Subversion Repositories openrisc

// 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 (
        "encoding/json"
        "testing"
)

// RemoveAll removes all exported variables.
// This is for tests only.
func RemoveAll() {
        mutex.Lock()
        defer mutex.Unlock()
        vars = make(map[string]Var)
}

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 TestFloat(t *testing.T) {
        reqs := NewFloat("requests-float")
        if reqs.f != 0.0 {
                t.Errorf("reqs.f = %v, want 0", reqs.f)
        }
        if reqs != Get("requests-float").(*Float) {
                t.Errorf("Get() failed.")
        }

        reqs.Add(1.5)
        reqs.Add(1.25)
        if reqs.f != 2.75 {
                t.Errorf("reqs.f = %v, want 2.75", reqs.f)
        }

        if s := reqs.String(); s != "2.75" {
                t.Errorf("reqs.String() = %q, want \"4.64\"", s)
        }

        reqs.Add(-2)
        if reqs.f != 0.75 {
                t.Errorf("reqs.f = %v, want 0.75", reqs.f)
        }
}

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) {
        colors := NewMap("bike-shed-colors")

        colors.Add("red", 1)
        colors.Add("red", 2)
        colors.Add("blue", 4)
        colors.AddFloat("green", 4.125)
        if x := colors.m["red"].(*Int).i; x != 3 {
                t.Errorf("colors.m[\"red\"] = %v, want 3", x)
        }
        if x := colors.m["blue"].(*Int).i; x != 4 {
                t.Errorf("colors.m[\"blue\"] = %v, want 4", x)
        }
        if x := colors.m["green"].(*Float).f; x != 4.125 {
                t.Errorf("colors.m[\"green\"] = %v, want 3.14", x)
        }

        // colors.String() should be '{"red":3, "blue":4}',
        // though the order of red and blue could vary.
        s := colors.String()
        var j interface{}
        err := json.Unmarshal([]byte(s), &j)
        if err != nil {
                t.Errorf("colors.String() isn't valid JSON: %v", err)
        }
        m, ok := j.(map[string]interface{})
        if !ok {
                t.Error("colors.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 TestFunc(t *testing.T) {
        var x interface{} = []string{"a", "b"}
        f := Func(func() interface{} { return x })
        if s, exp := f.String(), `["a","b"]`; s != exp {
                t.Errorf(`f.String() = %q, want %q`, s, exp)
        }

        x = 17
        if s, exp := f.String(), `17`; s != exp {
                t.Errorf(`f.String() = %q, want %q`, s, exp)
        }
}