function PageCacheTest::testPageCacheHeaders

Tests page cache headers.

File

core/modules/page_cache/tests/src/Functional/PageCacheTest.php, line 248

Class

PageCacheTest

Enables the page cache and tests it with various HTTP requests.

Namespace

Code

protected function testPageCacheHeaders() : void {
  $this->enablePageCaching();
  // Fill the cache.
  $this->drupalGet('system-test/set-header', [
    'query' => [
      'name' => 'Foo',
      'value' => 'bar',
    ],
  ]);
  $this->assertSession()
    ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
  $this->assertSession()
    ->responseHeaderContains('Vary', 'cookie');
  // Symfony's Response logic determines a specific order for the subvalues
  // of the Cache-Control header, even if they are explicitly passed in to
  // the response header bag in a different order.
  $this->assertCacheMaxAge(300);
  $this->assertSession()
    ->responseHeaderEquals('Expires', 'Sun, 19 Nov 1978 05:00:00 GMT');
  $this->assertSession()
    ->responseHeaderEquals('Foo', 'bar');
  // Check cache.
  $this->drupalGet('system-test/set-header', [
    'query' => [
      'name' => 'Foo',
      'value' => 'bar',
    ],
  ]);
  $this->assertSession()
    ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
  $this->assertSession()
    ->responseHeaderContains('Vary', 'cookie');
  $this->assertCacheMaxAge(300);
  $this->assertSession()
    ->responseHeaderEquals('Expires', 'Sun, 19 Nov 1978 05:00:00 GMT');
  $this->assertSession()
    ->responseHeaderEquals('Foo', 'bar');
  // Check replacing default headers.
  $this->drupalGet('system-test/set-header', [
    'query' => [
      'name' => 'Expires',
      'value' => 'Fri, 19 Nov 2008 05:00:00 GMT',
    ],
  ]);
  $this->assertSession()
    ->responseHeaderEquals('Expires', 'Fri, 19 Nov 2008 05:00:00 GMT');
  $this->drupalGet('system-test/set-header', [
    'query' => [
      'name' => 'Vary',
      'value' => 'User-Agent',
    ],
  ]);
  $this->assertSession()
    ->responseHeaderContains('Vary', 'user-agent');
  // Check that authenticated users bypass the cache.
  $user = $this->drupalCreateUser();
  $this->drupalLogin($user);
  $this->drupalGet('system-test/set-header', [
    'query' => [
      'name' => 'Foo',
      'value' => 'bar',
    ],
  ]);
  $this->assertSession()
    ->responseHeaderDoesNotExist('X-Drupal-Cache');
  $this->assertSession()
    ->responseHeaderNotContains('Vary', 'cookie');
  $this->assertSession()
    ->responseHeaderEquals('Cache-Control', 'must-revalidate, no-cache, private');
  $this->assertSession()
    ->responseHeaderEquals('Expires', 'Sun, 19 Nov 1978 05:00:00 GMT');
  $this->assertSession()
    ->responseHeaderEquals('Foo', 'bar');
  // Until bubbling of max-age up to the response is supported, verify that
  // a custom #cache max-age set on an element does not affect page max-age.
  $this->drupalLogout();
  $this->drupalGet('system-test/cache_max_age_page');
  $this->assertCacheMaxAge(300);
}