Adding upstream version 1.2.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

wrapio/wrapio_test.go

@@ -0,0 +1,44 @@
+package wrapio
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+func TestWrapper(t *testing.T) {
+	if file, err := ioutil.TempFile("", "wrap.test"); err == nil {
+		defer os.Remove(file.Name())
+		defer file.Close()
+		file.Write([]byte("abcdef"))
+
+		data := make([]byte, 12)
+
+		w := NewWrapper(file, 6, 1, 6)
+		if n, err := w.ReadAt(data, 1); err == nil || err == io.EOF {
+			if !bytes.Equal(data[:n], []byte("cdefa")) {
+				t.Errorf("Exp cdefa, Got %s", data[:n])
+			}
+		} else {
+			t.Error(err.Error())
+		}
+	}
+}
+
+func TestWrap(t *testing.T) {
+	if file, err := ioutil.TempFile("", "wrap.test"); err == nil {
+		w := NewWrapWriter(file, 0, 3)
+		w.Write([]byte("abcdef"))
+
+		r := NewWrapReader(file, 0, 2)
+		data := make([]byte, 6)
+		r.Read(data)
+		if !bytes.Equal(data, []byte("dedede")) {
+			t.Error("Wrapper error!")
+		}
+		file.Close()
+		os.Remove(file.Name())
+	}
+}