87 lines
2.8 KiB
Go
87 lines
2.8 KiB
Go
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// Copyright (c) 2021 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package atomic
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import (
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"testing"
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"time"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestTime(t *testing.T) {
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start := time.Date(2021, 6, 17, 9, 10, 0, 0, time.UTC)
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atom := NewTime(start)
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require.Equal(t, start, atom.Load(), "Load didn't work")
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require.Equal(t, time.Time{}, NewTime(time.Time{}).Load(), "Default time value is wrong")
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}
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func TestTimeLocation(t *testing.T) {
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// Check TZ data hasn't been lost from load/store.
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ny, err := time.LoadLocation("America/New_York")
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require.NoError(t, err, "Failed to load location")
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nyTime := NewTime(time.Date(2021, 1, 1, 0, 0, 0, 0, ny))
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var atom Time
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atom.Store(nyTime.Load())
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assert.Equal(t, ny, atom.Load().Location(), "Location information is wrong")
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}
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func TestLargeTime(t *testing.T) {
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// Check "large/small" time that are beyond int64 ns
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// representation (< year 1678 or > year 2262) can be
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// correctly load/store'd.
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t.Parallel()
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t.Run("future", func(t *testing.T) {
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future := time.Date(2262, 12, 31, 0, 0, 0, 0, time.UTC)
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atom := NewTime(future)
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dayAfterFuture := atom.Load().AddDate(0, 1, 0)
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atom.Store(dayAfterFuture)
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assert.Equal(t, 2263, atom.Load().Year())
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})
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t.Run("past", func(t *testing.T) {
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past := time.Date(1678, 1, 1, 0, 0, 0, 0, time.UTC)
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atom := NewTime(past)
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dayBeforePast := atom.Load().AddDate(0, -1, 0)
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atom.Store(dayBeforePast)
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assert.Equal(t, 1677, atom.Load().Year())
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})
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}
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func TestMonotonic(t *testing.T) {
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before := NewTime(time.Now())
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time.Sleep(15 * time.Millisecond)
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after := NewTime(time.Now())
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// try loading/storing before and test monotonic clock value hasn't been lost
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bt := before.Load()
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before.Store(bt)
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d := after.Load().Sub(before.Load())
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assert.True(t, 15 <= d.Milliseconds())
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}
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