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// Copyright 2010 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 os_test
import (
. "os"
"reflect"
"strings"
"testing"
)
// testGetenv gives us a controlled set of variables for testing Expand.
func testGetenv(s string) string {
switch s {
case "*":
return "all the args"
case "#":
return "NARGS"
case "$":
return "PID"
case "1":
return "ARGUMENT1"
case "HOME":
return "/usr/gopher"
case "H":
return "(Value of H)"
case "home_1":
return "/usr/foo"
case "_":
return "underscore"
}
return ""
}
var expandTests = []struct {
in, out string
}{
{"", ""},
{"$*", "all the args"},
{"$$", "PID"},
{"${*}", "all the args"},
{"$1", "ARGUMENT1"},
{"${1}", "ARGUMENT1"},
{"now is the time", "now is the time"},
{"$HOME", "/usr/gopher"},
{"$home_1", "/usr/foo"},
{"${HOME}", "/usr/gopher"},
{"${H}OME", "(Value of H)OME"},
{"A$$$#$1$H$home_1*B", "APIDNARGSARGUMENT1(Value of H)/usr/foo*B"},
}
func TestExpand(t *testing.T) {
for _, test := range expandTests {
result := Expand(test.in, testGetenv)
if result != test.out {
t.Errorf("Expand(%q)=%q; expected %q", test.in, result, test.out)
}
}
}
func TestConsistentEnviron(t *testing.T) {
e0 := Environ()
for i := 0; i < 10; i++ {
e1 := Environ()
if !reflect.DeepEqual(e0, e1) {
t.Fatalf("environment changed")
}
}
}
func TestUnsetenv(t *testing.T) {
const testKey = "GO_TEST_UNSETENV"
set := func() bool {
prefix := testKey + "="
for _, key := range Environ() {
if strings.HasPrefix(key, prefix) {
return true
}
}
return false
}
if err := Setenv(testKey, "1"); err != nil {
t.Fatalf("Setenv: %v", err)
}
if !set() {
t.Error("Setenv didn't set TestUnsetenv")
}
if err := Unsetenv(testKey); err != nil {
t.Fatalf("Unsetenv: %v", err)
}
if set() {
t.Fatal("Unsetenv didn't clear TestUnsetenv")
}
}
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