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// Copyright 2013 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 main
import (
"fmt"
"go/build"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
)
// Unit tests for internal guru functions
func TestIssue17515(t *testing.T) {
// Tests handling of symlinks in function guessImportPath
// If we have Go code inside $HOME/go/src and create a symlink $HOME/src to it
// there are 4 possible cases that need to be tested:
// (1) absolute & absolute: GOPATH=$HOME/go/src file=$HOME/go/src/test/test.go
// (2) absolute & symlink: GOPATH=$HOME/go/src file=$HOME/src/test/test.go
// (3) symlink & symlink: GOPATH=$HOME/src file=$HOME/src/test/test.go
// (4) symlink & absolute: GOPATH=$HOME/src file= $HOME/go/src/test/test.go
// Create a temporary home directory under /tmp
home, err := ioutil.TempDir(os.TempDir(), "home")
if err != nil {
t.Errorf("Unable to create a temporary directory in %s", os.TempDir())
}
defer os.RemoveAll(home)
// create filepath /tmp/home/go/src/test/test.go
if err = os.MkdirAll(home+"/go/src/test", 0755); err != nil {
t.Fatal(err)
}
var buildContext = build.Default
// Success test cases
type SuccessTest struct {
gopath, filename, wantSrcdir string
}
successTests := []SuccessTest{
{home + "/go", home + "/go/src/test/test.go", filepath.FromSlash(home + "/go/src")},
}
// Add symlink cases if not on Windows, Plan 9
if runtime.GOOS != "windows" && runtime.GOOS != "plan9" {
// symlink between /tmp/home/go/src and /tmp/home/src
if err := os.Symlink(home+"/go/src", home+"/src"); err != nil {
t.Fatal(err)
}
successTests = append(successTests, []SuccessTest{
{home + "/go", home + "/src/test/test.go", filepath.FromSlash(home + "/go/src")},
{home, home + "/go/src/test/test.go", filepath.FromSlash(home + "/src")},
{home, home + "/src/test/test.go", filepath.FromSlash(home + "/src")},
}...)
}
for _, test := range successTests {
buildContext.GOPATH = test.gopath
srcdir, importPath, err := guessImportPath(test.filename, &buildContext)
if srcdir != test.wantSrcdir || importPath != "test" || err != nil {
t.Errorf("guessImportPath(%q, %q) = %q, %q, %q; want %q, %q, %q",
test.filename, test.gopath, srcdir, importPath, err, test.wantSrcdir, "test", "nil")
}
}
// Function to format expected error message
errFormat := func(fpath string) string {
return fmt.Sprintf("can't evaluate symlinks of %s", fpath)
}
// Failure test cases
type FailTest struct {
gopath, filename, wantErr string
}
failTests := []FailTest{
{home + "/go", home + "/go/src/fake/test.go", errFormat(filepath.FromSlash(home + "/go/src/fake"))},
}
if runtime.GOOS != "windows" && runtime.GOOS != "plan9" {
failTests = append(failTests, []FailTest{
{home + "/go", home + "/src/fake/test.go", errFormat(filepath.FromSlash(home + "/src/fake"))},
{home, home + "/src/fake/test.go", errFormat(filepath.FromSlash(home + "/src/fake"))},
{home, home + "/go/src/fake/test.go", errFormat(filepath.FromSlash(home + "/go/src/fake"))},
}...)
}
for _, test := range failTests {
buildContext.GOPATH = test.gopath
srcdir, importPath, err := guessImportPath(test.filename, &buildContext)
if !strings.HasPrefix(fmt.Sprint(err), test.wantErr) {
t.Errorf("guessImportPath(%q, %q) = %q, %q, %q; want %q, %q, %q",
test.filename, test.gopath, srcdir, importPath, err, "", "", test.wantErr)
}
}
}
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