142 lines
2.9 KiB
Go
142 lines
2.9 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package expvar
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import (
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"encoding/json"
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"testing"
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)
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// RemoveAll removes all exported variables.
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// This is for tests only.
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func RemoveAll() {
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mutex.Lock()
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defer mutex.Unlock()
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vars = make(map[string]Var)
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}
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func TestInt(t *testing.T) {
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RemoveAll()
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reqs := NewInt("requests")
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if reqs.i != 0 {
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t.Errorf("reqs.i = %v, want 0", reqs.i)
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}
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if reqs != Get("requests").(*Int) {
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t.Errorf("Get() failed.")
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}
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reqs.Add(1)
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reqs.Add(3)
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if reqs.i != 4 {
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t.Errorf("reqs.i = %v, want 4", reqs.i)
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}
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if s := reqs.String(); s != "4" {
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t.Errorf("reqs.String() = %q, want \"4\"", s)
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}
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reqs.Set(-2)
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if reqs.i != -2 {
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t.Errorf("reqs.i = %v, want -2", reqs.i)
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}
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}
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func TestFloat(t *testing.T) {
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RemoveAll()
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reqs := NewFloat("requests-float")
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if reqs.f != 0.0 {
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t.Errorf("reqs.f = %v, want 0", reqs.f)
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}
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if reqs != Get("requests-float").(*Float) {
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t.Errorf("Get() failed.")
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}
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reqs.Add(1.5)
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reqs.Add(1.25)
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if reqs.f != 2.75 {
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t.Errorf("reqs.f = %v, want 2.75", reqs.f)
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}
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if s := reqs.String(); s != "2.75" {
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t.Errorf("reqs.String() = %q, want \"4.64\"", s)
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}
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reqs.Add(-2)
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if reqs.f != 0.75 {
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t.Errorf("reqs.f = %v, want 0.75", reqs.f)
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}
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}
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func TestString(t *testing.T) {
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RemoveAll()
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name := NewString("my-name")
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if name.s != "" {
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t.Errorf("name.s = %q, want \"\"", name.s)
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}
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name.Set("Mike")
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if name.s != "Mike" {
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t.Errorf("name.s = %q, want \"Mike\"", name.s)
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}
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if s := name.String(); s != "\"Mike\"" {
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t.Errorf("reqs.String() = %q, want \"\"Mike\"\"", s)
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}
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}
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func TestMapCounter(t *testing.T) {
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RemoveAll()
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colors := NewMap("bike-shed-colors")
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colors.Add("red", 1)
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colors.Add("red", 2)
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colors.Add("blue", 4)
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colors.AddFloat("green", 4.125)
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if x := colors.m["red"].(*Int).i; x != 3 {
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t.Errorf("colors.m[\"red\"] = %v, want 3", x)
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}
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if x := colors.m["blue"].(*Int).i; x != 4 {
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t.Errorf("colors.m[\"blue\"] = %v, want 4", x)
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}
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if x := colors.m["green"].(*Float).f; x != 4.125 {
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t.Errorf("colors.m[\"green\"] = %v, want 3.14", x)
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}
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// colors.String() should be '{"red":3, "blue":4}',
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// though the order of red and blue could vary.
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s := colors.String()
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var j interface{}
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err := json.Unmarshal([]byte(s), &j)
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if err != nil {
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t.Errorf("colors.String() isn't valid JSON: %v", err)
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}
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m, ok := j.(map[string]interface{})
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if !ok {
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t.Error("colors.String() didn't produce a map.")
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}
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red := m["red"]
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x, ok := red.(float64)
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if !ok {
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t.Error("red.Kind() is not a number.")
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}
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if x != 3 {
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t.Errorf("red = %v, want 3", x)
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}
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}
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func TestFunc(t *testing.T) {
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RemoveAll()
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var x interface{} = []string{"a", "b"}
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f := Func(func() interface{} { return x })
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if s, exp := f.String(), `["a","b"]`; s != exp {
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t.Errorf(`f.String() = %q, want %q`, s, exp)
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}
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x = 17
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if s, exp := f.String(), `17`; s != exp {
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t.Errorf(`f.String() = %q, want %q`, s, exp)
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}
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}
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