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env GO111MODULE=off
# Test that cached test results are invalidated in response to
# changes to the external inputs to the test.
[short] skip
[GODEBUG:gocacheverify=1] skip
# We're testing cache behavior, so start with a clean GOCACHE.
env GOCACHE=$WORK/cache
# Build a helper binary to invoke os.Chtimes.
go build -o mkold$GOEXE mkold.go
# Make test input files appear to be a minute old.
exec ./mkold$GOEXE 1m testcache/file.txt
exec ./mkold$GOEXE 1m testcache/script.sh
# If the test reads an environment variable, changes to that variable
# should invalidate cached test results.
env TESTKEY=x
go test testcache -run=TestLookupEnv
go test testcache -run=TestLookupEnv
stdout '\(cached\)'
env TESTKEY=y
go test testcache -run=TestLookupEnv
! stdout '\(cached\)'
go test testcache -run=TestLookupEnv
stdout '\(cached\)'
# Changes in arguments forwarded to the test should invalidate cached test
# results.
go test testcache -run=TestOSArgs -v hello
! stdout '\(cached\)'
stdout 'hello'
go test testcache -run=TestOSArgs -v goodbye
! stdout '\(cached\)'
stdout 'goodbye'
# golang.org/issue/36134: that includes the `-timeout` argument.
go test testcache -run=TestOSArgs -timeout=20m -v
! stdout '\(cached\)'
stdout '-test\.timeout[= ]20m'
go test testcache -run=TestOSArgs -timeout=5s -v
! stdout '\(cached\)'
stdout '-test\.timeout[= ]5s'
# If the test stats a file, changes to the file should invalidate the cache.
go test testcache -run=FileSize
go test testcache -run=FileSize
stdout '\(cached\)'
cp 4x.txt testcache/file.txt
go test testcache -run=FileSize
! stdout '\(cached\)'
go test testcache -run=FileSize
stdout '\(cached\)'
# Files should be tracked even if the test changes its working directory.
go test testcache -run=Chdir
go test testcache -run=Chdir
stdout '\(cached\)'
cp 6x.txt testcache/file.txt
go test testcache -run=Chdir
! stdout '\(cached\)'
go test testcache -run=Chdir
stdout '\(cached\)'
# The content of files should affect caching, provided that the mtime also changes.
exec ./mkold$GOEXE 1m testcache/file.txt
go test testcache -run=FileContent
go test testcache -run=FileContent
stdout '\(cached\)'
cp 2y.txt testcache/file.txt
exec ./mkold$GOEXE 50s testcache/file.txt
go test testcache -run=FileContent
! stdout '\(cached\)'
go test testcache -run=FileContent
stdout '\(cached\)'
# Directory contents read via os.ReadDirNames should affect caching.
go test testcache -run=DirList
go test testcache -run=DirList
stdout '\(cached\)'
rm testcache/file.txt
go test testcache -run=DirList
! stdout '\(cached\)'
go test testcache -run=DirList
stdout '\(cached\)'
# Files outside GOROOT and GOPATH should not affect caching.
env TEST_EXTERNAL_FILE=$WORK/external.txt
go test testcache -run=ExternalFile
go test testcache -run=ExternalFile
stdout '\(cached\)'
rm $WORK/external.txt
go test testcache -run=ExternalFile
stdout '\(cached\)'
# Executables within GOROOT and GOPATH should affect caching,
# even if the test does not stat them explicitly.
[!exec:/bin/sh] skip
chmod 0755 ./testcache/script.sh
exec ./mkold$GOEXEC 1m testcache/script.sh
go test testcache -run=Exec
go test testcache -run=Exec
stdout '\(cached\)'
exec ./mkold$GOEXE 50s testcache/script.sh
go test testcache -run=Exec
! stdout '\(cached\)'
go test testcache -run=Exec
stdout '\(cached\)'
-- testcache/file.txt --
xx
-- 4x.txt --
xxxx
-- 6x.txt --
xxxxxx
-- 2y.txt --
yy
-- $WORK/external.txt --
This file is outside of GOPATH.
-- testcache/script.sh --
#!/bin/sh
exit 0
-- testcache/testcache_test.go --
// Copyright 2017 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 testcache
import (
"io"
"os"
"testing"
)
func TestChdir(t *testing.T) {
os.Chdir("..")
defer os.Chdir("testcache")
info, err := os.Stat("testcache/file.txt")
if err != nil {
t.Fatal(err)
}
if info.Size()%2 != 1 {
t.Fatal("even file")
}
}
func TestOddFileContent(t *testing.T) {
f, err := os.Open("file.txt")
if err != nil {
t.Fatal(err)
}
data, err := io.ReadAll(f)
f.Close()
if err != nil {
t.Fatal(err)
}
if len(data)%2 != 1 {
t.Fatal("even file")
}
}
func TestOddFileSize(t *testing.T) {
info, err := os.Stat("file.txt")
if err != nil {
t.Fatal(err)
}
if info.Size()%2 != 1 {
t.Fatal("even file")
}
}
func TestOddGetenv(t *testing.T) {
val := os.Getenv("TESTKEY")
if len(val)%2 != 1 {
t.Fatal("even env value")
}
}
func TestLookupEnv(t *testing.T) {
_, ok := os.LookupEnv("TESTKEY")
if !ok {
t.Fatal("env missing")
}
}
func TestDirList(t *testing.T) {
f, err := os.Open(".")
if err != nil {
t.Fatal(err)
}
f.Readdirnames(-1)
f.Close()
}
func TestExec(t *testing.T) {
// Note: not using os/exec to make sure there is no unexpected stat.
p, err := os.StartProcess("./script.sh", []string{"script"}, new(os.ProcAttr))
if err != nil {
t.Fatal(err)
}
ps, err := p.Wait()
if err != nil {
t.Fatal(err)
}
if !ps.Success() {
t.Fatalf("script failed: %v", err)
}
}
func TestExternalFile(t *testing.T) {
os.Open(os.Getenv("TEST_EXTERNAL_FILE"))
_, err := os.Stat(os.Getenv("TEST_EXTERNAL_FILE"))
if err != nil {
t.Fatal(err)
}
}
func TestOSArgs(t *testing.T) {
t.Log(os.Args)
}
-- mkold.go --
package main
import (
"log"
"os"
"time"
)
func main() {
d, err := time.ParseDuration(os.Args[1])
if err != nil {
log.Fatal(err)
}
path := os.Args[2]
old := time.Now().Add(-d)
err = os.Chtimes(path, old, old)
if err != nil {
log.Fatal(err)
}
}
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