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// Copyright 2018 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.
// +build !windows,!darwin,!plan9
package cache
import (
"os"
"strings"
"testing"
)
func TestDefaultDir(t *testing.T) {
goCacheDir := "/tmp/test-go-cache"
xdgCacheDir := "/tmp/test-xdg-cache"
homeDir := "/tmp/test-home"
// undo env changes when finished
defer func(GOCACHE, XDG_CACHE_HOME, HOME string) {
os.Setenv("GOCACHE", GOCACHE)
os.Setenv("XDG_CACHE_HOME", XDG_CACHE_HOME)
os.Setenv("HOME", HOME)
}(os.Getenv("GOCACHE"), os.Getenv("XDG_CACHE_HOME"), os.Getenv("HOME"))
os.Setenv("GOCACHE", goCacheDir)
os.Setenv("XDG_CACHE_HOME", xdgCacheDir)
os.Setenv("HOME", homeDir)
dir, showWarnings := defaultDir()
if dir != goCacheDir {
t.Errorf("Cache DefaultDir %q should be $GOCACHE %q", dir, goCacheDir)
}
if !showWarnings {
t.Error("Warnings should be shown when $GOCACHE is set")
}
os.Unsetenv("GOCACHE")
dir, showWarnings = defaultDir()
if !strings.HasPrefix(dir, xdgCacheDir+"/") {
t.Errorf("Cache DefaultDir %q should be under $XDG_CACHE_HOME %q when $GOCACHE is unset", dir, xdgCacheDir)
}
if !showWarnings {
t.Error("Warnings should be shown when $XDG_CACHE_HOME is set")
}
os.Unsetenv("XDG_CACHE_HOME")
dir, showWarnings = defaultDir()
if !strings.HasPrefix(dir, homeDir+"/.cache/") {
t.Errorf("Cache DefaultDir %q should be under $HOME/.cache %q when $GOCACHE and $XDG_CACHE_HOME are unset", dir, homeDir+"/.cache")
}
if !showWarnings {
t.Error("Warnings should be shown when $HOME is not /")
}
os.Unsetenv("HOME")
if dir, _ := defaultDir(); dir != "off" {
t.Error("Cache not disabled when $GOCACHE, $XDG_CACHE_HOME, and $HOME are unset")
}
os.Setenv("HOME", "/")
if _, showWarnings := defaultDir(); showWarnings {
// https://golang.org/issue/26280
t.Error("Cache initalization warnings should be squelched when $GOCACHE and $XDG_CACHE_HOME are unset and $HOME is /")
}
}
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