Add vendor folder to git

vendor/k8s.io/client-go/util/flowcontrol/backoff_test.go

@@ -0,0 +1,195 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package flowcontrol
+
+import (
+	"testing"
+	"time"
+
+	"k8s.io/apimachinery/pkg/util/clock"
+)
+
+func TestSlowBackoff(t *testing.T) {
+	id := "_idSlow"
+	tc := clock.NewFakeClock(time.Now())
+	step := time.Second
+	maxDuration := 50 * step
+
+	b := NewFakeBackOff(step, maxDuration, tc)
+	cases := []time.Duration{0, 1, 2, 4, 8, 16, 32, 50, 50, 50}
+	for ix, c := range cases {
+		tc.Step(step)
+		w := b.Get(id)
+		if w != c*step {
+			t.Errorf("input: '%d': expected %s, got %s", ix, c*step, w)
+		}
+		b.Next(id, tc.Now())
+	}
+
+	//Now confirm that the Reset cancels backoff.
+	b.Next(id, tc.Now())
+	b.Reset(id)
+	if b.Get(id) != 0 {
+		t.Errorf("Reset didn't clear the backoff.")
+	}
+
+}
+
+func TestBackoffReset(t *testing.T) {
+	id := "_idReset"
+	tc := clock.NewFakeClock(time.Now())
+	step := time.Second
+	maxDuration := step * 5
+	b := NewFakeBackOff(step, maxDuration, tc)
+	startTime := tc.Now()
+
+	// get to backoff = maxDuration
+	for i := 0; i <= int(maxDuration/step); i++ {
+		tc.Step(step)
+		b.Next(id, tc.Now())
+	}
+
+	// backoff should be capped at maxDuration
+	if !b.IsInBackOffSince(id, tc.Now()) {
+		t.Errorf("expected to be in Backoff got %s", b.Get(id))
+	}
+
+	lastUpdate := tc.Now()
+	tc.Step(2*maxDuration + step) // time += 11s, 11 > 2*maxDuration
+	if b.IsInBackOffSince(id, lastUpdate) {
+		t.Errorf("expected to not be in Backoff after reset (start=%s, now=%s, lastUpdate=%s), got %s", startTime, tc.Now(), lastUpdate, b.Get(id))
+	}
+}
+
+func TestBackoffHightWaterMark(t *testing.T) {
+	id := "_idHiWaterMark"
+	tc := clock.NewFakeClock(time.Now())
+	step := time.Second
+	maxDuration := 5 * step
+	b := NewFakeBackOff(step, maxDuration, tc)
+
+	// get to backoff = maxDuration
+	for i := 0; i <= int(maxDuration/step); i++ {
+		tc.Step(step)
+		b.Next(id, tc.Now())
+	}
+
+	// backoff high watermark expires after 2*maxDuration
+	tc.Step(maxDuration + step)
+	b.Next(id, tc.Now())
+
+	if b.Get(id) != maxDuration {
+		t.Errorf("expected Backoff to stay at high watermark %s got %s", maxDuration, b.Get(id))
+	}
+}
+
+func TestBackoffGC(t *testing.T) {
+	id := "_idGC"
+	tc := clock.NewFakeClock(time.Now())
+	step := time.Second
+	maxDuration := 5 * step
+
+	b := NewFakeBackOff(step, maxDuration, tc)
+
+	for i := 0; i <= int(maxDuration/step); i++ {
+		tc.Step(step)
+		b.Next(id, tc.Now())
+	}
+	lastUpdate := tc.Now()
+	tc.Step(maxDuration + step)
+	b.GC()
+	_, found := b.perItemBackoff[id]
+	if !found {
+		t.Errorf("expected GC to skip entry, elapsed time=%s maxDuration=%s", tc.Now().Sub(lastUpdate), maxDuration)
+	}
+
+	tc.Step(maxDuration + step)
+	b.GC()
+	r, found := b.perItemBackoff[id]
+	if found {
+		t.Errorf("expected GC of entry after %s got entry %v", tc.Now().Sub(lastUpdate), r)
+	}
+}
+
+func TestIsInBackOffSinceUpdate(t *testing.T) {
+	id := "_idIsInBackOffSinceUpdate"
+	tc := clock.NewFakeClock(time.Now())
+	step := time.Second
+	maxDuration := 10 * step
+	b := NewFakeBackOff(step, maxDuration, tc)
+	startTime := tc.Now()
+
+	cases := []struct {
+		tick      time.Duration
+		inBackOff bool
+		value     int
+	}{
+		{tick: 0, inBackOff: false, value: 0},
+		{tick: 1, inBackOff: false, value: 1},
+		{tick: 2, inBackOff: true, value: 2},
+		{tick: 3, inBackOff: false, value: 2},
+		{tick: 4, inBackOff: true, value: 4},
+		{tick: 5, inBackOff: true, value: 4},
+		{tick: 6, inBackOff: true, value: 4},
+		{tick: 7, inBackOff: false, value: 4},
+		{tick: 8, inBackOff: true, value: 8},
+		{tick: 9, inBackOff: true, value: 8},
+		{tick: 10, inBackOff: true, value: 8},
+		{tick: 11, inBackOff: true, value: 8},
+		{tick: 12, inBackOff: true, value: 8},
+		{tick: 13, inBackOff: true, value: 8},
+		{tick: 14, inBackOff: true, value: 8},
+		{tick: 15, inBackOff: false, value: 8},
+		{tick: 16, inBackOff: true, value: 10},
+		{tick: 17, inBackOff: true, value: 10},
+		{tick: 18, inBackOff: true, value: 10},
+		{tick: 19, inBackOff: true, value: 10},
+		{tick: 20, inBackOff: true, value: 10},
+		{tick: 21, inBackOff: true, value: 10},
+		{tick: 22, inBackOff: true, value: 10},
+		{tick: 23, inBackOff: true, value: 10},
+		{tick: 24, inBackOff: true, value: 10},
+		{tick: 25, inBackOff: false, value: 10},
+		{tick: 26, inBackOff: true, value: 10},
+		{tick: 27, inBackOff: true, value: 10},
+		{tick: 28, inBackOff: true, value: 10},
+		{tick: 29, inBackOff: true, value: 10},
+		{tick: 30, inBackOff: true, value: 10},
+		{tick: 31, inBackOff: true, value: 10},
+		{tick: 32, inBackOff: true, value: 10},
+		{tick: 33, inBackOff: true, value: 10},
+		{tick: 34, inBackOff: true, value: 10},
+		{tick: 35, inBackOff: false, value: 10},
+		{tick: 56, inBackOff: false, value: 0},
+		{tick: 57, inBackOff: false, value: 1},
+	}
+
+	for _, c := range cases {
+		tc.SetTime(startTime.Add(c.tick * step))
+		if c.inBackOff != b.IsInBackOffSinceUpdate(id, tc.Now()) {
+			t.Errorf("expected IsInBackOffSinceUpdate %v got %v at tick %s", c.inBackOff, b.IsInBackOffSinceUpdate(id, tc.Now()), c.tick*step)
+		}
+
+		if c.inBackOff && (time.Duration(c.value)*step != b.Get(id)) {
+			t.Errorf("expected backoff value=%s got %s at tick %s", time.Duration(c.value)*step, b.Get(id), c.tick*step)
+		}
+
+		if !c.inBackOff {
+			b.Next(id, tc.Now())
+		}
+	}
+}