separate DTI, Timestamp, Series, DataFrame, tslibs timezones tests

pandas/tests/frame/test_timezones.py

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+# -*- coding: utf-8 -*-
+"""
+Tests for DataFrame timezone-related methods
+"""
+from datetime import datetime
+
+import pytest
+import pytz
+import numpy as np
+
+
+import pandas.util.testing as tm
+from pandas.compat import lrange
+from pandas.core.indexes.datetimes import date_range
+from pandas.core.dtypes.dtypes import DatetimeTZDtype
+from pandas import Series, DataFrame
+
+
+class TestDataFrameTimezones(object):
+    def test_frame_from_records_utc(self):
+        rec = {'datum': 1.5,
+               'begin_time': datetime(2006, 4, 27, tzinfo=pytz.utc)}
+
+        # it works
+        DataFrame.from_records([rec], index='begin_time')
+
+    def test_frame_tz_localize(self):
+        rng = date_range('1/1/2011', periods=100, freq='H')
+
+        df = DataFrame({'a': 1}, index=rng)
+        result = df.tz_localize('utc')
+        expected = DataFrame({'a': 1}, rng.tz_localize('UTC'))
+        assert result.index.tz.zone == 'UTC'
+        tm.assert_frame_equal(result, expected)
+
+        df = df.T
+        result = df.tz_localize('utc', axis=1)
+        assert result.columns.tz.zone == 'UTC'
+        tm.assert_frame_equal(result, expected.T)
+
+    def test_frame_tz_convert(self):
+        rng = date_range('1/1/2011', periods=200, freq='D', tz='US/Eastern')
+        df = DataFrame({'a': 1}, index=rng)
+        result = df.tz_convert('Europe/Berlin')
+        expected = DataFrame({'a': 1}, rng.tz_convert('Europe/Berlin'))
+        assert result.index.tz.zone == 'Europe/Berlin'
+        tm.assert_frame_equal(result, expected)
+
+        df = df.T
+        result = df.tz_convert('Europe/Berlin', axis=1)
+        assert result.columns.tz.zone == 'Europe/Berlin'
+        tm.assert_frame_equal(result, expected.T)
+
+    def test_frame_join_tzaware(self):
+        test1 = DataFrame(np.zeros((6, 3)),
+                          index=date_range("2012-11-15 00:00:00", periods=6,
+                                           freq="100L", tz="US/Central"))
+        test2 = DataFrame(np.zeros((3, 3)),
+                          index=date_range("2012-11-15 00:00:00", periods=3,
+                                           freq="250L", tz="US/Central"),
+                          columns=lrange(3, 6))
+
+        result = test1.join(test2, how='outer')
+        ex_index = test1.index.union(test2.index)
+
+        tm.assert_index_equal(result.index, ex_index)
+        assert result.index.tz.zone == 'US/Central'
+
+    def test_frame_add_tz_mismatch_converts_to_utc(self):
+        rng = date_range('1/1/2011', periods=10, freq='H', tz='US/Eastern')
+        df = DataFrame(np.random.randn(len(rng)), index=rng, columns=['a'])
+
+        df_moscow = df.tz_convert('Europe/Moscow')
+        result = df + df_moscow
+        assert result.index.tz is pytz.utc
+
+        result = df_moscow + df
+        assert result.index.tz is pytz.utc
+
+    def test_frame_align_aware(self):
+        idx1 = date_range('2001', periods=5, freq='H', tz='US/Eastern')
+        idx2 = date_range('2001', periods=5, freq='2H', tz='US/Eastern')
+        df1 = DataFrame(np.random.randn(len(idx1), 3), idx1)
+        df2 = DataFrame(np.random.randn(len(idx2), 3), idx2)
+        new1, new2 = df1.align(df2)
+        assert df1.index.tz == new1.index.tz
+        assert df2.index.tz == new2.index.tz
+
+        # # different timezones convert to UTC
+
+        # frame
+        df1_central = df1.tz_convert('US/Central')
+        new1, new2 = df1.align(df1_central)
+        assert new1.index.tz == pytz.UTC
+        assert new2.index.tz == pytz.UTC
+
+        # series
+        new1, new2 = df1[0].align(df1_central[0])
+        assert new1.index.tz == pytz.UTC
+        assert new2.index.tz == pytz.UTC
+
+        # combination
+        new1, new2 = df1.align(df1_central[0], axis=0)
+        assert new1.index.tz == pytz.UTC
+        assert new2.index.tz == pytz.UTC
+
+        df1[0].align(df1_central, axis=0)
+        assert new1.index.tz == pytz.UTC
+        assert new2.index.tz == pytz.UTC
+
+    @pytest.mark.parametrize('tz', ['US/Eastern', 'dateutil/US/Eastern'])
+    def test_frame_no_datetime64_dtype(self, tz):
+        # after GH#7822
+        # these retain the timezones on dict construction
+        dr = date_range('2011/1/1', '2012/1/1', freq='W-FRI')
+        dr_tz = dr.tz_localize(tz)
+        df = DataFrame({'A': 'foo', 'B': dr_tz}, index=dr)
+        tz_expected = DatetimeTZDtype('ns', dr_tz.tzinfo)
+        assert df['B'].dtype == tz_expected
+
+        # GH 2810 (with timezones)
+        datetimes_naive = [ts.to_pydatetime() for ts in dr]
+        datetimes_with_tz = [ts.to_pydatetime() for ts in dr_tz]
+        df = DataFrame({'dr': dr,
+                        'dr_tz': dr_tz,
+                        'datetimes_naive': datetimes_naive,
+                        'datetimes_with_tz': datetimes_with_tz})
+        result = df.get_dtype_counts().sort_index()
+        expected = Series({'datetime64[ns]': 2,
+                           str(tz_expected): 2}).sort_index()
+        tm.assert_series_equal(result, expected)
+
+    @pytest.mark.parametrize('tz', ['US/Eastern', 'dateutil/US/Eastern'])
+    def test_frame_reset_index(self, tz):
+        dr = date_range('2012-06-02', periods=10, tz=tz)
+        df = DataFrame(np.random.randn(len(dr)), dr)
+        roundtripped = df.reset_index().set_index('index')
+        xp = df.index.tz
+        rs = roundtripped.index.tz
+        assert xp == rs