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package dockerfile // import "github.com/docker/docker/builder/dockerfile"
import (
"io/ioutil"
"os"
"path/filepath"
"testing"
)
// createTestTempDir creates a temporary directory for testing.
// It returns the created path and a cleanup function which is meant to be used as deferred call.
// When an error occurs, it terminates the test.
func createTestTempDir(t *testing.T, dir, prefix string) (string, func()) {
path, err := ioutil.TempDir(dir, prefix)
if err != nil {
t.Fatalf("Error when creating directory %s with prefix %s: %s", dir, prefix, err)
}
return path, func() {
err = os.RemoveAll(path)
if err != nil {
t.Fatalf("Error when removing directory %s: %s", path, err)
}
}
}
// createTestTempFile creates a temporary file within dir with specific contents and permissions.
// When an error occurs, it terminates the test
func createTestTempFile(t *testing.T, dir, filename, contents string, perm os.FileMode) string {
filePath := filepath.Join(dir, filename)
err := ioutil.WriteFile(filePath, []byte(contents), perm)
if err != nil {
t.Fatalf("Error when creating %s file: %s", filename, err)
}
return filePath
}
// createTestSymlink creates a symlink file within dir which points to oldname
func createTestSymlink(t *testing.T, dir, filename, oldname string) string {
filePath := filepath.Join(dir, filename)
if err := os.Symlink(oldname, filePath); err != nil {
t.Fatalf("Error when creating %s symlink to %s: %s", filename, oldname, err)
}
return filePath
}
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