Verifies that the fixture sample_fixture returns the expected value 42.

Communicates to readers and test runners that the fixture is expected to produce the exact value 42.

When writing a unit test to validate that a test fixture provides a known constant value.

Unit test functions, typically in a pytest test module, testing fixture correctness.

def test_<name>(<fixture>): assert <fixture> == <expected_literal>

def test_<name>(<fixture>): assert <fixture> == <expected>

fixture_name expected_value

• assert == fixture test pytest ==

• assert sample_fixture == expected assert sample_fixture != 42 assert sample_fixture is 42 assert sample_fixture == 42.0

using assignment (=) instead of equality (==) confusing identity (is) with equality misnaming the fixture asserting against the wrong type or value

assert sample_fixture == 42 assert sample_fixture != 42 assert sample_fixture is 42 assert sample_fixture == pytest.approx(42.0) assert sample_fixture in {40, 41, 42}

Confusing '==' with '=' leading to assignment instead of comparison Using 'is' for value equality instead of identity Assuming fixture returns an integer when it may be another type

• unit_test_assertion

The test checks for exact integer equality; it will fail if the fixture returns a different numeric type or value.

Signals to readers and test runners that the fixture is expected to deliver the exact value 42, serving as a sanity check.

test_example asserts sample_fixture equals 42

Simple sanity test for a fixture that should return the integer 42.

Consider using pytest's assert approximation for floats, or parametrize for multiple expected values.