Add exception to value alias on ExceptionInfo

For easier compatibility with unittest pytest-dev/unittest2pytest#36 Co-Authored-By: Bruno Oliveira <[email protected]>
graingert · Jul 3, 2019 · 127de96 · 127de96
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diff --git a/changelog/5541.feature.rst b/changelog/5541.feature.rst
@@ -0,0 +1 @@
+Add '.exception' attribute as an alias for '.value' to facilitate porting tests written using unittest.
diff --git a/src/_pytest/_code/code.py b/src/_pytest/_code/code.py
@@ -422,6 +422,16 @@ def type(self):
     def value(self):
         """the exception value"""
         return self._excinfo[1]
+
+    @property
+    def exception(self):
+        msg = (
+            "The '.exception' attribute is an alias to facilitate porting "
+            "tests written using unittest.\n"
+            "Prefer '.value' in new code."
+        )  
+        warnings.warn(PytestWarning(msg), stacklevel=2)
+        return self.value        
 
     @property
     def tb(self):
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Add '.exception' attribute as an alias for '.value' to facilitate porting tests written using unittest.