ThemeRegistryLoader example

/** * @covers ::findTemplate */
  public function testLoaderReturnsFalseForExistsOnNonexistent() {
    $registry = $this->prophesize('Drupal\Core\Theme\Registry');
    $runtime = $this->prophesize('Drupal\Core\Utility\ThemeRegistry');
    $runtime->has('foo')
      ->shouldBeCalled()
      ->willReturn(FALSE);
    $registry->getRuntime()->willReturn($runtime);

    $loader = new ThemeRegistryLoader($registry->reveal());
    $this->assertFalse($loader->exists('foo'));
  }

}