| // Copyright (c) 2021 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 atomic |
| |
| import ( |
| "testing" |
| "time" |
| |
| "github.com/stretchr/testify/assert" |
| "github.com/stretchr/testify/require" |
| ) |
| |
| func TestTime(t *testing.T) { |
| start := time.Date(2021, 6, 17, 9, 10, 0, 0, time.UTC) |
| atom := NewTime(start) |
| |
| require.Equal(t, start, atom.Load(), "Load didn't work") |
| require.Equal(t, time.Time{}, NewTime(time.Time{}).Load(), "Default time value is wrong") |
| } |
| |
| func TestTimeLocation(t *testing.T) { |
| // Check TZ data hasn't been lost from load/store. |
| ny, err := time.LoadLocation("America/New_York") |
| require.NoError(t, err, "Failed to load location") |
| nyTime := NewTime(time.Date(2021, 1, 1, 0, 0, 0, 0, ny)) |
| |
| var atom Time |
| atom.Store(nyTime.Load()) |
| |
| assert.Equal(t, ny, atom.Load().Location(), "Location information is wrong") |
| } |
| |
| func TestLargeTime(t *testing.T) { |
| // Check "large/small" time that are beyond int64 ns |
| // representation (< year 1678 or > year 2262) can be |
| // correctly load/store'd. |
| t.Parallel() |
| |
| t.Run("future", func(t *testing.T) { |
| future := time.Date(2262, 12, 31, 0, 0, 0, 0, time.UTC) |
| atom := NewTime(future) |
| dayAfterFuture := atom.Load().AddDate(0, 1, 0) |
| |
| atom.Store(dayAfterFuture) |
| assert.Equal(t, 2263, atom.Load().Year()) |
| }) |
| |
| t.Run("past", func(t *testing.T) { |
| past := time.Date(1678, 1, 1, 0, 0, 0, 0, time.UTC) |
| atom := NewTime(past) |
| dayBeforePast := atom.Load().AddDate(0, -1, 0) |
| |
| atom.Store(dayBeforePast) |
| assert.Equal(t, 1677, atom.Load().Year()) |
| }) |
| } |
| |
| func TestMonotonic(t *testing.T) { |
| before := NewTime(time.Now()) |
| time.Sleep(15 * time.Millisecond) |
| after := NewTime(time.Now()) |
| |
| // try loading/storing before and test monotonic clock value hasn't been lost |
| bt := before.Load() |
| before.Store(bt) |
| d := after.Load().Sub(before.Load()) |
| assert.True(t, 15 <= d.Milliseconds()) |
| } |