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package fakeclock_test
import (
"time"
"github.com/pivotal-golang/clock/fakeclock"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("FakeTicker", func() {
const Δ = 10 * time.Millisecond
var (
fakeClock *fakeclock.FakeClock
initialTime time.Time
)
BeforeEach(func() {
initialTime = time.Date(2014, 1, 1, 3, 0, 30, 0, time.UTC)
fakeClock = fakeclock.NewFakeClock(initialTime)
})
It("provides a channel that receives the time at each interval", func() {
ticker := fakeClock.NewTicker(10 * time.Second)
timeChan := ticker.C()
Consistently(timeChan, Δ).ShouldNot(Receive())
fakeClock.Increment(5 * time.Second)
Consistently(timeChan, Δ).ShouldNot(Receive())
fakeClock.Increment(4 * time.Second)
Consistently(timeChan, Δ).ShouldNot(Receive())
fakeClock.Increment(1 * time.Second)
Eventually(timeChan).Should(Receive(Equal(initialTime.Add(10 * time.Second))))
fakeClock.Increment(10 * time.Second)
Eventually(timeChan).Should(Receive(Equal(initialTime.Add(20 * time.Second))))
fakeClock.Increment(10 * time.Second)
Eventually(timeChan).Should(Receive(Equal(initialTime.Add(30 * time.Second))))
})
})
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