finish testing client/cache

pkg/client/cache/fifo_test.go

@@ -0,0 +1,83 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+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 cache
+
+import (
+	"testing"
+	"time"
+)
+
+func TestFIFO_basic(t *testing.T) {
+	f := NewFIFO()
+	const amount = 500
+	go func() {
+		for i := 0; i < amount; i++ {
+			f.Add(string([]rune{'a', rune(i)}), i+1)
+		}
+	}()
+	go func() {
+		for u := uint(0); u < amount; u++ {
+			f.Add(string([]rune{'b', rune(u)}), u+1)
+		}
+	}()
+
+	lastInt := int(0)
+	lastUint := uint(0)
+	for i := 0; i < amount*2; i++ {
+		switch obj := f.Pop().(type) {
+		case int:
+			if obj <= lastInt {
+				t.Errorf("got %v (int) out of order, last was %v", obj, lastInt)
+			}
+			lastInt = obj
+		case uint:
+			if obj <= lastUint {
+				t.Errorf("got %v (uint) out of order, last was %v", obj, lastUint)
+			} else {
+				lastUint = obj
+			}
+		default:
+			t.Fatalf("unexpected type %#v", obj)
+		}
+	}
+}
+
+func TestFIFO_addUpdate(t *testing.T) {
+	f := NewFIFO()
+	f.Add("foo", 10)
+	f.Update("foo", 15)
+	got := make(chan int, 2)
+	go func() {
+		for {
+			got <- f.Pop().(int)
+		}
+	}()
+
+	first := <-got
+	if e, a := 15, first; e != a {
+		t.Errorf("Didn't get updated value (%v), got %v", e, a)
+	}
+	select {
+	case unexpected := <-got:
+		t.Errorf("Got second value %v", unexpected)
+	case <-time.After(50 * time.Millisecond):
+	}
+	_, exists := f.Get("foo")
+	if exists {
+		t.Errorf("item did not get removed")
+	}
+}