Add missing tests

Author: asvetlov

CHANGES.rst

@@ -1,4 +1,4 @@
-3.2.0 (2017-09-xx)
+3.2.0 (2017-09-17)
 ------------------
 
 * Fix pickling (#134)

tests/test_copy.py

@@ -0,0 +1,65 @@
+import copy
+import pytest
+
+from multidict._multidict import (MultiDict, CIMultiDict,
+                                  MultiDictProxy, CIMultiDictProxy)
+from multidict._multidict_py import (MultiDict as PyMultiDict,
+                                     CIMultiDict as PyCIMultiDict,
+                                     MultiDictProxy as PyMultiDictProxy,
+                                     CIMultiDictProxy as PyCIMultiDictProxy)
+
+
+@pytest.fixture(params=[MultiDict, PyMultiDict,
+                        CIMultiDict, PyCIMultiDict],
+                ids=['MultiDict', 'PyMultiDict',
+                     'CIMultiDict', 'PyCIMultiDict'])
+def cls(request):
+    return request.param
+
+
+@pytest.fixture(params=[(MultiDictProxy, MultiDict),
+                        (PyMultiDictProxy, PyMultiDict),
+                        (CIMultiDictProxy, CIMultiDict),
+                        (PyCIMultiDictProxy, PyCIMultiDict)],
+                ids=['MultiDictProxy', 'PyMultiDictProxy',
+                     'CIMultiDictProxy', 'PyCIMultiDictProxy'])
+def proxy_classes(request):
+    return request.param
+
+
+def test_copy(cls):
+    d = cls()
+    d['foo'] = 6
+    d2 = d.copy()
+    d2['foo'] = 7
+    assert d['foo'] == 6
+    assert d2['foo'] == 7
+
+
+def test_copy_proxy(proxy_classes):
+    proxy_cls, dict_cls = proxy_classes
+    d = dict_cls()
+    d['foo'] = 6
+    p = proxy_cls(d)
+    d2 = p.copy()
+    d2['foo'] = 7
+    assert d['foo'] == 6
+    assert p['foo'] == 6
+    assert d2['foo'] == 7
+
+
+def test_copy_std_copy(cls):
+    d = cls()
+    d['foo'] = 6
+    d2 = copy.copy(d)
+    d2['foo'] = 7
+    assert d['foo'] == 6
+    assert d2['foo'] == 7
+
+
+def test_ci_multidict_clone(cls):
+    d = cls(foo=6)
+    d2 = cls(d)
+    d2['foo'] = 7
+    assert d['foo'] == 6
+    assert d2['foo'] == 7