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// Copyright 2022 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 testenv_test
import (
"internal/platform"
"internal/testenv"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
)
func TestGoToolLocation(t *testing.T) {
testenv.MustHaveGoBuild(t)
var exeSuffix string
if runtime.GOOS == "windows" {
exeSuffix = ".exe"
}
// Tests are defined to run within their package source directory,
// and this package's source directory is $GOROOT/src/internal/testenv.
// The 'go' command is installed at $GOROOT/bin/go, so if the environment
// is correct then testenv.GoTool() should be identical to ../../../bin/go.
relWant := "../../../bin/go" + exeSuffix
absWant, err := filepath.Abs(relWant)
if err != nil {
t.Fatal(err)
}
wantInfo, err := os.Stat(absWant)
if err != nil {
t.Fatal(err)
}
t.Logf("found go tool at %q (%q)", relWant, absWant)
goTool, err := testenv.GoTool()
if err != nil {
t.Fatalf("testenv.GoTool(): %v", err)
}
t.Logf("testenv.GoTool() = %q", goTool)
gotInfo, err := os.Stat(goTool)
if err != nil {
t.Fatal(err)
}
if !os.SameFile(wantInfo, gotInfo) {
t.Fatalf("%q is not the same file as %q", absWant, goTool)
}
}
func TestHasGoBuild(t *testing.T) {
if !testenv.HasGoBuild() {
switch runtime.GOOS {
case "js", "wasip1":
// No exec syscall, so these shouldn't be able to 'go build'.
t.Logf("HasGoBuild is false on %s", runtime.GOOS)
return
}
b := testenv.Builder()
if b == "" {
// We shouldn't make assumptions about what kind of sandbox or build
// environment external Go users may be running in.
t.Skipf("skipping: 'go build' unavailable")
}
// Since we control the Go builders, we know which ones ought
// to be able to run 'go build'. Check that they can.
//
// (Note that we don't verify that any builders *can't* run 'go build'.
// If a builder starts running 'go build' tests when it shouldn't,
// we will presumably find out about it when those tests fail.)
switch runtime.GOOS {
case "ios":
if isCorelliumBuilder(b) {
// The corellium environment is self-hosting, so it should be able
// to build even though real "ios" devices can't exec.
} else {
// The usual iOS sandbox does not allow the app to start another
// process. If we add builders on stock iOS devices, they presumably
// will not be able to exec, so we may as well allow that now.
t.Logf("HasGoBuild is false on %s", b)
return
}
case "android":
if isEmulatedBuilder(b) && platform.MustLinkExternal(runtime.GOOS, runtime.GOARCH, false) {
// As of 2023-05-02, the test environment on the emulated builders is
// missing a C linker.
t.Logf("HasGoBuild is false on %s", b)
return
}
}
if strings.Contains(b, "-noopt") {
// The -noopt builder sets GO_GCFLAGS, which causes tests of 'go build' to
// be skipped.
t.Logf("HasGoBuild is false on %s", b)
return
}
t.Fatalf("HasGoBuild unexpectedly false on %s", b)
}
t.Logf("HasGoBuild is true; checking consistency with other functions")
hasExec := false
hasExecGo := false
t.Run("MustHaveExec", func(t *testing.T) {
testenv.MustHaveExec(t)
hasExec = true
})
t.Run("MustHaveExecPath", func(t *testing.T) {
testenv.MustHaveExecPath(t, "go")
hasExecGo = true
})
if !hasExec {
t.Errorf(`MustHaveExec(t) skipped unexpectedly`)
}
if !hasExecGo {
t.Errorf(`MustHaveExecPath(t, "go") skipped unexpectedly`)
}
dir := t.TempDir()
mainGo := filepath.Join(dir, "main.go")
if err := os.WriteFile(mainGo, []byte("package main\nfunc main() {}\n"), 0644); err != nil {
t.Fatal(err)
}
cmd := testenv.Command(t, "go", "build", "-o", os.DevNull, mainGo)
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("%v: %v\n%s", cmd, err, out)
}
}
func TestMustHaveExec(t *testing.T) {
hasExec := false
t.Run("MustHaveExec", func(t *testing.T) {
testenv.MustHaveExec(t)
t.Logf("MustHaveExec did not skip")
hasExec = true
})
switch runtime.GOOS {
case "js", "wasip1":
if hasExec {
// js and wasip1 lack an “exec” syscall.
t.Errorf("expected MustHaveExec to skip on %v", runtime.GOOS)
}
case "ios":
if b := testenv.Builder(); isCorelliumBuilder(b) && !hasExec {
// Most ios environments can't exec, but the corellium builder can.
t.Errorf("expected MustHaveExec not to skip on %v", b)
}
default:
if b := testenv.Builder(); b != "" && !hasExec {
t.Errorf("expected MustHaveExec not to skip on %v", b)
}
}
}
func TestCleanCmdEnvPWD(t *testing.T) {
// Test that CleanCmdEnv sets PWD if cmd.Dir is set.
switch runtime.GOOS {
case "plan9", "windows":
t.Skipf("PWD is not used on %s", runtime.GOOS)
}
dir := t.TempDir()
cmd := testenv.Command(t, testenv.GoToolPath(t), "help")
cmd.Dir = dir
cmd = testenv.CleanCmdEnv(cmd)
for _, env := range cmd.Env {
if strings.HasPrefix(env, "PWD=") {
pwd := strings.TrimPrefix(env, "PWD=")
if pwd != dir {
t.Errorf("unexpected PWD: want %s, got %s", dir, pwd)
}
return
}
}
t.Error("PWD not set in cmd.Env")
}
func isCorelliumBuilder(builderName string) bool {
// Support both the old infra's builder names and the LUCI builder names.
// The former's names are ad-hoc so we could maintain this invariant on
// the builder side. The latter's names are structured, and "corellium" will
// appear as a "host" suffix after the GOOS and GOARCH, which always begin
// with an underscore.
return strings.HasSuffix(builderName, "-corellium") || strings.Contains(builderName, "_corellium")
}
func isEmulatedBuilder(builderName string) bool {
// Support both the old infra's builder names and the LUCI builder names.
// The former's names are ad-hoc so we could maintain this invariant on
// the builder side. The latter's names are structured, and the signifier
// of emulation "emu" will appear as a "host" suffix after the GOOS and
// GOARCH because it modifies the run environment in such a way that it
// the target GOOS and GOARCH may not match the host. This suffix always
// begins with an underscore.
return strings.HasSuffix(builderName, "-emu") || strings.Contains(builderName, "_emu")
}
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