Drop python2 support (#519)

The PR removes python2 references and cases.

Close #518

Co-authored-by: Inada Naoki <songofacandy@gmail.com>

test/test_buffer.py

@@ -6,7 +6,6 @@ import pytest
 from msgpack import packb, unpackb
 
 
-@pytest.mark.skipif(sys.version_info[0] == 2, reason="Python 2 is not supported")
 def test_unpack_buffer():
     from array import array
 

test/test_case.py

@@ -134,4 +134,4 @@ def test_match():
 
 
 def test_unicode():
-    assert unpackb(packb(u"foobar"), use_list=1) == u"foobar"
+    assert unpackb(packb("foobar"), use_list=1) == "foobar"

test/test_except.py

@@ -53,7 +53,7 @@ def test_invalidvalue():
 
 
 def test_strict_map_key():
-    valid = {u"unicode": 1, b"bytes": 2}
+    valid = {"unicode": 1, b"bytes": 2}
     packed = packb(valid, use_bin_type=True)
     assert valid == unpackb(packed, raw=False, strict_map_key=True)
 

test/test_extension.py

@@ -55,10 +55,7 @@ def test_extension_type():
         print("ext_hook called", code, data)
         assert code == 123
         obj = array.array("d")
-        try:
-            obj.frombytes(data)
-        except AttributeError:  # PY2
-            obj.fromstring(data)
+        obj.frombytes(data)
         return obj
 
     obj = [42, b"hello", array.array("d", [1.1, 2.2, 3.3])]
@@ -67,20 +64,14 @@ def test_extension_type():
     assert obj == obj2
 
 
-import sys
-
-if sys.version > "3":
-    long = int
-
-
 def test_overriding_hooks():
     def default(obj):
-        if isinstance(obj, long):
+        if isinstance(obj, int):
             return {"__type__": "long", "__data__": str(obj)}
         else:
             return obj
 
-    obj = {"testval": long(1823746192837461928374619)}
+    obj = {"testval": 1823746192837461928374619}
     refobj = {"testval": default(obj["testval"])}
     refout = msgpack.packb(refobj)
     assert isinstance(refout, (str, bytes))

test/test_memoryview.py

@@ -7,11 +7,6 @@ from msgpack import packb, unpackb
 import sys
 
 
-pytestmark = pytest.mark.skipif(
-    sys.version_info[0] < 3, reason="Only Python 3 supports buffer protocol"
-)
-
-
 def make_array(f, data):
     a = array(f)
     a.frombytes(data)

test/test_pack.py

@@ -80,9 +80,6 @@ def testPackByteArrays():
         check(td)
 
 
-@pytest.mark.skipif(
-    sys.version_info < (3, 0), reason="Python 2 passes invalid surrogates"
-)
 def testIgnoreUnicodeErrors():
     re = unpackb(
         packb(b"abc\xeddef", use_bin_type=False), raw=False, unicode_errors="ignore"
@@ -96,9 +93,6 @@ def testStrictUnicodeUnpack():
         unpackb(packed, raw=False, use_list=1)
 
 
-@pytest.mark.skipif(
-    sys.version_info < (3, 0), reason="Python 2 passes invalid surrogates"
-)
 def testIgnoreErrorsPack():
     re = unpackb(
         packb("abc\uDC80\uDCFFdef", use_bin_type=True, unicode_errors="ignore"),

test/test_timestamp.py

@@ -4,9 +4,6 @@ import datetime
 import msgpack
 from msgpack.ext import Timestamp
 
-if sys.version_info[0] > 2:
-    from msgpack.ext import _utc
-
 
 def test_timestamp():
     # timestamp32
@@ -85,33 +82,33 @@ def test_timestamp_to():
     assert t.to_unix_nano() == 42000014000
 
 
-@pytest.mark.skipif(sys.version_info[0] == 2, reason="datetime support is PY3+ only")
 def test_timestamp_datetime():
     t = Timestamp(42, 14)
-    assert t.to_datetime() == datetime.datetime(1970, 1, 1, 0, 0, 42, 0, tzinfo=_utc)
+    utc = datetime.timezone.utc
+    assert t.to_datetime() == datetime.datetime(1970, 1, 1, 0, 0, 42, 0, tzinfo=utc)
 
 
-@pytest.mark.skipif(sys.version_info[0] == 2, reason="datetime support is PY3+ only")
 def test_unpack_datetime():
     t = Timestamp(42, 14)
+    utc = datetime.timezone.utc
     packed = msgpack.packb(t)
     unpacked = msgpack.unpackb(packed, timestamp=3)
-    assert unpacked == datetime.datetime(1970, 1, 1, 0, 0, 42, 0, tzinfo=_utc)
+    assert unpacked == datetime.datetime(1970, 1, 1, 0, 0, 42, 0, tzinfo=utc)
 
 
-@pytest.mark.skipif(sys.version_info[0] == 2, reason="datetime support is PY3+ only")
 def test_pack_unpack_before_epoch():
-    t_in = datetime.datetime(1960, 1, 1, tzinfo=_utc)
+    utc = datetime.timezone.utc
+    t_in = datetime.datetime(1960, 1, 1, tzinfo=utc)
     packed = msgpack.packb(t_in, datetime=True)
     unpacked = msgpack.unpackb(packed, timestamp=3)
     assert unpacked == t_in
 
 
-@pytest.mark.skipif(sys.version_info[0] == 2, reason="datetime support is PY3+ only")
 def test_pack_datetime():
     t = Timestamp(42, 14000)
     dt = t.to_datetime()
-    assert dt == datetime.datetime(1970, 1, 1, 0, 0, 42, 14, tzinfo=_utc)
+    utc = datetime.timezone.utc
+    assert dt == datetime.datetime(1970, 1, 1, 0, 0, 42, 14, tzinfo=utc)
 
     packed = msgpack.packb(dt, datetime=True)
     packed2 = msgpack.packb(t)
@@ -131,10 +128,10 @@ def test_pack_datetime():
     assert msgpack.unpackb(packed) is None
 
 
-@pytest.mark.skipif(sys.version_info[0] == 2, reason="datetime support is PY3+ only")
 def test_issue451():
     # https://github.com/msgpack/msgpack-python/issues/451
-    dt = datetime.datetime(2100, 1, 1, 1, 1, tzinfo=_utc)
+    utc = datetime.timezone.utc
+    dt = datetime.datetime(2100, 1, 1, 1, 1, tzinfo=utc)
     packed = msgpack.packb(dt, datetime=True)
     assert packed == b"\xd6\xff\xf4\x86eL"
 
@@ -142,7 +139,6 @@ def test_issue451():
     assert dt == unpacked
 
 
-@pytest.mark.skipif(sys.version_info[0] == 2, reason="datetime support is PY3+ only")
 def test_pack_datetime_without_tzinfo():
     dt = datetime.datetime(1970, 1, 1, 0, 0, 42, 14)
     with pytest.raises(ValueError, match="where tzinfo=None"):
@@ -152,7 +148,8 @@ def test_pack_datetime_without_tzinfo():
     packed = msgpack.packb(dt, datetime=True, default=lambda x: None)
     assert packed == msgpack.packb(None)
 
-    dt = datetime.datetime(1970, 1, 1, 0, 0, 42, 14, tzinfo=_utc)
+    utc = datetime.timezone.utc
+    dt = datetime.datetime(1970, 1, 1, 0, 0, 42, 14, tzinfo=utc)
     packed = msgpack.packb(dt, datetime=True)
     unpacked = msgpack.unpackb(packed, timestamp=3)
     assert unpacked == dt

test/test_unpack.py

@@ -70,7 +70,7 @@ def test_unpacker_ext_hook():
 
 
 def test_unpacker_tell():
-    objects = 1, 2, u"abc", u"def", u"ghi"
+    objects = 1, 2, "abc", "def", "ghi"
     packed = b"\x01\x02\xa3abc\xa3def\xa3ghi"
     positions = 1, 2, 6, 10, 14
     unpacker = Unpacker(BytesIO(packed))
@@ -80,7 +80,7 @@ def test_unpacker_tell():
 
 
 def test_unpacker_tell_read_bytes():
-    objects = 1, u"abc", u"ghi"
+    objects = 1, "abc", "ghi"
     packed = b"\x01\x02\xa3abc\xa3def\xa3ghi"
     raw_data = b"\x02", b"\xa3def", b""
     lenghts = 1, 4, 999