我有一个函数来计算一个方格的值,我想对此进行测试。
函数平方是这样的:
public function squaring($number)
{
if ($number == 0) {
throw new InvalidDataException("0 can't be squared");
}
return $number * $number;
}
测试它的第一步是检查它是否正确:
public function testIfSquaringIsCorrect()
{
$number = 2;
$result = $this->modelPractice->squaring($number);
$this->assertEquals(4, $result);
}
最后一步检查我是否得到了例外。
我该怎么做?
我这样试试,但它不起作用:
public function testSquaringLaunchInvalidDataException()
{
$number = 0;
$result = $this->modelPractice->squaring($number);
$expected = $this->exceptException(InvalidDataException::class);
$this->assertEquals($expected, $result);
}
谢谢!
答案 0 :(得分:2)
Phpunit有专门的异常断言:
$this->expectException(InvalidArgumentException::class);