function ShutdownFunctionTest::testShutdownFunctionInShutdownFunction

Tests that shutdown functions can be added by other shutdown functions.

File

core/tests/Drupal/KernelTests/Core/Bootstrap/ShutdownFunctionTest.php, line 33

Class

ShutdownFunctionTest

Tests.

Namespace

Code

public function testShutdownFunctionInShutdownFunction() : void {
    // Ensure there are no shutdown functions registered before starting the
    // test.
    $this->assertEmpty(drupal_register_shutdown_function());
    // Register a shutdown function that, when called, will register another
    // shutdown function.
    drupal_register_shutdown_function([
        $this,
        'shutdownOne',
    ]);
    $this->assertCount(1, drupal_register_shutdown_function());
    // Simulate the Drupal shutdown.
    _drupal_shutdown_function();
    // Test that the expected functions are called.
    $this->assertTrue($this->shutDownOneCalled);
    $this->assertTrue($this->shutDownTwoCalled);
    $this->assertCount(2, drupal_register_shutdown_function());
}