Google\Cloud\Tests\Datastore\KeyTest::testPathEndIdentifierType PHP Method

    public function testPathEndIdentifierType()
    {
        $key = new Key('foo', ['path' => [['kind' => 'foo', 'id' => 2], ['kind' => 'bar', 'id' => 10]]]);
        $this->assertEquals(Key::TYPE_ID, $key->pathEndIdentifierType());
    }