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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package expvar
import (
"json"
"testing"
)
func TestInt(t *testing.T) {
reqs := NewInt("requests")
if reqs.i != 0 {
t.Errorf("reqs.i = %v, want 0", reqs.i)
}
if reqs != Get("requests").(*Int) {
t.Errorf("Get() failed.")
}
reqs.Add(1)
reqs.Add(3)
if reqs.i != 4 {
t.Errorf("reqs.i = %v, want 4", reqs.i)
}
if s := reqs.String(); s != "4" {
t.Errorf("reqs.String() = %q, want \"4\"", s)
}
reqs.Set(-2)
if reqs.i != -2 {
t.Errorf("reqs.i = %v, want -2", reqs.i)
}
}
func TestString(t *testing.T) {
name := NewString("my-name")
if name.s != "" {
t.Errorf("name.s = %q, want \"\"", name.s)
}
name.Set("Mike")
if name.s != "Mike" {
t.Errorf("name.s = %q, want \"Mike\"", name.s)
}
if s := name.String(); s != "\"Mike\"" {
t.Errorf("reqs.String() = %q, want \"\"Mike\"\"", s)
}
}
func TestMapCounter(t *testing.T) {
colours := NewMap("bike-shed-colours")
colours.Add("red", 1)
colours.Add("red", 2)
colours.Add("blue", 4)
if x := colours.m["red"].(*Int).i; x != 3 {
t.Errorf("colours.m[\"red\"] = %v, want 3", x)
}
if x := colours.m["blue"].(*Int).i; x != 4 {
t.Errorf("colours.m[\"blue\"] = %v, want 4", x)
}
// colours.String() should be '{"red":3, "blue":4}',
// though the order of red and blue could vary.
s := colours.String()
var j interface{}
err := json.Unmarshal([]byte(s), &j)
if err != nil {
t.Errorf("colours.String() isn't valid JSON: %v", err)
}
m, ok := j.(map[string]interface{})
if !ok {
t.Error("colours.String() didn't produce a map.")
}
red := m["red"]
x, ok := red.(float64)
if !ok {
t.Error("red.Kind() is not a number.")
}
if x != 3 {
t.Errorf("red = %v, want 3", x)
}
}
func TestIntFunc(t *testing.T) {
x := int64(4)
ix := IntFunc(func() int64 { return x })
if s := ix.String(); s != "4" {
t.Errorf("ix.String() = %v, want 4", s)
}
x++
if s := ix.String(); s != "5" {
t.Errorf("ix.String() = %v, want 5", s)
}
}
func TestStringFunc(t *testing.T) {
x := "hello"
sx := StringFunc(func() string { return x })
if s, exp := sx.String(), `"hello"`; s != exp {
t.Errorf(`sx.String() = %q, want %q`, s, exp)
}
x = "goodbye"
if s, exp := sx.String(), `"goodbye"`; s != exp {
t.Errorf(`sx.String() = %q, want %q`, s, exp)
}
}
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