Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/pkg/util/flowcontrol/throttle_test.go

@@ -0,0 +1,127 @@
+/*
+Copyright 2014 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 (
+	"math"
+	"sync"
+	"testing"
+	"time"
+)
+
+func TestBasicThrottle(t *testing.T) {
+	r := NewTokenBucketRateLimiter(1, 3)
+	for i := 0; i < 3; i++ {
+		if !r.TryAccept() {
+			t.Error("unexpected false accept")
+		}
+	}
+	if r.TryAccept() {
+		t.Error("unexpected true accept")
+	}
+}
+
+func TestIncrementThrottle(t *testing.T) {
+	r := NewTokenBucketRateLimiter(1, 1)
+	if !r.TryAccept() {
+		t.Error("unexpected false accept")
+	}
+	if r.TryAccept() {
+		t.Error("unexpected true accept")
+	}
+
+	// Allow to refill
+	time.Sleep(2 * time.Second)
+
+	if !r.TryAccept() {
+		t.Error("unexpected false accept")
+	}
+}
+
+func TestThrottle(t *testing.T) {
+	r := NewTokenBucketRateLimiter(10, 5)
+
+	// Should consume 5 tokens immediately, then
+	// the remaining 11 should take at least 1 second (0.1s each)
+	expectedFinish := time.Now().Add(time.Second * 1)
+	for i := 0; i < 16; i++ {
+		r.Accept()
+	}
+	if time.Now().Before(expectedFinish) {
+		t.Error("rate limit was not respected, finished too early")
+	}
+}
+
+func TestRateLimiterSaturation(t *testing.T) {
+	const e = 0.000001
+	tests := []struct {
+		capacity int
+		take     int
+
+		expectedSaturation float64
+	}{
+		{1, 1, 1},
+		{10, 3, 0.3},
+	}
+	for i, tt := range tests {
+		rl := NewTokenBucketRateLimiter(1, tt.capacity)
+		for i := 0; i < tt.take; i++ {
+			rl.Accept()
+		}
+		if math.Abs(rl.Saturation()-tt.expectedSaturation) > e {
+			t.Fatalf("#%d: Saturation rate difference isn't within tolerable range\n want=%f, get=%f",
+				i, tt.expectedSaturation, rl.Saturation())
+		}
+	}
+}
+
+func TestAlwaysFake(t *testing.T) {
+	rl := NewFakeAlwaysRateLimiter()
+	if !rl.TryAccept() {
+		t.Error("TryAccept in AlwaysFake should return true.")
+	}
+	// If this will block the test will timeout
+	rl.Accept()
+}
+
+func TestNeverFake(t *testing.T) {
+	rl := NewFakeNeverRateLimiter()
+	if rl.TryAccept() {
+		t.Error("TryAccept in NeverFake should return false.")
+	}
+
+	finished := false
+	wg := sync.WaitGroup{}
+	wg.Add(1)
+	go func() {
+		rl.Accept()
+		finished = true
+		wg.Done()
+	}()
+
+	// Wait some time to make sure it never finished.
+	time.Sleep(time.Second)
+	if finished {
+		t.Error("Accept should block forever in NeverFake.")
+	}
+
+	rl.Stop()
+	wg.Wait()
+	if !finished {
+		t.Error("Stop should make Accept unblock in NeverFake.")
+	}
+}