Imported Upstream version 60upstream/60

1 files changed, 128 insertions, 0 deletions

diff --git a/src/pkg/expvar/expvar_test.go b/src/pkg/expvar/expvar_test.go
new file mode 100644
index 000000000..8f7a48168
--- /dev/null
+++ b/src/pkg/expvar/expvar_test.go
@@ -0,0 +1,128 @@
+// 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 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)
+	}
+}