Create init method on provider interface

vendor/code.cloudfoundry.org/clock/clock.go

@@ -0,0 +1,53 @@
+package clock
+
+import "time"
+
+type Clock interface {
+	Now() time.Time
+	Sleep(d time.Duration)
+	Since(t time.Time) time.Duration
+	// After waits for the duration to elapse and then sends the current time
+	// on the returned channel.
+	// It is equivalent to clock.NewTimer(d).C.
+	// The underlying Timer is not recovered by the garbage collector
+	// until the timer fires. If efficiency is a concern, use clock.NewTimer
+	// instead and call Timer.Stop if the timer is no longer needed.
+	After(d time.Duration) <-chan time.Time
+
+	NewTimer(d time.Duration) Timer
+	NewTicker(d time.Duration) Ticker
+}
+
+type realClock struct{}
+
+func NewClock() Clock {
+	return &realClock{}
+}
+
+func (clock *realClock) Now() time.Time {
+	return time.Now()
+}
+
+func (clock *realClock) Since(t time.Time) time.Duration {
+	return time.Now().Sub(t)
+}
+
+func (clock *realClock) Sleep(d time.Duration) {
+	<-clock.NewTimer(d).C()
+}
+
+func (clock *realClock) After(d time.Duration) <-chan time.Time {
+	return clock.NewTimer(d).C()
+}
+
+func (clock *realClock) NewTimer(d time.Duration) Timer {
+	return &realTimer{
+		t: time.NewTimer(d),
+	}
+}
+
+func (clock *realClock) NewTicker(d time.Duration) Ticker {
+	return &realTicker{
+		t: time.NewTicker(d),
+	}
+}