public function CacheExampleTest::testCacheExampleBasic in Examples for Developers 8

Same name and namespace in other branches

1. 3.x modules/cache_example/tests/src/Functional/CacheExampleTest.php \Drupal\Tests\cache_example\Functional\CacheExampleTest::testCacheExampleBasic()

Test that our caches function.

Does the following:

• Load cache example page and test if displaying uncached version.
• Reload once again and test if displaying cached version.
• Find reload link and click on it.
• Clear cache at the end and test if displaying uncached version again.

File

cache_example/tests/src/Functional/CacheExampleTest.php, line 67

Class

CacheExampleTest

Tests for the cache_example module.

Namespace

Drupal\Tests\cache_example\Functional

Code

public function testCacheExampleBasic() {
  $assert = $this
    ->assertSession();

  // We need administrative privileges to clear the cache.
  $admin_user = $this
    ->drupalCreateUser([
    'administer site configuration',
  ]);
  $this
    ->drupalLogin($admin_user);

  // Get initial page cache example page, first time accessed,
  // and assert uncached output.
  $this
    ->drupalGet('examples/cache-example');
  $assert
    ->pageTextContains('Source: actual file search');

  // Reload the page; the number should be cached.
  $this
    ->drupalGet('examples/cache-example');
  $assert
    ->pageTextContains('Source: cached');

  // Now push the button to remove the count.
  $this
    ->drupalPostForm('examples/cache-example', [], 'Explicitly remove cached file count');
  $assert
    ->pageTextContains('Source: actual file search');

  // Create a cached item. First make sure it doesn't already exist.
  $assert
    ->pageTextContains('Cache item does not exist');
  $this
    ->drupalPostForm('examples/cache-example', [
    'expiration' => -10,
  ], 'Create a cache item with this expiration');

  // We should now have an already-expired item. Automatically invalid.
  $assert
    ->pageTextContains('Cache_item is invalid');

  // Now do the expiration operation.
  $this
    ->drupalPostForm('examples/cache-example', [
    'cache_clear_type' => 'expire',
  ], 'Clear or expire cache');

  // And verify that it was removed.
  $assert
    ->pageTextContains('Cache item does not exist');

  // Create a cached item. This time we'll make it not expire.
  $this
    ->drupalPostForm('examples/cache-example', [
    'expiration' => 'never_remove',
  ], 'Create a cache item with this expiration');

  // We should now have an never-remove item.
  $assert
    ->pageTextContains('Cache item exists and is set to expire at Never expires');

  // Now do the expiration operation.
  $this
    ->drupalPostForm('examples/cache-example', [
    'cache_clear_type' => 'expire',
  ], 'Clear or expire cache');

  // And verify that it was not removed.
  $assert
    ->pageTextContains('Cache item exists and is set to expire at Never expires');

  // Now do tag invalidation.
  $this
    ->drupalPostForm('examples/cache-example', [
    'cache_clear_type' => 'remove_tag',
  ], 'Clear or expire cache');

  // And verify that it was invalidated.
  $assert
    ->pageTextContains('Cache_item is invalid');

  // Do the hard delete.
  $this
    ->drupalPostForm('examples/cache-example', [
    'cache_clear_type' => 'remove_all',
  ], 'Clear or expire cache');

  // And verify that it was removed.
  $assert
    ->pageTextContains('Cache item does not exist');
}