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helpers.go
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/
helpers.go
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package test
import (
"io/ioutil"
"os"
"strings"
"testing"
"time"
)
func CreateTempfile(b []byte, t *testing.T) *os.File {
f, err := ioutil.TempFile(os.TempDir(), "")
if err != nil {
t.Fatal(err)
}
if len(b) > 0 {
_, err = f.Write(b)
if err != nil {
t.Fatal(err)
}
}
return f
}
func DeleteTempfile(f *os.File, t *testing.T) {
if err := os.Remove(f.Name()); err != nil {
t.Fatal(err)
}
}
func WaitForContents(t *testing.T, d time.Duration, p, c string) {
errCh := make(chan error, 1)
matchCh := make(chan struct{}, 1)
stopCh := make(chan struct{}, 1)
var last string
go func() {
for {
select {
case <-stopCh:
return
default:
}
actual, err := ioutil.ReadFile(p)
if err != nil && !os.IsNotExist(err) {
errCh <- err
return
}
last = string(actual)
if strings.EqualFold(last, c) {
close(matchCh)
return
}
time.Sleep(10 * time.Millisecond)
}
}()
select {
case <-matchCh:
case err := <-errCh:
t.Fatal(err)
case <-time.After(d):
close(stopCh)
t.Errorf("contents not present after %s, expected: %q, actual: %q",
d, c, last)
}
}