Add StackError and FormatError (#331)

test/test_except.py

@@ -2,7 +2,7 @@
 # coding: utf-8
 
 from pytest import raises
-from msgpack import packb, unpackb
+from msgpack import packb, unpackb, Unpacker, FormatError, StackError, OutOfData
 
 import datetime
 
@@ -19,13 +19,34 @@ def test_raise_on_find_unsupported_value():
 def test_raise_from_object_hook():
     def hook(obj):
         raise DummyException
+
     raises(DummyException, unpackb, packb({}), object_hook=hook)
-    raises(DummyException, unpackb, packb({'fizz': 'buzz'}), object_hook=hook)
-    raises(DummyException, unpackb, packb({'fizz': 'buzz'}), object_pairs_hook=hook)
-    raises(DummyException, unpackb, packb({'fizz': {'buzz': 'spam'}}), object_hook=hook)
-    raises(DummyException, unpackb, packb({'fizz': {'buzz': 'spam'}}), object_pairs_hook=hook)
+    raises(DummyException, unpackb, packb({"fizz": "buzz"}), object_hook=hook)
+    raises(DummyException, unpackb, packb({"fizz": "buzz"}), object_pairs_hook=hook)
+    raises(DummyException, unpackb, packb({"fizz": {"buzz": "spam"}}), object_hook=hook)
+    raises(
+        DummyException,
+        unpackb,
+        packb({"fizz": {"buzz": "spam"}}),
+        object_pairs_hook=hook,
+    )
 
 
 def test_invalidvalue():
+    incomplete = b"\xd9\x97#DL_"  # raw8 - length=0x97
     with raises(ValueError):
-        unpackb(b'\xd9\x97#DL_')
+        unpackb(incomplete)
+
+    with raises(OutOfData):
+        unpacker = Unpacker()
+        unpacker.feed(incomplete)
+        unpacker.unpack()
+
+    with raises(FormatError):
+        unpackb(b"\xc1")  # (undefined tag)
+
+    with raises(FormatError):
+        unpackb(b"\x91\xc1")  # fixarray(len=1) [ (undefined tag) ]
+
+    with raises(StackError):
+        unpackb(b"\x91" * 3000)  # nested fixarray(len=1)