The core protocol of WoopChain
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woop/internal/utils/testing/tempfile.go

46 lines
1.3 KiB

package testutils
import (
"io"
"io/ioutil"
"os"
"strings"
"testing"
"github.com/pkg/errors"
)
// NewTempFile creates a new, empty temp file for testing. Errors are fatal.
func NewTempFile(t *testing.T) *os.File {
pattern := strings.ReplaceAll(t.Name(), string(os.PathSeparator), "_")
f, err := ioutil.TempFile("", pattern)
if err != nil {
t.Fatal(errors.Wrap(err, "cannot create temp file"))
}
return f
}
// NewTempFileWithContents creates a new, empty temp file for testing,
// with the given contents. The read/write offset is set to the beginning.
// Errors are fatal.
func NewTempFileWithContents(t *testing.T, contents []byte) *os.File {
f := NewTempFile(t)
if _, err := f.Write(contents); err != nil {
t.Fatal(errors.Wrapf(err, "cannot write contents into %s", f.Name()))
}
if _, err := f.Seek(0, io.SeekStart); err != nil {
t.Fatal(errors.Wrapf(err, "cannot rewind test file %s", f.Name()))
}
return f
}
// CloseAndRemoveTempFile closes/removes the temp file. Errors are logged.
func CloseAndRemoveTempFile(t *testing.T, f *os.File) {
fn := f.Name()
if err := f.Close(); err != nil {
t.Log(errors.Wrapf(err, "cannot close test file %s", fn))
}
if err := os.Remove(fn); err != nil {
t.Log(errors.Wrapf(err, "cannot remove test file %s", fn))
}
}