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go/internal/gcimporter: fix TestImportStdLib

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The test attempted to find all stdlib packages by scanning
pkg/$GOOS_$GOARCH for .a files and then tried to import all of them.
Now that .a files are no longer being placed there, the test is a
noop. Fix this by using go list std (and filtering out testonly
packages) and trying to import all of those to recreate what the test
intended to do.

This also removes a dependency on the pkg/$GOOS_$GOARCH directory
which will stop being produced by dist in CL 453496.

For #47257

Change-Id: I7c1944a89db9da9269def3d64a11408a60d73d46
Reviewed-on: https://go-review.googlesource.com/c/go/+/453858
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Michael Matloob 2022-11-30 12:53:13 -05:00
parent 8fd2875c3e
commit 8ed74ee39a
2 changed files with 52 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
src/cmd/compile/internal/importer/gcimporter_test.go
View File

@ -12,6 +12,7 @@ import (
"internal/goexperiment"
"internal/testenv"
"os"
"os/exec"
"path"
"path/filepath"
"runtime"
@ -60,37 +61,6 @@ func testPath(t *testing.T, path, srcDir string) *types2.Package {
return pkg
}
const maxTime = 30 * time.Second
func testDir(t *testing.T, dir string, endTime time.Time) (nimports int) {
dirname := filepath.Join(testenv.GOROOT(t), "pkg", runtime.GOOS+"_"+runtime.GOARCH, dir)
list, err := os.ReadDir(dirname)
if err != nil {
t.Fatalf("testDir(%s): %s", dirname, err)
}
for _, f := range list {
if time.Now().After(endTime) {
t.Log("testing time used up")
return
}
switch {
case !f.IsDir():
// try extensions
for _, ext := range pkgExts {
if strings.HasSuffix(f.Name(), ext) {
name := f.Name()[0 : len(f.Name())-len(ext)] // remove extension
if testPath(t, filepath.Join(dir, name), dir) != nil {
nimports++
}
}
}
case f.IsDir():
nimports += testDir(t, filepath.Join(dir, f.Name()), endTime)
}
}
return
}
func mktmpdir(t *testing.T) string {
tmpdir, err := os.MkdirTemp("", "gcimporter_test")
if err != nil {
@ -235,6 +205,9 @@ func TestVersionHandling(t *testing.T) {
}
func TestImportStdLib(t *testing.T) {
if testing.Short() {
t.Skip("the imports can be expensive, and this test is especially slow when the build cache is empty")
}
testenv.MustHaveGoBuild(t)
// This package only handles gc export data.
@ -242,11 +215,29 @@ func TestImportStdLib(t *testing.T) {
t.Skipf("gc-built packages not available (compiler = %s)", runtime.Compiler)
}
dt := maxTime
if testing.Short() && testenv.Builder() == "" {
dt = 10 * time.Millisecond
// Get list of packages in stdlib. Filter out test-only packages with {{if .GoFiles}} check.
var stderr bytes.Buffer
cmd := exec.Command("go", "list", "-f", "{{if .GoFiles}}{{.ImportPath}}{{end}}", "std")
cmd.Stderr = &stderr
out, err := cmd.Output()
if err != nil {
t.Fatalf("failed to run go list to determine stdlib packages: %v\nstderr:\n%v", err, stderr.String())
}
nimports := testDir(t, "", time.Now().Add(dt)) // installed packages
pkgs := strings.Fields(string(out))
var nimports int
for _, pkg := range pkgs {
t.Run(pkg, func(t *testing.T) {
if testPath(t, pkg, filepath.Join(testenv.GOROOT(t), "src", path.Dir(pkg))) != nil {
nimports++
}
})
}
const minPkgs = 225 // 'GOOS=plan9 go1.18 list std | wc -l' reports 228; most other platforms have more.
if len(pkgs) < minPkgs {
t.Fatalf("too few packages (%d) were imported", nimports)
}
t.Logf("tested %d imports", nimports)
}

61
src/go/internal/gcimporter/gcimporter_test.go
View File

@ -10,6 +10,7 @@ import (
"internal/goexperiment"
"internal/testenv"
"os"
"os/exec"
"path"
"path/filepath"
"runtime"
@ -68,39 +69,8 @@ func testPath(t *testing.T, path, srcDir string) *types.Package {
return pkg
}
const maxTime = 30 * time.Second
var pkgExts = [...]string{".a", ".o"} // keep in sync with gcimporter.go
func testDir(t *testing.T, dir string, endTime time.Time) (nimports int) {
dirname := filepath.Join(testenv.GOROOT(t), "pkg", runtime.GOOS+"_"+runtime.GOARCH, dir)
list, err := os.ReadDir(dirname)
if err != nil {
t.Fatalf("testDir(%s): %s", dirname, err)
}
for _, f := range list {
if time.Now().After(endTime) {
t.Log("testing time used up")
return
}
switch {
case !f.IsDir():
// try extensions
for _, ext := range pkgExts {
if strings.HasSuffix(f.Name(), ext) {
name := f.Name()[0 : len(f.Name())-len(ext)] // remove extension
if testPath(t, filepath.Join(dir, name), dir) != nil {
nimports++
}
}
}
case f.IsDir():
nimports += testDir(t, filepath.Join(dir, f.Name()), endTime)
}
}
return
}
func mktmpdir(t *testing.T) string {
tmpdir, err := os.MkdirTemp("", "gcimporter_test")
if err != nil {
@ -370,6 +340,9 @@ func TestVersionHandling(t *testing.T) {
}
func TestImportStdLib(t *testing.T) {
if testing.Short() {
t.Skip("the imports can be expensive, and this test is especially slow when the build cache is empty")
}
testenv.MustHaveGoBuild(t)
// This package only handles gc export data.
@ -377,11 +350,29 @@ func TestImportStdLib(t *testing.T) {
t.Skipf("gc-built packages not available (compiler = %s)", runtime.Compiler)
}
dt := maxTime
if testing.Short() && testenv.Builder() == "" {
dt = 10 * time.Millisecond
// Get list of packages in stdlib. Filter out test-only packages with {{if .GoFiles}} check.
var stderr bytes.Buffer
cmd := exec.Command("go", "list", "-f", "{{if .GoFiles}}{{.ImportPath}}{{end}}", "std")
cmd.Stderr = &stderr
out, err := cmd.Output()
if err != nil {
t.Fatalf("failed to run go list to determine stdlib packages: %v\nstderr:\n%v", err, stderr.String())
}
nimports := testDir(t, "", time.Now().Add(dt)) // installed packages
pkgs := strings.Fields(string(out))
var nimports int
for _, pkg := range pkgs {
t.Run(pkg, func(t *testing.T) {
if testPath(t, pkg, filepath.Join(testenv.GOROOT(t), "src", path.Dir(pkg))) != nil {
nimports++
}
})
}
const minPkgs = 225 // 'GOOS=plan9 go1.18 list std | wc -l' reports 228; most other platforms have more.
if len(pkgs) < minPkgs {
t.Fatalf("too few packages (%d) were imported", nimports)
}
t.Logf("tested %d imports", nimports)
}