Add test_xml_dom_minicompat from CPython 3.8

fanninpm · fanninpm · commit 33a030aff9dc · 2021-07-12T20:02:13.000-04:00
diff --git a/Lib/test/test_xml_dom_minicompat.py b/Lib/test/test_xml_dom_minicompat.py
@@ -0,0 +1,138 @@
+# Tests for xml.dom.minicompat
+
+import copy
+import pickle
+import unittest
+
+import xml.dom
+from xml.dom.minicompat import *
+
+
+class EmptyNodeListTestCase(unittest.TestCase):
+    """Tests for the EmptyNodeList class."""
+
+    def test_emptynodelist_item(self):
+        # Test item access on an EmptyNodeList.
+        node_list = EmptyNodeList()
+
+        self.assertIsNone(node_list.item(0))
+        self.assertIsNone(node_list.item(-1)) # invalid item
+
+        with self.assertRaises(IndexError):
+            node_list[0]
+        with self.assertRaises(IndexError):
+            node_list[-1]
+
+    def test_emptynodelist_length(self):
+        node_list = EmptyNodeList()
+        # Reading
+        self.assertEqual(node_list.length, 0)
+        # Writing
+        with self.assertRaises(xml.dom.NoModificationAllowedErr):
+            node_list.length = 111
+
+    def test_emptynodelist___add__(self):
+        node_list = EmptyNodeList() + NodeList()
+        self.assertEqual(node_list, NodeList())
+
+    def test_emptynodelist___radd__(self):
+        node_list = [1,2] + EmptyNodeList()
+        self.assertEqual(node_list, [1,2])
+
+
+class NodeListTestCase(unittest.TestCase):
+    """Tests for the NodeList class."""
+
+    def test_nodelist_item(self):
+        # Test items access on a NodeList.
+        # First, use an empty NodeList.
+        node_list = NodeList()
+
+        self.assertIsNone(node_list.item(0))
+        self.assertIsNone(node_list.item(-1))
+
+        with self.assertRaises(IndexError):
+            node_list[0]
+        with self.assertRaises(IndexError):
+            node_list[-1]
+
+        # Now, use a NodeList with items.
+        node_list.append(111)
+        node_list.append(999)
+
+        self.assertEqual(node_list.item(0), 111)
+        self.assertIsNone(node_list.item(-1)) # invalid item
+
+        self.assertEqual(node_list[0], 111)
+        self.assertEqual(node_list[-1], 999)
+
+    def test_nodelist_length(self):
+        node_list = NodeList([1, 2])
+        # Reading
+        self.assertEqual(node_list.length, 2)
+        # Writing
+        with self.assertRaises(xml.dom.NoModificationAllowedErr):
+            node_list.length = 111
+
+    def test_nodelist___add__(self):
+        node_list = NodeList([3, 4]) + [1, 2]
+        self.assertEqual(node_list, NodeList([3, 4, 1, 2]))
+
+    def test_nodelist___radd__(self):
+        node_list = [1, 2] + NodeList([3, 4])
+        self.assertEqual(node_list, NodeList([1, 2, 3, 4]))
+
+    def test_nodelist_pickle_roundtrip(self):
+        # Test pickling and unpickling of a NodeList.
+
+        for proto in range(pickle.HIGHEST_PROTOCOL + 1):
+            # Empty NodeList.
+            node_list = NodeList()
+            pickled = pickle.dumps(node_list, proto)
+            unpickled = pickle.loads(pickled)
+            self.assertIsNot(unpickled, node_list)
+            self.assertEqual(unpickled, node_list)
+
+            # Non-empty NodeList.
+            node_list.append(1)
+            node_list.append(2)
+            pickled = pickle.dumps(node_list, proto)
+            unpickled = pickle.loads(pickled)
+            self.assertIsNot(unpickled, node_list)
+            self.assertEqual(unpickled, node_list)
+
+    def test_nodelist_copy(self):
+        # Empty NodeList.
+        node_list = NodeList()
+        copied = copy.copy(node_list)
+        self.assertIsNot(copied, node_list)
+        self.assertEqual(copied, node_list)
+
+        # Non-empty NodeList.
+        node_list.append([1])
+        node_list.append([2])
+        copied = copy.copy(node_list)
+        self.assertIsNot(copied, node_list)
+        self.assertEqual(copied, node_list)
+        for x, y in zip(copied, node_list):
+            self.assertIs(x, y)
+
+    def test_nodelist_deepcopy(self):
+        # Empty NodeList.
+        node_list = NodeList()
+        copied = copy.deepcopy(node_list)
+        self.assertIsNot(copied, node_list)
+        self.assertEqual(copied, node_list)
+
+        # Non-empty NodeList.
+        node_list.append([1])
+        node_list.append([2])
+        copied = copy.deepcopy(node_list)
+        self.assertIsNot(copied, node_list)
+        self.assertEqual(copied, node_list)
+        for x, y in zip(copied, node_list):
+            self.assertIsNot(x, y)
+            self.assertEqual(x, y)
+
+if __name__ == '__main__':
+    unittest.main()
