Merge pull request #4978 from blueyed/exit-from-from_assertrepr_compare

Do not swallow outcomes.Exit in assertrepr_compare

changelog/4978.bugfix.rst

@@ -0,0 +1 @@
+``outcomes.Exit`` is not swallowed in ``assertrepr_compare`` anymore.

src/_pytest/assertion/util.py

@@ -9,6 +9,7 @@ import six
 
 import _pytest._code
 from ..compat import Sequence
+from _pytest import outcomes
 from _pytest._io.saferepr import saferepr
 
 # The _reprcompare attribute on the util module is used by the new assertion
@@ -102,32 +103,30 @@ except NameError:
     basestring = str
 
 
-def assertrepr_compare(config, op, left, right):
-    """Return specialised explanations for some operators/operands"""
-    width = 80 - 15 - len(op) - 2  # 15 chars indentation, 1 space around op
-    left_repr = saferepr(left, maxsize=int(width // 2))
-    right_repr = saferepr(right, maxsize=width - len(left_repr))
-
-    summary = u"%s %s %s" % (ecu(left_repr), op, ecu(right_repr))
-
 def issequence(x):
     return isinstance(x, Sequence) and not isinstance(x, basestring)
 
+
 def istext(x):
     return isinstance(x, basestring)
 
+
 def isdict(x):
     return isinstance(x, dict)
 
+
 def isset(x):
     return isinstance(x, (set, frozenset))
 
+
 def isdatacls(obj):
     return getattr(obj, "__dataclass_fields__", None) is not None
 
+
 def isattrs(obj):
     return getattr(obj, "__attrs_attrs__", None) is not None
 
+
 def isiterable(obj):
     try:
         iter(obj)
@@ -135,6 +134,15 @@ def assertrepr_compare(config, op, left, right):
     except TypeError:
         return False
 
+
+def assertrepr_compare(config, op, left, right):
+    """Return specialised explanations for some operators/operands"""
+    width = 80 - 15 - len(op) - 2  # 15 chars indentation, 1 space around op
+    left_repr = saferepr(left, maxsize=int(width // 2))
+    right_repr = saferepr(right, maxsize=width - len(left_repr))
+
+    summary = u"%s %s %s" % (ecu(left_repr), op, ecu(right_repr))
+
     verbose = config.getoption("verbose")
     explanation = None
     try:
@@ -162,6 +170,8 @@ def assertrepr_compare(config, op, left, right):
         elif op == "not in":
             if istext(left) and istext(right):
                 explanation = _notin_text(left, right, verbose)
+    except outcomes.Exit:
+        raise
     except Exception:
         explanation = [
             u"(pytest_assertion plugin: representation of details failed.  "

testing/test_assertion.py

@@ -11,6 +11,7 @@ import six
 
 import _pytest.assertion as plugin
 import pytest
+from _pytest import outcomes
 from _pytest.assertion import truncate
 from _pytest.assertion import util
 
@@ -1305,3 +1306,13 @@ def test_issue_1944(testdir):
         "AttributeError: 'Module' object has no attribute '_obj'"
         not in result.stdout.str()
     )
+
+
+def test_exit_from_assertrepr_compare(monkeypatch):
+    def raise_exit(obj):
+        outcomes.exit("Quitting debugger")
+
+    monkeypatch.setattr(util, "istext", raise_exit)
+
+    with pytest.raises(outcomes.Exit, match="Quitting debugger"):
+        callequal(1, 1)