如何测试每一行是否抛出相同的异常？

Question

I want to test that my function refuses all non-positive integers. It throws an InvalidArgumentException. I wrote a test like this:

/**
 * @test
 * @expectedException InvalidArgumentException
 */
public function testXThrowsException()
{
    $this->parser->x(1.5);
    $this->parser->x('2');
    $this->parser->x(1000E-1);
    $this->parser->x(+100);
}

My test always passes because the first one throws an exception. The others don't get tested properly. I can add $this->parser->x(1); to my code and it would still pass.

What should I do to assert that all these function calls raise the InvalidArgumentException?

Answer 1

/**
 * @test
 * @expectedException InvalidArgumentException
 *
 * @dataProvider foo
 */
public function testXThrowsException($value)
{
    $this->parser->x($value);
}

/**
 * Test data
 * Returns array of arrays, each inner array is used in
 * a call_user_func_array (or similar) construction
 */
public function foo()
{
    return array(
        array(1.5),
        array('2'),
        array(1000E-1),
        array(+100)
    );
}