public function testDeleteWithException() { $taxClass = $this->getMock('\\Magento\\Tax\\Model\\ClassModel', [], [], '', false); $taxClass->expects($this->once())->method('getClassId')->willReturn(1); $this->taxClassResourceMock->expects($this->once())->method('delete')->willThrowException(new \Exception('Some Message')); $this->assertFalse($this->model->delete($taxClass)); }