add test case

1 files changed, 35 insertions, 0 deletions

diff --git a/skate/xio/util_test.go b/skate/xio/util_test.go
new file mode 100644
index 0000000..b1e06a5
--- /dev/null
+++ b/skate/xio/util_test.go
@@ -0,0 +1,35 @@
+package xio
+
+import (
+	"io/ioutil"
+	"testing"
+)
+
+func TestOpenTwo(t *testing.T) {
+	a, err := tempFile(t)
+	if err != nil {
+		t.Fatalf("failed to create tmp file: %v", err)
+	}
+	b, err := tempFile(t)
+	if err != nil {
+		t.Fatalf("failed to create tmp file: %v", err)
+	}
+	f1, f2, err := OpenTwo(a, b)
+	if err != nil {
+		t.Fatalf("failed to OpenTwo: %v", err)
+	}
+	defer f1.Close()
+	defer f2.Close()
+}
+
+// tempFile creates an empty temporary file and returns its name on success.
+func tempFile(t *testing.T) (filename string, err error) {
+	f, err := ioutil.TempFile(t.TempDir(), "")
+	if err != nil {
+		return "", err
+	}
+	if err := f.Close(); err != nil {
+		return "", err
+	}
+	return f.Name(), nil
+}