mirror of https://github.com/k3s-io/k3s
79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"time"
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)
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// Clock allows for injecting fake or real clocks into code that
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// needs to do arbitrary things based on time.
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type Clock interface {
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Now() time.Time
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Since(time.Time) time.Duration
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}
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// RealClock really calls time.Now()
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type RealClock struct{}
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// Now returns the current time.
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func (r RealClock) Now() time.Time {
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return time.Now()
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}
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// Since returns time since the specified timestamp.
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func (r RealClock) Since(ts time.Time) time.Duration {
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return time.Since(ts)
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}
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// FakeClock implements Clock, but returns an arbitrary time.
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type FakeClock struct {
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Time time.Time
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}
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// Now returns f's time.
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func (f *FakeClock) Now() time.Time {
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return f.Time
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}
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// Since returns time since the time in f.
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func (f *FakeClock) Since(ts time.Time) time.Duration {
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return f.Time.Sub(ts)
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}
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// Move clock by Duration
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func (f *FakeClock) Step(d time.Duration) {
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f.Time = f.Time.Add(d)
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}
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// IntervalClock implements Clock, but each invocation of Now steps the clock forward the specified duration
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type IntervalClock struct {
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Time time.Time
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Duration time.Duration
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}
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// Now returns i's time.
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func (i *IntervalClock) Now() time.Time {
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i.Time = i.Time.Add(i.Duration)
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return i.Time
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}
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// Since returns time since the time in i.
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func (i *IntervalClock) Since(ts time.Time) time.Duration {
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return i.Time.Sub(ts)
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}
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