-v hint shown in raises diff, but verbosity not propagated in raises.py

[ananya4khandelwal]

Hi,

While investigating pytest.raises(..., match=...) diff behavior, I noticed that when the assertion diff truncates identical leading characters, the output includes the hint:

Skipping XX identical leading characters in diff, use -v to show

However, running with -v or -vv produces identical output -- verbosity does not seem to affect this code path.

Minimal Reproducer

import pytest, re

def test_raises_v_hint_broken():
    prefix = "A" * 60
    expected = prefix + " expected_ending"
    actual = prefix + " actual_ending"

    with pytest.raises(ValueError, match=f"^{re.escape(expected)}$"):
        raise ValueError(actual)

Running this produces:

AssertionError: Skipping 51 identical leading characters in diff, use -v to show

Running with -v or -vv produces identical output.

Observations

It appears _check_match() calls _diff_text() with the default verbosity (verbose=0), and verbosity from the pytest config is not propagated. _diff_text() does respect verbosity >= 1, but it never receives it in this path.

There is also a TODO in the code noting uncertainty around this behavior.

Question

Is this the intended behavior, or should verbosity be propagated so that -v actually reveals the skipped leading characters?

Happy to work on a fix if this is unintended.

Thanks!