Add --no-trace option, overrides pytrace=True for pytest.fail

AUTHORS

@@ -110,6 +110,7 @@ Grig Gheorghiu
 Grigorii Eremeev (budulianin)
 Guido Wesdorp
 Guoqiang Zhang
+Guy Perry
 Harald Armin Massa
 Henk-Jaap Wagenaar
 Holger Kohr

changelog/6651.feature.rst

@@ -0,0 +1,2 @@
+Add the --no-trace flag, allowing to override `pytrace=True` for `pytest.fail` calls.
+This is useful to avoid automated `pytest` runs outputting unwanted information.

src/_pytest/main.py

@@ -180,6 +180,13 @@ def pytest_addoption(parser):
  default=False,
  help="Don't ignore tests in a local virtualenv directory",
  )
+ group.addoption(
+ "--notrace",
+ "--no-trace",
+ action="store_true",
+ default=False,
+ help="Do not output any traceback in case of failure, even when passing pytrace=True",
+ )
 
  group = parser.getgroup("debugconfig", "test session debugging and configuration")
  group.addoption(

src/_pytest/nodes.py

@@ -287,7 +287,9 @@ def _repr_failure_py(
  self, excinfo: ExceptionInfo[Union[Failed, FixtureLookupError]], style=None
  ) -> Union[str, ReprExceptionInfo, ExceptionChainRepr, FixtureLookupErrorRepr]:
  if isinstance(excinfo.value, Failed):
- if not excinfo.value.pytrace:
+ if (
+ self.config is not None and self.config.getoption("notrace")
+ ) or not excinfo.value.pytrace:
  return str(excinfo.value)
  if isinstance(excinfo.value, FixtureLookupError):
  return excinfo.value.formatrepr()

testing/test_runner.py

@@ -629,7 +629,7 @@ def pytest_sessionstart():
  assert result.ret == 98
 
 
-def test_pytest_fail_notrace_runtest(testdir) -> None:
+def test_pytest_fail_pytrace_false_runtest(testdir) -> None:
  """Test pytest.fail(..., pytrace=False) does not show tracebacks during test run."""
  testdir.makepyfile(
  """
@@ -645,7 +645,23 @@ def teardown_function(function):
  result.stdout.no_fnmatch_line("*def teardown_function*")
 
 
-def test_pytest_fail_notrace_collection(testdir) -> None:
+def test_pytest_fail_notrace_pytrace_true_runtest(testdir) -> None:
+ """Test pytest.fail(..., pytrace=True) does not show tracebacks when passing --no-trace."""
+ testdir.makepyfile(
+ """
+ import pytest
+ def test_hello():
+ pytest.fail("hello", pytrace=True)
+ def teardown_function(function):
+ pytest.fail("world", pytrace=True)
+ """
+ )
+ result = testdir.runpytest("--no-trace")
+ result.stdout.fnmatch_lines(["world", "hello"])
+ result.stdout.no_fnmatch_line("*def teardown_function*")
+
+
+def test_pytest_fail_pytrace_false_collection(testdir) -> None:
  """Test pytest.fail(..., pytrace=False) does not show tracebacks during collection."""
  testdir.makepyfile(
  """
@@ -660,7 +676,7 @@ def some_internal_function():
  result.stdout.no_fnmatch_line("*def some_internal_function()*")
 
 
-def test_pytest_fail_notrace_non_ascii(testdir) -> None:
+def test_pytest_fail_pytrace_false_non_ascii(testdir) -> None:
  """Fix pytest.fail with pytrace=False with non-ascii characters (#1178).
 
  This tests with native and unicode strings containing non-ascii chars.