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https://github.com/golang/go
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519474451a
This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
130 lines
2.6 KiB
Go
130 lines
2.6 KiB
Go
// Copyright 2011 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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// license that can be found in the LICENSE file.
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package main
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import (
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"go/ast"
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"go/parser"
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"strings"
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"testing"
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)
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type testCase struct {
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Name string
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Fn func(*ast.File) bool
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In string
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Out string
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}
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var testCases []testCase
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func addTestCases(t []testCase, fn func(*ast.File) bool) {
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// Fill in fn to avoid repetition in definitions.
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if fn != nil {
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for i := range t {
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if t[i].Fn == nil {
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t[i].Fn = fn
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}
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}
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}
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testCases = append(testCases, t...)
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}
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func fnop(*ast.File) bool { return false }
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func parseFixPrint(t *testing.T, fn func(*ast.File) bool, desc, in string, mustBeGofmt bool) (out string, fixed, ok bool) {
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file, err := parser.ParseFile(fset, desc, in, parserMode)
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if err != nil {
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t.Errorf("%s: parsing: %v", desc, err)
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return
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}
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outb, err := gofmtFile(file)
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if err != nil {
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t.Errorf("%s: printing: %v", desc, err)
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return
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}
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if s := string(outb); in != s && mustBeGofmt {
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t.Errorf("%s: not gofmt-formatted.\n--- %s\n%s\n--- %s | gofmt\n%s",
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desc, desc, in, desc, s)
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tdiff(t, in, s)
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return
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}
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if fn == nil {
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for _, fix := range fixes {
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if fix.f(file) {
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fixed = true
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}
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}
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} else {
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fixed = fn(file)
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}
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outb, err = gofmtFile(file)
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if err != nil {
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t.Errorf("%s: printing: %v", desc, err)
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return
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}
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return string(outb), fixed, true
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}
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func TestRewrite(t *testing.T) {
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for _, tt := range testCases {
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// Apply fix: should get tt.Out.
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out, fixed, ok := parseFixPrint(t, tt.Fn, tt.Name, tt.In, true)
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if !ok {
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continue
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}
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// reformat to get printing right
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out, _, ok = parseFixPrint(t, fnop, tt.Name, out, false)
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if !ok {
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continue
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}
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if out != tt.Out {
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t.Errorf("%s: incorrect output.\n", tt.Name)
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if !strings.HasPrefix(tt.Name, "testdata/") {
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t.Errorf("--- have\n%s\n--- want\n%s", out, tt.Out)
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}
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tdiff(t, out, tt.Out)
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continue
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}
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if changed := out != tt.In; changed != fixed {
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t.Errorf("%s: changed=%v != fixed=%v", tt.Name, changed, fixed)
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continue
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}
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// Should not change if run again.
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out2, fixed2, ok := parseFixPrint(t, tt.Fn, tt.Name+" output", out, true)
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if !ok {
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continue
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}
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if fixed2 {
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t.Errorf("%s: applied fixes during second round", tt.Name)
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continue
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}
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if out2 != out {
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t.Errorf("%s: changed output after second round of fixes.\n--- output after first round\n%s\n--- output after second round\n%s",
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tt.Name, out, out2)
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tdiff(t, out, out2)
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}
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}
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}
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func tdiff(t *testing.T, a, b string) {
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data, err := diff([]byte(a), []byte(b))
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if err != nil {
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t.Error(err)
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return
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}
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t.Error(string(data))
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}
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