function Test_of_get_and_get_PrimaryKey() { $AkTestField = new AkTestField(); $this->assertEqual($AkTestField->getPrimaryKey(), 'id'); $AkTestField->setPrimaryKey('text_field'); $this->assertEqual($AkTestField->getPrimaryKey(), 'text_field'); $this->assertError($AkTestField->setPrimaryKey('unavailable_field'), 'unavailable_field'); }