pytest Quick Start Guide

Enter @pytest.mark.parametrize

To solve all the above problems, pytest provides the much-loved @pytest.mark.parametrize mark. With this mark, you are able to provide a list of input values to the test, and pytest automatically generates multiple test functions for each input value.

The following shows this in action:

@pytest.mark.parametrize(    "formula, inputs, result",    [        ("C0 * x + 10", dict(x=1.0, C0=2.0), 12.0),        ("sin(x) + 2 * cos(x)", dict(x=0.7), 2.1739021),        ("log(x) + 3", dict(x=2.71828182846), 4.0),    ],)def test_formula_parsing(formula, inputs, result):    tokenizer = FormulaTokenizer()    formula = Formula.from_string(formula, tokenizer)    assert formula.eval(**inputs) == pytest.approx(result)

The @pytest.mark.parametrize mark automatically ...