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# coding: utf-8

"""
http://yaml.org/type/timestamp.html specifies the regexp to use
for datetime.date and datetime.datetime construction. Date is simple
but datetime can have 'T' or 't' as well as 'Z' or a timezone offset (in
hours and minutes). This information was originally used to create
a UTC datetime and then discarded

examples from the above:

canonical:        2001-12-15T02:59:43.1Z
valid iso8601:    2001-12-14t21:59:43.10-05:00
space separated:  2001-12-14 21:59:43.10 -5
no time zone (Z): 2001-12-15 2:59:43.10
date (00:00:00Z): 2002-12-14

Please note that a fraction can only be included if not equal to 0

"""

import copy

import pytest  # NOQA

from .roundtrip import dedent, round_trip, round_trip_dump, round_trip_load  # NOQA


class TestDateTime:
    def test_date_only(self):
        inp = """
        - 2011-10-02
        """
        exp = """
        - 2011-10-02
        """
        round_trip(inp, exp)

    def test_zero_fraction(self):
        inp = """
        - 2011-10-02 16:45:00.0
        """
        exp = """
        - 2011-10-02 16:45:00
        """
        round_trip(inp, exp)

    def test_long_fraction(self):
        inp = """
        - 2011-10-02 16:45:00.1234      # expand with zeros
        - 2011-10-02 16:45:00.123456
        - 2011-10-02 16:45:00.12345612  # round to microseconds
        - 2011-10-02 16:45:00.1234565   # round up
        - 2011-10-02 16:45:00.12345678  # round up
        """
        exp = """
        - 2011-10-02 16:45:00.123400    # expand with zeros
        - 2011-10-02 16:45:00.123456
        - 2011-10-02 16:45:00.123456    # round to microseconds
        - 2011-10-02 16:45:00.123457    # round up
        - 2011-10-02 16:45:00.123457    # round up
        """
        round_trip(inp, exp)

    def test_canonical(self):
        inp = """
        - 2011-10-02T16:45:00.1Z
        """
        exp = """
        - 2011-10-02T16:45:00.100000Z
        """
        round_trip(inp, exp)

    def test_spaced_timezone(self):
        inp = """
        - 2011-10-02T11:45:00 -5
        """
        exp = """
        - 2011-10-02T11:45:00-5
        """
        round_trip(inp, exp)

    def test_normal_timezone(self):
        round_trip(
            """
        - 2011-10-02T11:45:00-5
        - 2011-10-02 11:45:00-5
        - 2011-10-02T11:45:00-05:00
        - 2011-10-02 11:45:00-05:00
        """
        )

    def test_no_timezone(self):
        inp = """
        - 2011-10-02 6:45:00
        """
        exp = """
        - 2011-10-02 06:45:00
        """
        round_trip(inp, exp)

    def test_explicit_T(self):
        inp = """
        - 2011-10-02T16:45:00
        """
        exp = """
        - 2011-10-02T16:45:00
        """
        round_trip(inp, exp)

    def test_explicit_t(self):  # to upper
        inp = """
        - 2011-10-02t16:45:00
        """
        exp = """
        - 2011-10-02T16:45:00
        """
        round_trip(inp, exp)

    def test_no_T_multi_space(self):
        inp = """
        - 2011-10-02   16:45:00
        """
        exp = """
        - 2011-10-02 16:45:00
        """
        round_trip(inp, exp)

    def test_iso(self):
        round_trip(
            """
        - 2011-10-02T15:45:00+01:00
        """
        )

    def test_zero_tz(self):
        round_trip(
            """
        - 2011-10-02T15:45:00+0
        """
        )

    def test_issue_45(self):
        round_trip(
            """
        dt: 2016-08-19T22:45:47Z
        """
        )

    def test_deepcopy_datestring(self):
        # reported by Quuxplusone, http://stackoverflow.com/a/41577841/1307905
        x = dedent(
            """\
        foo: 2016-10-12T12:34:56
        """
        )
        data = copy.deepcopy(round_trip_load(x))
        assert round_trip_dump(data) == x