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// Copyright 2014 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 buildutil_test
import (
"go/build"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
"golang.org/x/tools/go/buildutil"
"golang.org/x/tools/go/packages/packagestest"
)
func TestContainingPackage(t *testing.T) {
if runtime.Compiler == "gccgo" {
t.Skip("gccgo has no GOROOT")
}
exported := packagestest.Export(t, packagestest.GOPATH, []packagestest.Module{
{Name: "golang.org/x/tools/go/buildutil", Files: packagestest.MustCopyFileTree(".")}})
defer exported.Cleanup()
goroot := runtime.GOROOT()
var gopath string
for _, env := range exported.Config.Env {
if !strings.HasPrefix(env, "GOPATH=") {
continue
}
gopath = strings.TrimPrefix(env, "GOPATH=")
}
if gopath == "" {
t.Fatal("Failed to fish GOPATH out of env: ", exported.Config.Env)
}
buildutildir := filepath.Join(gopath, "golang.org", "x", "tools", "go", "buildutil")
type Test struct {
gopath, filename, wantPkg string
}
tests := []Test{
{gopath, goroot + "/src/fmt/print.go", "fmt"},
{gopath, goroot + "/src/encoding/json/foo.go", "encoding/json"},
{gopath, goroot + "/src/encoding/missing/foo.go", "(not found)"},
{gopath, gopath + "/src/golang.org/x/tools/go/buildutil/util_test.go",
"golang.org/x/tools/go/buildutil"},
}
if runtime.GOOS != "windows" && runtime.GOOS != "plan9" {
// Make a symlink to gopath for test
tmp, err := os.MkdirTemp(os.TempDir(), "go")
if err != nil {
t.Errorf("Unable to create a temporary directory in %s", os.TempDir())
}
defer os.RemoveAll(tmp)
// symlink between $GOPATH/src and /tmp/go/src
// in order to test all possible symlink cases
if err := os.Symlink(gopath+"/src", tmp+"/src"); err != nil {
t.Fatal(err)
}
tests = append(tests, []Test{
{gopath, tmp + "/src/golang.org/x/tools/go/buildutil/util_test.go", "golang.org/x/tools/go/buildutil"},
{tmp, gopath + "/src/golang.org/x/tools/go/buildutil/util_test.go", "golang.org/x/tools/go/buildutil"},
{tmp, tmp + "/src/golang.org/x/tools/go/buildutil/util_test.go", "golang.org/x/tools/go/buildutil"},
}...)
}
for _, test := range tests {
var got string
var buildContext = build.Default
buildContext.GOPATH = test.gopath
bp, err := buildutil.ContainingPackage(&buildContext, buildutildir, test.filename)
if err != nil {
got = "(not found)"
} else {
got = bp.ImportPath
}
if got != test.wantPkg {
t.Errorf("ContainingPackage(%q) = %s, want %s", test.filename, got, test.wantPkg)
}
}
}
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