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// Copyright (c) 2023 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 ztest
import (
"sync/atomic"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func TestMockClock_NewTicker(t *testing.T) {
var n atomic.Int32
clock := NewMockClock()
done := make(chan struct{})
defer func() { <-done }() // wait for end
quit := make(chan struct{})
// Create a channel to increment every microsecond.
go func(ticker *time.Ticker) {
defer close(done)
for {
select {
case <-quit:
ticker.Stop()
return
case <-ticker.C:
n.Add(1)
}
}
}(clock.NewTicker(time.Microsecond))
// Move clock forward.
clock.Add(2 * time.Microsecond)
assert.Equal(t, int32(2), n.Load())
close(quit)
}
func TestMockClock_NewTicker_slowConsumer(t *testing.T) {
clock := NewMockClock()
ticker := clock.NewTicker(time.Microsecond)
defer ticker.Stop()
// Two ticks, only one consumed.
clock.Add(2 * time.Microsecond)
<-ticker.C
select {
case <-ticker.C:
t.Fatal("unexpected tick")
default:
// ok
}
}
func TestMockClock_Add_negative(t *testing.T) {
clock := NewMockClock()
assert.Panics(t, func() { clock.Add(-1) })
}
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