I'm playing with the idea of returning a custom explanation for tests with
a particular marker but returning Pytest's standard explanation for tests
without the marker.
I was hoping to do something like this...
# content of conftest.py
def pytest_assertrepr_compare(config, op, left, right):
if <current test uses "mymark">:
return ['My custom explanation!']
# content of test_mystuff.py
import pytest
def test_mystuff1():
assert 100 == 105
@pytest.mark.mymark
def test_mystuff2():
assert 100 == 105
# Desired Output
__________ test_mystuff1 __________
def test_mystuff1():
> assert 100 == 105
E assert 100 == 105
E -100
E +105
test_mystuff.py:4: AssertionError
__________ test_mystuff2 __________
@pytest.mark.mymark
def test_mystuff2():
> assert 100 == 105
E assert My custom explanation!
test_mystuff.py:8: AssertionError
I've looked through the plugin API but I don't see a straightforward way of
doing this. I was hoping I could get a reference to the current test
through the config (even if it was a convoluted reference) but I don't know
if this is possible. Digging deeper, I see some undesirable approaches I
could probably use to accomplish this (e.g., monkey-patch util._reprcompare
or possibly maintain a plugin-level global that points to the current test)
but nothing that seems to work with the grain of the plugin API.
So I have a few related questions I'm hoping someone can help me with:
Q: Is there a way to reference the current test from within
pytest_assertrepr_compare()?
Q: If not, is there a decent way to implement something like this that
isn't too hacky?
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