Add run tests

Author: JukkaL

mypyc/test-data/run-classes.test

@@ -934,6 +934,53 @@ def welp() -> int:
 from native import welp
 assert welp() == 35
 
+[case testSubclassUnsupportedException]
+from mypy_extensions import mypyc_attr
+
+@mypyc_attr(native_class=False)
+class MyError(ZeroDivisionError):
+    pass
+
+@mypyc_attr(native_class=False)
+class MyError2(ZeroDivisionError):
+    def __init__(self, s: str) -> None:
+        super().__init__(s + "!")
+        self.x = s.upper()
+
+def f() -> None:
+    raise MyError("foobar")
+
+def test_non_native_exception_subclass_basics() -> None:
+    e = MyError()
+    assert isinstance(e, MyError)
+    assert isinstance(e, ZeroDivisionError)
+    assert isinstance(e, Exception)
+
+    e = MyError("x")
+    assert repr(e) == "MyError('x')"
+
+    e2 = MyError2("ab")
+    assert repr(e2) == "MyError2('ab!')", repr(e2)
+    assert e2.x == "AB"
+
+def test_raise_non_native_exception_subclass_1() -> None:
+    try:
+        f()
+    except MyError:
+        x = True
+    else:
+        assert False
+    assert x
+
+def test_raise_non_native_exception_subclass_2() -> None:
+    try:
+        f()
+    except ZeroDivisionError:
+        x = True
+    else:
+        assert False
+    assert x
+
 [case testSubclassPy]
 from b import B, V
 class A(B):