Common Assert Methods

assertEqual and assertNotEqual

These compare two values for equality or inequality and are the most commonly used assertions in any test suite.

Example: assertEqual and assertNotEqual

These compare two values for equality or inequality and are the most commonly used assertions in any test suite.

class EqualityTests(TestCase):
    def test_addition(self):
        self.assertEqual(1 + 1, 2)

    def test_not_equal(self):
        self.assertNotEqual(1 + 1, 3)

assertTrue and assertFalse

These check that a single expression evaluates to True or False, useful for boolean flags and conditions.

Example: assertTrue and assertFalse

These check that a single expression evaluates to True or False, useful for boolean flags and conditions.

class BooleanTests(TestCase):
    def test_is_active_true(self):
        self.assertTrue(1 > 0)

    def test_is_active_false(self):
        self.assertFalse(1 < 0)

assertIn and assertRaises

assertIn checks that a value exists inside a list, string, or queryset, while assertRaises checks that calling code raises a specific exception.

Note: assertRaises must be used as a context manager with with, wrapping the code that should raise.

Example: assertIn and assertRaises

assertIn checks that a value exists inside a list, string, or queryset, while assertRaises checks that calling code raises a specific exception.

class OtherAssertTests(TestCase):
    def test_value_in_list(self):
        self.assertIn(3, [1, 2, 3])

    def test_division_by_zero_raises(self):
        with self.assertRaises(ZeroDivisionError):
            1 / 0