Merge pull request #2703 from fanninpm/test-userlist

Add test_userlist from CPython 3.8

Lib/test/test_userlist.py

@@ -0,0 +1,81 @@
+# Check every path through every method of UserList
+
+from collections import UserList
+from test import list_tests
+import unittest
+
+class UserListTest(list_tests.CommonTest):
+    type2test = UserList
+
+    # TODO: RUSTPYTHON, parent method is marked but this version passes
+    def test_init(self):
+        super().test_init()
+
+    # TODO: RUSTPYTHON, parent method is marked but this version passes
+    import sys
+    @unittest.skipIf(sys.platform == "win32", "TODO: RUSTPYTHON, unexpectedly panics somewhere")
+    def test_repr_deep(self):
+        super().test_repr_deep()
+
+    def test_getslice(self):
+        super().test_getslice()
+        l = [0, 1, 2, 3, 4]
+        u = self.type2test(l)
+        for i in range(-3, 6):
+            self.assertEqual(u[:i], l[:i])
+            self.assertEqual(u[i:], l[i:])
+            for j in range(-3, 6):
+                self.assertEqual(u[i:j], l[i:j])
+
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
+    def test_slice_type(self):
+        l = [0, 1, 2, 3, 4]
+        u = UserList(l)
+        self.assertIsInstance(u[:], u.__class__)
+        self.assertEqual(u[:],u)
+
+    def test_add_specials(self):
+        u = UserList("spam")
+        u2 = u + "eggs"
+        self.assertEqual(u2, list("spameggs"))
+
+    def test_radd_specials(self):
+        u = UserList("eggs")
+        u2 = "spam" + u
+        self.assertEqual(u2, list("spameggs"))
+        u2 = u.__radd__(UserList("spam"))
+        self.assertEqual(u2, list("spameggs"))
+
+    def test_iadd(self):
+        super().test_iadd()
+        u = [0, 1]
+        u += UserList([0, 1])
+        self.assertEqual(u, [0, 1, 0, 1])
+
+    def test_mixedcmp(self):
+        u = self.type2test([0, 1])
+        self.assertEqual(u, [0, 1])
+        self.assertNotEqual(u, [0])
+        self.assertNotEqual(u, [0, 2])
+
+    def test_mixedadd(self):
+        u = self.type2test([0, 1])
+        self.assertEqual(u + [], u)
+        self.assertEqual(u + [2], [0, 1, 2])
+
+    def test_getitemoverwriteiter(self):
+        # Verify that __getitem__ overrides *are* recognized by __iter__
+        class T(self.type2test):
+            def __getitem__(self, key):
+                return str(key) + '!!!'
+        self.assertEqual(next(iter(T((1,2)))), "0!!!")
+
+    def test_userlist_copy(self):
+        u = self.type2test([6, 8, 1, 9, 1])
+        v = u.copy()
+        self.assertEqual(u, v)
+        self.assertEqual(type(u), type(v))
+
+if __name__ == "__main__":
+    unittest.main()