Providing test data in Python [duplicate]

Question

How can I run the same test against a lot of different data?

I want to be reported of all failures.

For example:

def isEven(number):
    return True # Quite buggy implementation

data = [
    (2, True),
    (3, False),
    (4, True),
    (5, False),
]

class MyTest:
   def evenTest(self, num, expected):
       self.assertEquals(expected, isEven(num))

I have found solution which raises error on first failure only: PHPUnit style dataProvider in Python unit test

How can I run a test to be reported of all failures?

Answer 1

If you are using pytest you can go this way:

import pytest

def is_even(number):
    return True # Wuite buggy implementation

@pytest.mark.parametrize("number, expected", [
    (2, True),
    (3, False),
    (4, True),
    (5, False)
])
def test_is_even(number, expected):
    assert is_even(number) == expected

You will get something like (shortened):

/tmp/test_it.py:13: AssertionError
=========== 2 failed, 2 passed in 0.01 seconds ====================