mirror of
https://github.com/golang/go
synced 2024-11-05 18:36:10 -07:00
4968197297
Fix a nil pointer dereference by checking the error returned by conf.Load. Bug was reported on Reddit: https://www.reddit.com/r/golang/comments/5vo0fb/ Change-Id: I2ad6f03922b772f03e282a0af6eea24f8de9cef8 Reviewed-on: https://go-review.googlesource.com/37432 Reviewed-by: Alan Donovan <adonovan@google.com>
445 lines
9.5 KiB
Go
445 lines
9.5 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// licence that can be found in the LICENSE file.
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package rename
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import (
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"fmt"
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"go/build"
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"go/token"
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"io/ioutil"
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"path/filepath"
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"reflect"
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"regexp"
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"runtime"
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"strings"
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"testing"
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"golang.org/x/tools/go/buildutil"
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)
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func TestErrors(t *testing.T) {
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tests := []struct {
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ctxt *build.Context
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from, to string
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want string // regexp to match error, or "OK"
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}{
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// Simple example.
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{
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ctxt: fakeContext(map[string][]string{
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"foo": {`package foo; type T int`},
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"bar": {`package bar`},
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"main": {`package main
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import "foo"
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var _ foo.T
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`},
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}),
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from: "foo", to: "bar",
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want: `invalid move destination: bar conflicts with directory .go.src.bar`,
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},
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// Subpackage already exists.
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{
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ctxt: fakeContext(map[string][]string{
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"foo": {`package foo; type T int`},
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"foo/sub": {`package sub`},
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"bar/sub": {`package sub`},
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"main": {`package main
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import "foo"
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var _ foo.T
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`},
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}),
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from: "foo", to: "bar",
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want: "invalid move destination: bar; package or subpackage bar/sub already exists",
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},
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// Invalid base name.
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{
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ctxt: fakeContext(map[string][]string{
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"foo": {`package foo; type T int`},
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"main": {`package main
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import "foo"
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var _ foo.T
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`},
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}),
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from: "foo", to: "bar-v2.0",
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want: "invalid move destination: bar-v2.0; gomvpkg does not " +
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"support move destinations whose base names are not valid " +
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"go identifiers",
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},
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{
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ctxt: fakeContext(map[string][]string{
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"foo": {``},
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"bar": {`package bar`},
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}),
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from: "foo", to: "bar",
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want: `no initial packages were loaded`,
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},
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}
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for _, test := range tests {
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ctxt := test.ctxt
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got := make(map[string]string)
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writeFile = func(filename string, content []byte) error {
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got[filename] = string(content)
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return nil
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}
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moveDirectory = func(from, to string) error {
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for path, contents := range got {
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if strings.HasPrefix(path, from) {
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newPath := strings.Replace(path, from, to, 1)
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delete(got, path)
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got[newPath] = contents
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}
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}
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return nil
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}
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err := Move(ctxt, test.from, test.to, "")
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prefix := fmt.Sprintf("-from %q -to %q", test.from, test.to)
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if err == nil {
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t.Errorf("%s: nil error. Expected error: %s", prefix, test.want)
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continue
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}
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matched, err2 := regexp.MatchString(test.want, err.Error())
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if err2 != nil {
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t.Errorf("regexp.MatchString failed %s", err2)
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continue
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}
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if !matched {
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t.Errorf("%s: conflict does not match expectation:\n"+
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"Error: %q\n"+
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"Pattern: %q",
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prefix, err.Error(), test.want)
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}
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}
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}
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func TestMoves(t *testing.T) {
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if runtime.GOOS == "windows" {
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t.Skip("broken on Windows; see golang.org/issue/16384")
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}
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tests := []struct {
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ctxt *build.Context
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from, to string
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want map[string]string
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wantWarnings []string
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}{
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// Simple example.
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{
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ctxt: fakeContext(map[string][]string{
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"foo": {`package foo; type T int`},
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"main": {`package main
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import "foo"
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var _ foo.T
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`},
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}),
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from: "foo", to: "bar",
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want: map[string]string{
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"/go/src/main/0.go": `package main
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import "bar"
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var _ bar.T
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`,
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"/go/src/bar/0.go": `package bar
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type T int
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`,
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},
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},
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// Example with subpackage.
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{
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ctxt: fakeContext(map[string][]string{
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"foo": {`package foo; type T int`},
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"foo/sub": {`package sub; type T int`},
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"main": {`package main
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import "foo"
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import "foo/sub"
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var _ foo.T
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var _ sub.T
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`},
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}),
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from: "foo", to: "bar",
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want: map[string]string{
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"/go/src/main/0.go": `package main
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import "bar"
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import "bar/sub"
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var _ bar.T
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var _ sub.T
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`,
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"/go/src/bar/0.go": `package bar
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type T int
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`,
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"/go/src/bar/sub/0.go": `package sub; type T int`,
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},
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},
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// References into subpackages
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{
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ctxt: fakeContext(map[string][]string{
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"foo": {`package foo; import "foo/a"; var _ a.T`},
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"foo/a": {`package a; type T int`},
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"foo/b": {`package b; import "foo/a"; var _ a.T`},
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}),
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from: "foo", to: "bar",
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want: map[string]string{
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"/go/src/bar/0.go": `package bar
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import "bar/a"
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var _ a.T
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`,
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"/go/src/bar/a/0.go": `package a; type T int`,
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"/go/src/bar/b/0.go": `package b
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import "bar/a"
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var _ a.T
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`,
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},
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},
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// External test packages
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{
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ctxt: buildutil.FakeContext(map[string]map[string]string{
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"foo": {
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"0.go": `package foo; type T int`,
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"0_test.go": `package foo_test; import "foo"; var _ foo.T`,
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},
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"baz": {
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"0_test.go": `package baz_test; import "foo"; var _ foo.T`,
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},
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}),
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from: "foo", to: "bar",
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want: map[string]string{
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"/go/src/bar/0.go": `package bar
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type T int
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`,
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"/go/src/bar/0_test.go": `package bar_test
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import "bar"
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var _ bar.T
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`,
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"/go/src/baz/0_test.go": `package baz_test
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import "bar"
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var _ bar.T
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`,
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},
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},
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// package import comments
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{
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ctxt: fakeContext(map[string][]string{"foo": {`package foo // import "baz"`}}),
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from: "foo", to: "bar",
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want: map[string]string{"/go/src/bar/0.go": `package bar // import "bar"
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`},
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},
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{
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ctxt: fakeContext(map[string][]string{"foo": {`package foo /* import "baz" */`}}),
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from: "foo", to: "bar",
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want: map[string]string{"/go/src/bar/0.go": `package bar /* import "bar" */
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`},
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},
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{
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ctxt: fakeContext(map[string][]string{"foo": {`package foo // import "baz"`}}),
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from: "foo", to: "bar",
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want: map[string]string{"/go/src/bar/0.go": `package bar // import "bar"
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`},
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},
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{
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ctxt: fakeContext(map[string][]string{"foo": {`package foo
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// import " this is not an import comment`}}),
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from: "foo", to: "bar",
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want: map[string]string{"/go/src/bar/0.go": `package bar
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// import " this is not an import comment
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`},
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},
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{
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ctxt: fakeContext(map[string][]string{"foo": {`package foo
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/* import " this is not an import comment */`}}),
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from: "foo", to: "bar",
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want: map[string]string{"/go/src/bar/0.go": `package bar
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/* import " this is not an import comment */
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`},
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},
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// Import name conflict generates a warning, not an error.
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{
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ctxt: fakeContext(map[string][]string{
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"x": {},
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"a": {`package a; type A int`},
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"b": {`package b; type B int`},
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"conflict": {`package conflict
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import "a"
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import "b"
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var _ a.A
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var _ b.B
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`},
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"ok": {`package ok
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import "b"
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var _ b.B
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`},
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}),
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from: "b", to: "x/a",
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want: map[string]string{
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"/go/src/a/0.go": `package a; type A int`,
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"/go/src/ok/0.go": `package ok
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import "x/a"
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var _ a.B
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`,
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"/go/src/conflict/0.go": `package conflict
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import "a"
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import "x/a"
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var _ a.A
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var _ b.B
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`,
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"/go/src/x/a/0.go": `package a
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type B int
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`,
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},
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wantWarnings: []string{
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`/go/src/conflict/0.go:4:8: renaming this imported package name "b" to "a"`,
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`/go/src/conflict/0.go:3:8: conflicts with imported package name in same block`,
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`/go/src/conflict/0.go:3:8: skipping update of this file`,
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},
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},
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// Rename with same base name.
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{
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ctxt: fakeContext(map[string][]string{
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"x": {},
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"y": {},
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"x/foo": {`package foo
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type T int
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`},
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"main": {`package main; import "x/foo"; var _ foo.T`},
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}),
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from: "x/foo", to: "y/foo",
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want: map[string]string{
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"/go/src/y/foo/0.go": `package foo
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type T int
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`,
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"/go/src/main/0.go": `package main
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import "y/foo"
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var _ foo.T
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`,
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},
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},
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}
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for _, test := range tests {
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ctxt := test.ctxt
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got := make(map[string]string)
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// Populate got with starting file set. rewriteFile and moveDirectory
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// will mutate got to produce resulting file set.
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buildutil.ForEachPackage(ctxt, func(importPath string, err error) {
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if err != nil {
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return
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}
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path := filepath.Join("/go/src", importPath, "0.go")
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if !buildutil.FileExists(ctxt, path) {
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return
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}
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f, err := ctxt.OpenFile(path)
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if err != nil {
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t.Errorf("unexpected error opening file: %s", err)
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return
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}
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bytes, err := ioutil.ReadAll(f)
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f.Close()
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if err != nil {
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t.Errorf("unexpected error reading file: %s", err)
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return
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}
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got[path] = string(bytes)
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})
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var warnings []string
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reportError = func(posn token.Position, message string) {
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warning := fmt.Sprintf("%s:%d:%d: %s",
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filepath.ToSlash(posn.Filename), // for MS Windows
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posn.Line,
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posn.Column,
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message)
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warnings = append(warnings, warning)
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}
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writeFile = func(filename string, content []byte) error {
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got[filename] = string(content)
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return nil
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}
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moveDirectory = func(from, to string) error {
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for path, contents := range got {
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if strings.HasPrefix(path, from) {
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newPath := strings.Replace(path, from, to, 1)
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delete(got, path)
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got[newPath] = contents
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}
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}
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return nil
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}
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err := Move(ctxt, test.from, test.to, "")
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prefix := fmt.Sprintf("-from %q -to %q", test.from, test.to)
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if err != nil {
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t.Errorf("%s: unexpected error: %s", prefix, err)
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continue
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}
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if !reflect.DeepEqual(warnings, test.wantWarnings) {
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t.Errorf("%s: unexpected warnings:\n%s\nwant:\n%s",
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prefix,
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strings.Join(warnings, "\n"),
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strings.Join(test.wantWarnings, "\n"))
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}
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for file, wantContent := range test.want {
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k := filepath.FromSlash(file)
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gotContent, ok := got[k]
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delete(got, k)
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if !ok {
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// TODO(matloob): some testcases might have files that won't be
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// rewritten
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t.Errorf("%s: file %s not rewritten", prefix, file)
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continue
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}
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if gotContent != wantContent {
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t.Errorf("%s: rewritten file %s does not match expectation; got <<<%s>>>\n"+
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"want <<<%s>>>", prefix, file, gotContent, wantContent)
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}
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}
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// got should now be empty
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for file := range got {
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t.Errorf("%s: unexpected rewrite of file %s", prefix, file)
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}
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}
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}
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