Change default, add more tests, add changelog entry

changelog/12231.feature.rst

@@ -0,0 +1,16 @@
+Add `--xfail-tb` flag, which acts a lot like `--tb`, but controls the traceback output for XFAIL results.   
+
+* The `--xfail-tb` flag takes one argument, `auto|long|short|line|native|no`, and defaults to `no`.  
+* To turn on xfail tracebacks, pass in `-rx` or `-ra` along with `--xfail-tb=short` (or any of `auto`, `long`, `short`, `line`, or `native`).
+
+The `--tb` flag, that controls normal test failure tracebacks, defaults to `auto`.  
+This change really only separates the traceback behavior of normal vs xfail failures.
+
+Some history:  
+
+* This is a behavior break, but brings default behavior back to pre-8.0.0 behavior.
+* With this change, default `-rx`/ `-ra` behavior is identical to pre-8.0 with respect to xfail tracebacks.
+* With pytest 8.0, `-rx` or `-ra` would not only turn on summary reports for xfail, but also report the tracebacks for xfail results.
+* This caused issues with some projects that utilize xfail, but don't want to see all of the xfail tracebacks.
+
+

src/_pytest/terminal.py

@@ -221,7 +221,7 @@ def pytest_addoption(parser: Parser) -> None:
         metavar="style",
         action="store",
         dest="xfail_tbstyle",
-        default="auto",
+        default="no",
         choices=["auto", "long", "short", "no", "line", "native"],
         help="Traceback print mode for xfail (auto/long/short/line/native/no)",
     )
@@ -1091,7 +1091,7 @@ class TerminalReporter:
         which_reports: str,
         sep_title: str,
         needed_opt: Optional[str] = None,
-        style=None,
+        style: Optional[str] = None,
     ) -> None:
         if style is None:
             style = self.config.option.tbstyle

testing/test_terminal.py

@@ -2909,7 +2909,7 @@ def test_summary_xfail_reason(pytester: Pytester) -> None:
     assert result.stdout.lines.count(expect2) == 1
 
 
-def test_summary_xfail_tb(pytester: Pytester) -> None:
+def test_xfail_tb_default(pytester: Pytester) -> None:
     pytester.makepyfile(
         """
         import pytest
@@ -2920,7 +2920,33 @@ def test_summary_xfail_tb(pytester: Pytester) -> None:
             assert a == b
         """
     )
+    # defaults to "no", so this is the same as `runpytest("-rx", "--xfail-tb=no")`
     result = pytester.runpytest("-rx")
+    # Don't show traceback
+    result.stdout.no_fnmatch_line("*= XFAILURES =*")
+    result.stdout.no_fnmatch_line("*test_xfail_tb_line.py:6: assert 1 == 2")
+    # still print summary
+    result.stdout.fnmatch_lines(
+        [
+            "*= short test summary info =*",
+            "XFAIL test_xfail_tb_default.py::test_xfail",
+            "*= 1 xfailed in * =*",
+        ]
+    )
+    
+
+def test_xfail_tb_short(pytester: Pytester) -> None:
+    pytester.makepyfile(
+        """
+        import pytest
+
+        @pytest.mark.xfail
+        def test_xfail():
+            a, b = 1, 2
+            assert a == b
+        """
+    )
+    result = pytester.runpytest("-rx", "--xfail-tb=short")
     result.stdout.fnmatch_lines(
         [
             "*= XFAILURES =*",
@@ -2928,11 +2954,10 @@ def test_summary_xfail_tb(pytester: Pytester) -> None:
             "*@pytest.mark.xfail*",
             "*def test_xfail():*",
             "* a, b = 1, 2*",
-            "> *assert a == b*",
-            "E *assert 1 == 2*",
-            "test_summary_xfail_tb.py:6: AssertionError*",
+            "*> *assert a == b*",
+            "*E *assert 1 == 2*",
             "*= short test summary info =*",
-            "XFAIL test_summary_xfail_tb.py::test_xfail",
+            "XFAIL test_xfail_tb_short.py::test_xfail",
             "*= 1 xfailed in * =*",
         ]
     )