public function testMergeThrowsExceptionIfOtherGroupAlreadyBound() { $group1 = new FieldGroup('author'); $group2 = new FieldGroup('publisher'); $group2->add($this->createMockField('firstName')); $group2->bind(array('firstName' => 'Bernhard')); $this->setExpectedException('Symfony\\Components\\Form\\Exception\\AlreadyBoundException'); $group1->merge($group2); }