1 // Copyright 2014 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 // No testdata on Android.
26 "golang.org/x/tools/go/loader"
27 "golang.org/x/tools/internal/testenv"
28 "golang.org/x/tools/refactor/eg"
31 // TODO(adonovan): more tests:
32 // - of command-line tool
33 // - of all parts of syntax
34 // - of applying a template to a package it imports:
35 // the replacement syntax should use unqualified names for its objects.
38 updateFlag = flag.Bool("update", false, "update the golden files")
39 verboseFlag = flag.Bool("verbose", false, "show matcher information")
42 func Test(t *testing.T) {
43 testenv.NeedsTool(t, "go")
47 t.Skipf("skipping test on %q (no /usr/bin/diff)", runtime.GOOS)
50 conf := loader.Config{
51 Fset: token.NewFileSet(),
52 ParserMode: parser.ParseComments,
55 // Each entry is a single-file package.
56 // (Multi-file packages aren't interesting for this test.)
57 // Order matters: each non-template package is processed using
58 // the preceding template package.
59 for _, filename := range []string{
60 "testdata/A.template",
64 "testdata/B.template",
67 "testdata/C.template",
70 "testdata/D.template",
73 "testdata/E.template",
76 "testdata/F.template",
79 "testdata/G.template",
82 "testdata/H.template",
85 "testdata/I.template",
88 "testdata/J.template",
91 "testdata/bad_type.template",
92 "testdata/no_before.template",
93 "testdata/no_after_return.template",
94 "testdata/type_mismatch.template",
95 "testdata/expr_type_mismatch.template",
97 pkgname := strings.TrimSuffix(filepath.Base(filename), ".go")
98 conf.CreateFromFilenames(pkgname, filename)
100 iprog, err := conf.Load()
105 var xform *eg.Transformer
106 for _, info := range iprog.Created {
107 file := info.Files[0]
108 filename := iprog.Fset.File(file.Pos()).Name() // foo.go
110 if strings.HasSuffix(filename, "template") {
112 shouldFail, _ := info.Pkg.Scope().Lookup("shouldFail").(*types.Const)
113 xform, err = eg.NewTransformer(iprog.Fset, info.Pkg, file, &info.Info, *verboseFlag)
115 if shouldFail == nil {
116 t.Errorf("NewTransformer(%s): %s", filename, err)
117 } else if want := constant.StringVal(shouldFail.Val()); !strings.Contains(err.Error(), want) {
118 t.Errorf("NewTransformer(%s): got error %q, want error %q", filename, err, want)
120 } else if shouldFail != nil {
121 t.Errorf("NewTransformer(%s) succeeded unexpectedly; want error %q",
122 filename, shouldFail.Val())
128 t.Errorf("%s: no previous template", filename)
132 // apply previous template to this package
133 n := xform.Transform(&info.Info, info.Pkg, file)
135 t.Errorf("%s: no matches", filename)
139 gotf, err := ioutil.TempFile("", filepath.Base(filename)+"t")
143 got := gotf.Name() // foo.got
144 golden := filename + "lden" // foo.golden
146 // Write actual output to foo.got.
147 if err := eg.WriteAST(iprog.Fset, got, file); err != nil {
152 // Compare foo.got with foo.golden.
154 switch runtime.GOOS {
156 cmd = exec.Command("/bin/diff", "-c", golden, got)
158 cmd = exec.Command("/usr/bin/diff", "-u", golden, got)
160 buf := new(bytes.Buffer)
162 cmd.Stderr = os.Stderr
163 if err := cmd.Run(); err != nil {
164 t.Errorf("eg tests for %s failed: %s.\n%s\n", filename, err, buf)
167 t.Logf("Updating %s...", golden)
168 if err := exec.Command("/bin/cp", got, golden).Run(); err != nil {
169 t.Errorf("Update failed: %s", err)