
    $connection = Database::getConnection();
    $log_count = $connection->select('watchdog')
        ->countQuery()
        ->execute()
        ->fetchField();
    // By not calling performMetaRefresh() here, we simulate JavaScript being
    // enabled, because as far as the BigPipe module is concerned, JavaScript is
    // enabled in the browser as long as the BigPipe no-JS cookie is *not* set.
    // @see setUp()
    // @see performMetaRefresh()
    $this->drupalGet(Url::fromRoute('big_pipe_test'));
    $this->assertBigPipeResponseHeadersPresent();
    $this->assertSession()
        ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'cache_tag_set_in_lazy_builder');
    $this->setCsrfTokenSeedInTestEnvironment();
    $cases = $this->getTestCases();
    $this->assertBigPipeNoJsPlaceholders([
        $cases['edge_case__invalid_html']->bigPipeNoJsPlaceholder => $cases['edge_case__invalid_html']->embeddedHtmlResponse,
        $cases['html_attribute_value']->bigPipeNoJsPlaceholder => $cases['html_attribute_value']->embeddedHtmlResponse,
        $cases['html_attribute_value_subset']->bigPipeNoJsPlaceholder => $cases['html_attribute_value_subset']->embeddedHtmlResponse,
    ]);
    $this->assertBigPipePlaceholders([
        $cases['html']->bigPipePlaceholderId => Json::encode($cases['html']->embeddedAjaxResponseCommands),
        $cases['edge_case__html_non_lazy_builder']->bigPipePlaceholderId => Json::encode($cases['edge_case__html_non_lazy_builder']->embeddedAjaxResponseCommands),
        $cases['exception__lazy_builder']->bigPipePlaceholderId => NULL,
        $cases['exception__embedded_response']->bigPipePlaceholderId => NULL,
    ], [
        0 => $cases['edge_case__html_non_lazy_builder']->bigPipePlaceholderId,
        // The 'html' case contains the 'status messages' placeholder, which is
        // always rendered last.
1 => $cases['html']->bigPipePlaceholderId,
    ]);
    $this->assertSession()
        ->responseContains('</body>');
    // Verifying BigPipe assets are present.
    $this->assertNotEmpty($this->getDrupalSettings());
    $this->assertContains('big_pipe/big_pipe', explode(',', $this->getDrupalSettings()['ajaxPageState']['libraries']), 'BigPipe asset library is present.');
    // Verify that the two expected exceptions are logged as errors.
    $this->assertEquals($log_count + 2, (int) $connection->select('watchdog')
        ->countQuery()
        ->execute()
        ->fetchField(), 'Two new watchdog entries.');
    // Using dynamic select queries with the method range() allows contrib
    // database drivers the ability to insert their own limit and offset
    // functionality.
    $records = $connection->select('watchdog', 'w')
        ->fields('w')
        ->orderBy('wid', 'DESC')
        ->range(0, 2)
        ->execute()
        ->fetchAll();
    $this->assertEquals(RfcLogLevel::ERROR, $records[0]->severity);
    $this->assertStringContainsString('Oh noes!', (string) unserialize($records[0]->variables)['@message']);
    $this->assertEquals(RfcLogLevel::ERROR, $records[1]->severity);
    $this->assertStringContainsString('You are not allowed to say llamas are not cool!', (string) unserialize($records[1]->variables)['@message']);
    // Verify that 4xx responses work fine. (4xx responses are handled by
    // subrequests to a route pointing to a controller with the desired output.)
    $this->drupalGet(Url::fromUri('base:non-existing-path'));
    // Simulate development.
    // Verifying BigPipe provides useful error output when an error occurs
    // while rendering a placeholder if verbose error logging is enabled.
    $this->config('system.logging')
        ->set('error_level', ERROR_REPORTING_DISPLAY_VERBOSE)
        ->save();
    $this->drupalGet(Url::fromRoute('big_pipe_test'));
    // The 'edge_case__html_exception' case throws an exception.
    $this->assertSession()
        ->pageTextContains('The website encountered an unexpected error. Please try again later');
    $this->assertSession()
        ->pageTextContains('You are not allowed to say llamas are not cool!');
    // Check that stop signal and closing body tag are absent.
    $this->assertSession()
        ->responseNotContains(BigPipe::STOP_SIGNAL);
    $this->assertSession()
        ->responseNotContains('</body>');
    // The exception is expected. Do not interpret it as a test failure.
    unlink($this->root . '/' . $this->siteDirectory . '/error.log');
}