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cmd/compile/internal/types2: review of check_test.go

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The changes between (equivalent, and reviewed) go/types/check_test.go
and check_test.go can be seen by comparing patchset 1 and 2. The actual
changes are removing the "// UNREVIEWED" marker, and minor adjustments
to get the code slightly closer to go/types/check_test.go.

The primary differences compared to go/types are:
- use of syntax rather than go/ast package
- re-implemented mechanism for error matching and elimination
  based on the syntax.ErrorMap mechanism (there's no exported
  access to the syntax scanner)
- error matching permits for column tolerances because types2
  column information doesn't match go/types column information

Change-Id: I8ae6bc93dfa2b517673b642064a1f09166755286
Reviewed-on: https://go-review.googlesource.com/c/go/+/305573
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
This commit is contained in:
Robert Griesemer 2021-03-29 12:33:45 -07:00
parent 6454b2720f
commit a1e4657d5a
1 changed files with 27 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
src/cmd/compile/internal/types2/check_test.go
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@ -1,4 +1,3 @@
// UNREVIEWED
// 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.
@ -29,9 +28,7 @@ package types2_test
import (
"cmd/compile/internal/syntax"
"flag"
"fmt"
"internal/testenv"
"io/ioutil"
"os"
"path/filepath"
"regexp"
@ -73,6 +70,7 @@ func unpackError(err error) syntax.Error {
}
}
// delta returns the absolute difference between x and y.
func delta(x, y uint) uint {
switch {
case x < y:
@ -98,17 +96,17 @@ func asGoVersion(s string) string {
return ""
}
func checkFiles(t *testing.T, sources []string, goVersion string, colDelta uint, trace bool) {
if len(sources) == 0 {
func checkFiles(t *testing.T, filenames []string, goVersion string, colDelta uint, trace bool) {
if len(filenames) == 0 {
t.Fatal("no source files")
}
var mode syntax.Mode
if strings.HasSuffix(sources[0], ".go2") {
if strings.HasSuffix(filenames[0], ".go2") {
mode |= syntax.AllowGenerics
}
// parse files and collect parser errors
files, errlist := parseFiles(t, sources, mode)
files, errlist := parseFiles(t, filenames, mode)
pkgName := "<no package>"
if len(files) > 0 {
@ -133,7 +131,7 @@ func checkFiles(t *testing.T, sources []string, goVersion string, colDelta uint,
conf.AcceptMethodTypeParams = true
conf.InferFromConstraints = true
// special case for importC.src
if len(sources) == 1 && strings.HasSuffix(sources[0], "importC.src") {
if len(filenames) == 1 && strings.HasSuffix(filenames[0], "importC.src") {
conf.FakeImportC = true
}
conf.Trace = trace
@ -156,7 +154,7 @@ func checkFiles(t *testing.T, sources []string, goVersion string, colDelta uint,
// collect expected errors
errmap := make(map[string]map[uint][]syntax.Error)
for _, filename := range sources {
for _, filename := range filenames {
f, err := os.Open(filename)
if err != nil {
t.Error(err)
@ -169,16 +167,16 @@ func checkFiles(t *testing.T, sources []string, goVersion string, colDelta uint,
}
// match against found errors
// TODO(gri) sort err list to avoid mismatched when having multiple errors
for _, err := range errlist {
got := unpackError(err)
// find list of errors for the respective error line
filename := got.Pos.Base().Filename()
filemap := errmap[filename]
var line uint
line := got.Pos.Line()
var list []syntax.Error
if filemap != nil {
line = got.Pos.Line()
list = filemap[line]
}
// list may be nil
@ -210,6 +208,7 @@ func checkFiles(t *testing.T, sources []string, goVersion string, colDelta uint,
// eliminate from list
if n := len(list) - 1; n > 0 {
// not the last entry - swap in last element and shorten list by 1
// TODO(gri) avoid changing the order of entries
list[index] = list[n]
filemap[line] = list[:n]
} else {
@ -247,48 +246,41 @@ func TestCheck(t *testing.T) {
checkFiles(t, strings.Split(*testFiles, ","), *goVersion, 0, testing.Verbose())
}
func TestTestdata(t *testing.T) { DefPredeclaredTestFuncs(); testDir(t, 75, "testdata") } // TODO(gri) narrow column tolerance
func TestExamples(t *testing.T) { testDir(t, 0, "examples") }
func TestFixedbugs(t *testing.T) { testDir(t, 0, "fixedbugs") }
// TODO(gri) go/types has an extra TestLongConstants test
func testDir(t *testing.T, colDelta uint, dir string) {
func TestTestdata(t *testing.T) { DefPredeclaredTestFuncs(); testDir(t, "testdata", 75) } // TODO(gri) narrow column tolerance
func TestExamples(t *testing.T) { testDir(t, "examples", 0) }
func TestFixedbugs(t *testing.T) { testDir(t, "fixedbugs", 0) }
func testDir(t *testing.T, dir string, colDelta uint) {
testenv.MustHaveGoBuild(t)
fis, err := ioutil.ReadDir(dir)
fis, err := os.ReadDir(dir)
if err != nil {
t.Error(err)
return
}
for count, fi := range fis {
for _, fi := range fis {
path := filepath.Join(dir, fi.Name())
// if fi is a directory, its files make up a single package
var filenames []string
if fi.IsDir() {
if testing.Verbose() {
fmt.Printf("%3d %s\n", count, path)
}
fis, err := ioutil.ReadDir(path)
fis, err := os.ReadDir(path)
if err != nil {
t.Error(err)
continue
}
files := make([]string, len(fis))
for i, fi := range fis {
// if fi is a directory, checkFiles below will complain
files[i] = filepath.Join(path, fi.Name())
if testing.Verbose() {
fmt.Printf("\t%s\n", files[i])
}
for _, fi := range fis {
filenames = append(filenames, filepath.Join(path, fi.Name()))
}
checkFiles(t, files, "", colDelta, false)
continue
} else {
filenames = []string{path}
}
// otherwise, fi is a stand-alone file
if testing.Verbose() {
fmt.Printf("%3d %s\n", count, path)
}
checkFiles(t, []string{path}, "", colDelta, false)
t.Run(filepath.Base(path), func(t *testing.T) {
checkFiles(t, filenames, *goVersion, colDelta, false)
})
}
}