Fix mypy error

darrenburns · darrenburns · commit c91165829c0a · 2021-06-25T10:53:15.000+01:00
diff --git a/ward/expect.py b/ward/expect.py
@@ -38,7 +38,7 @@ def __exit__(
         exc_val: Optional[BaseException],
         exc_tb: Optional[types.TracebackType],
     ) -> bool:
-        if not issubclass(exc_type, self.expected_ex_type):
+        if exc_type and not issubclass(exc_type, self.expected_ex_type):
             raise AssertionError(
                 f"Expected exception {self.expected_ex_type}, but {exc_type} was raised instead."
             )

Original file line number	Diff line number	Diff line change
`@@ -38,7 +38,7 @@ def __exit__(`
`38`	`38`	`exc_val: Optional[BaseException],`
`39`	`39`	`exc_tb: Optional[types.TracebackType],`
`40`	`40`	`) -> bool:`
`41`		`- if not issubclass(exc_type, self.expected_ex_type):`
	`41`	`+ if exc_type and not issubclass(exc_type, self.expected_ex_type):`
`42`	`42`	`raise AssertionError(`
`43`	`43`	`f"Expected exception {self.expected_ex_type}, but {exc_type} was raised instead."`
`44`	`44`	`)`