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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.
// No testdata on Android.
//go:build !android
// +build !android
package eg_test
import (
"bytes"
"flag"
"go/build"
"go/constant"
"go/parser"
"go/token"
"go/types"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
"golang.org/x/tools/go/loader"
"golang.org/x/tools/internal/testenv"
"golang.org/x/tools/refactor/eg"
)
// TODO(adonovan): more tests:
// - of command-line tool
// - of all parts of syntax
// - of applying a template to a package it imports:
// the replacement syntax should use unqualified names for its objects.
var (
updateFlag = flag.Bool("update", false, "update the golden files")
verboseFlag = flag.Bool("verbose", false, "show matcher information")
)
func Test(t *testing.T) {
testenv.NeedsTool(t, "go")
switch runtime.GOOS {
case "windows":
t.Skipf("skipping test on %q (no /usr/bin/diff)", runtime.GOOS)
}
ctx := build.Default // copy
ctx.CgoEnabled = false // don't use cgo
conf := loader.Config{
Fset: token.NewFileSet(),
ParserMode: parser.ParseComments,
Build: &ctx,
}
// Each entry is a single-file package.
// (Multi-file packages aren't interesting for this test.)
// Order matters: each non-template package is processed using
// the preceding template package.
for _, filename := range []string{
"testdata/A.template",
"testdata/A1.go",
"testdata/A2.go",
"testdata/B.template",
"testdata/B1.go",
"testdata/C.template",
"testdata/C1.go",
"testdata/D.template",
"testdata/D1.go",
"testdata/E.template",
"testdata/E1.go",
"testdata/F.template",
"testdata/F1.go",
"testdata/G.template",
"testdata/G1.go",
"testdata/H.template",
"testdata/H1.go",
"testdata/I.template",
"testdata/I1.go",
"testdata/J.template",
"testdata/J1.go",
"testdata/bad_type.template",
"testdata/no_before.template",
"testdata/no_after_return.template",
"testdata/type_mismatch.template",
"testdata/expr_type_mismatch.template",
} {
pkgname := strings.TrimSuffix(filepath.Base(filename), ".go")
conf.CreateFromFilenames(pkgname, filename)
}
iprog, err := conf.Load()
if err != nil {
t.Fatal(err)
}
var xform *eg.Transformer
for _, info := range iprog.Created {
file := info.Files[0]
filename := iprog.Fset.File(file.Pos()).Name() // foo.go
if strings.HasSuffix(filename, "template") {
// a new template
shouldFail, _ := info.Pkg.Scope().Lookup("shouldFail").(*types.Const)
xform, err = eg.NewTransformer(iprog.Fset, info.Pkg, file, &info.Info, *verboseFlag)
if err != nil {
if shouldFail == nil {
t.Errorf("NewTransformer(%s): %s", filename, err)
} else if want := constant.StringVal(shouldFail.Val()); !strings.Contains(normalizeAny(err.Error()), want) {
t.Errorf("NewTransformer(%s): got error %q, want error %q", filename, err, want)
}
} else if shouldFail != nil {
t.Errorf("NewTransformer(%s) succeeded unexpectedly; want error %q",
filename, shouldFail.Val())
}
continue
}
if xform == nil {
t.Errorf("%s: no previous template", filename)
continue
}
// apply previous template to this package
n := xform.Transform(&info.Info, info.Pkg, file)
if n == 0 {
t.Errorf("%s: no matches", filename)
continue
}
gotf, err := os.CreateTemp("", filepath.Base(filename)+"t")
if err != nil {
t.Fatal(err)
}
got := gotf.Name() // foo.got
golden := filename + "lden" // foo.golden
// Write actual output to foo.got.
if err := eg.WriteAST(iprog.Fset, got, file); err != nil {
t.Error(err)
}
defer os.Remove(got)
// Compare foo.got with foo.golden.
var cmd *exec.Cmd
switch runtime.GOOS {
case "plan9":
cmd = exec.Command("/bin/diff", "-c", golden, got)
default:
cmd = exec.Command("/usr/bin/diff", "-u", golden, got)
}
buf := new(bytes.Buffer)
cmd.Stdout = buf
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
t.Errorf("eg tests for %s failed: %s.\n%s\n", filename, err, buf)
if *updateFlag {
t.Logf("Updating %s...", golden)
if err := exec.Command("/bin/cp", got, golden).Run(); err != nil {
t.Errorf("Update failed: %s", err)
}
}
}
}
}
// normalizeAny replaces occurrences of interface{} with any, for consistent
// output.
func normalizeAny(s string) string {
return strings.ReplaceAll(s, "interface{}", "any")
}
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