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// Copyright 2011 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 (
"bytes"
"io/ioutil"
"path/filepath"
"strings"
"testing"
)
func runTest(t *testing.T, in, out, flags string) {
// process flags
*simplifyAST = false
*rewriteRule = ""
stdin := false
for _, flag := range strings.Split(flags, " ") {
elts := strings.SplitN(flag, "=", 2)
name := elts[0]
value := ""
if len(elts) == 2 {
value = elts[1]
}
switch name {
case "":
// no flags
case "-r":
*rewriteRule = value
case "-s":
*simplifyAST = true
case "-stdin":
// fake flag - pretend input is from stdin
stdin = true
default:
t.Errorf("unrecognized flag name: %s", name)
}
}
initParserMode()
initRewrite()
var buf bytes.Buffer
err := processFile(in, nil, &buf, stdin)
if err != nil {
t.Error(err)
return
}
expected, err := ioutil.ReadFile(out)
if err != nil {
t.Error(err)
return
}
if got := buf.Bytes(); !bytes.Equal(got, expected) {
t.Errorf("(gofmt %s) != %s (see %s.gofmt)", in, out, in)
d, err := diff(expected, got)
if err == nil {
t.Errorf("%s", d)
}
if err := ioutil.WriteFile(in+".gofmt", got, 0666); err != nil {
t.Error(err)
}
}
}
var tests = []struct {
in, flags string
}{
{"gofmt.go", ""},
{"gofmt_test.go", ""},
{"testdata/composites.input", "-s"},
{"testdata/slices1.input", "-s"},
{"testdata/slices2.input", "-s"},
{"testdata/old.input", ""},
{"testdata/rewrite1.input", "-r=Foo->Bar"},
{"testdata/rewrite2.input", "-r=int->bool"},
{"testdata/rewrite3.input", "-r=x->x"},
{"testdata/rewrite4.input", "-r=(x)->x"},
{"testdata/rewrite5.input", "-r=x+x->2*x"},
{"testdata/rewrite6.input", "-r=fun(x)->Fun(x)"},
{"testdata/rewrite7.input", "-r=fun(x...)->Fun(x)"},
{"testdata/rewrite8.input", "-r=interface{}->int"},
{"testdata/stdin*.input", "-stdin"},
{"testdata/comments.input", ""},
{"testdata/import.input", ""},
{"testdata/crlf.input", ""}, // test case for issue 3961; see also TestCRLF
{"testdata/typeswitch.input", ""}, // test case for issue 4470
}
func TestRewrite(t *testing.T) {
for _, test := range tests {
match, err := filepath.Glob(test.in)
if err != nil {
t.Error(err)
continue
}
for _, in := range match {
out := in
if strings.HasSuffix(in, ".input") {
out = in[:len(in)-len(".input")] + ".golden"
}
runTest(t, in, out, test.flags)
if in != out {
// Check idempotence.
runTest(t, out, out, test.flags)
}
}
}
}
func TestCRLF(t *testing.T) {
const input = "testdata/crlf.input" // must contain CR/LF's
const golden = "testdata/crlf.golden" // must not contain any CR's
data, err := ioutil.ReadFile(input)
if err != nil {
t.Error(err)
}
if bytes.Index(data, []byte("\r\n")) < 0 {
t.Errorf("%s contains no CR/LF's", input)
}
data, err = ioutil.ReadFile(golden)
if err != nil {
t.Error(err)
}
if bytes.Index(data, []byte("\r")) >= 0 {
t.Errorf("%s contains CR's", golden)
}
}
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