github.com/m3db/m3@v1.5.0/src/x/time/time_test.go

// Copyright (c) 2016 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package time

import (
	"testing"
	"time"

	"github.com/stretchr/testify/require"
)

func TestToNormalizedTime(t *testing.T) {
	inputs := []struct {
		t        time.Time
		u        time.Duration
		expected int64
	}{
		{time.Unix(1, 0), time.Second, 1},
		{time.Unix(0, 150000000), time.Millisecond, 150},
		{time.Unix(0, 150000000), time.Microsecond, 150000},
		{time.Unix(0, 150000000), time.Nanosecond, 150000000},
		{time.Unix(0, 150000000), time.Second, 0},
	}
	for _, input := range inputs {
		require.Equal(t, input.expected, ToNormalizedTime(input.t, input.u))
	}
}

func TestFromNormalizedTime(t *testing.T) {
	inputs := []struct {
		nt       int64
		u        time.Duration
		expected time.Time
	}{
		{1, time.Second, time.Unix(1, 0)},
		{150, time.Millisecond, time.Unix(0, 150000000)},
		{150000, time.Microsecond, time.Unix(0, 150000000)},
		{150000000, time.Nanosecond, time.Unix(0, 150000000)},
		{60100, time.Millisecond, time.Unix(60, 100000000)},
	}
	for _, input := range inputs {
		exTime := ToUnixNano(input.expected)
		require.Equal(t, exTime, FromNormalizedTime(input.nt, input.u))
	}
}

func TestToNormalizedDuration(t *testing.T) {
	inputs := []struct {
		d        time.Duration
		u        time.Duration
		expected int64
	}{
		{60 * time.Second, time.Second, 60},
		{60 * time.Second, time.Millisecond, 60000},
		{60100 * time.Millisecond, time.Second, 60},
	}
	for _, input := range inputs {
		require.Equal(t, input.expected, ToNormalizedDuration(input.d, input.u))
	}
}

func TestFromNormalizedDuration(t *testing.T) {
	inputs := []struct {
		nd       int64
		u        time.Duration
		expected time.Duration
	}{
		{60, time.Second, time.Minute},
		{60100, time.Millisecond, 60100 * time.Millisecond},
		{1000000000, time.Nanosecond, time.Second},
	}
	for _, input := range inputs {
		require.Equal(t, input.expected, FromNormalizedDuration(input.nd, input.u))
	}
}

func TestToNanoseconds(t *testing.T) {
	input := time.Unix(1, 100000000)
	require.Equal(t, int64(1100000000), ToNanoseconds(input))
}

func TestFromNanoseconds(t *testing.T) {
	expected := time.Unix(1, 100000000)
	require.Equal(t, expected, FromNanoseconds(1100000000))
}

var testTime = time.Date(2015, 5, 21, 18, 17, 46, 0, time.UTC)

func TestToUnixMillis(t *testing.T) {
	ms := ToUnixMillis(testTime)
	require.Equal(t, int64(1432232266000), ms)
}

func TestFromUnixMillis(t *testing.T) {
	tm := FromUnixMillis(1432232266000).UTC()
	require.Equal(t, testTime, tm)
}

func TestCeil(t *testing.T) {
	var timeZero time.Time
	inputs := []struct {
		t        time.Time
		d        time.Duration
		expected time.Time
	}{
		{timeZero.Add(2 * time.Hour), time.Hour, timeZero.Add(2 * time.Hour)},
		{timeZero.Add(2 * time.Hour), 2 * time.Hour, timeZero.Add(2 * time.Hour)},
		{timeZero.Add(15 * time.Minute), 2 * time.Hour, timeZero.Add(2 * time.Hour)},
	}
	for _, input := range inputs {
		require.Equal(t, input.expected, Ceil(input.t, input.d))
	}
}

func TestMinTime(t *testing.T) {
	inputs := []struct {
		t1       time.Time
		t2       time.Time
		expected time.Time
	}{
		{time.Unix(10, 0), time.Unix(20, 0), time.Unix(10, 0)},
		{time.Unix(20, 0), time.Unix(10, 0), time.Unix(10, 0)},
		{time.Unix(10, 0), time.Unix(10, 0), time.Unix(10, 0)},
	}
	for _, input := range inputs {
		require.Equal(t, input.expected, MinTime(input.t1, input.t2))
	}
}

func TestMaxTime(t *testing.T) {
	inputs := []struct {
		t1       time.Time
		t2       time.Time
		expected time.Time
	}{
		{time.Unix(10, 0), time.Unix(20, 0), time.Unix(20, 0)},
		{time.Unix(20, 0), time.Unix(10, 0), time.Unix(20, 0)},
		{time.Unix(10, 0), time.Unix(10, 0), time.Unix(10, 0)},
	}
	for _, input := range inputs {
		require.Equal(t, input.expected, MaxTime(input.t1, input.t2))
	}
}

func TestTruncate(t *testing.T) {
	var (
		n      = time.Now().UTC()
		format = "1 2 3:04:05PM"

		day   = time.Hour * 24
		week  = day * 7
		month = day * 30
		year  = day * 365

		blockSizes = []time.Duration{
			time.Nanosecond,
			time.Nanosecond * 123,
			time.Microsecond,
			time.Microsecond,
			time.Millisecond * 123,
			time.Second,
			time.Second * 11,
			time.Minute,
			time.Hour,
			day,
			day * 2,
			day*2 + time.Hour*6,
			week,
			month,
			year,
		}
	)

	for _, blockSize := range blockSizes {
		blockSize := blockSize
		t.Run(blockSize.String(), func(t *testing.T) {
			xNow := ToUnixNano(n).Truncate(blockSize)
			now := n.Truncate(blockSize)

			require.Equal(t, now.String(), xNow.String())
			require.Equal(t, now.Format(format), xNow.Format(format))
			require.Equal(t, now.UnixNano(), int64(xNow))
		})
	}
}