Python Testing with pytest

Parametrizing with Dynamic Values

In the previous example using dictionaries, the parameter values came from a function, text_variants.values(). We can write our own functions to generate parameter values.

Let’s move the generation of text variants into a function, text_variants(), which we’ll define shortly. We can then call that function for our parameter values:

ch16/test_param_gen.py

@pytest.mark.parametrize("variant", text_variants())
def test_summary(cards_db, variant):
    i = cards_db.add_card(Card(summary=variant))
    c = cards_db.get_card(i)
    assert c.summary == variant

Now we need to define our text_variants() function. It can really be anything, but let’s use a dictionary like before, and use it to generate pytest.param