add unit tests for NewFromMap and EncodeAsString methods

container/mts/meta/meta_test.go

@@ -219,3 +219,35 @@ func TestKeys(t *testing.T) {
 		t.Errorf("Did not get expected out. \nGot : %v, \nWant: %v\n", got, want)
 	}
 }
+
+// TestNewFromMap checks that we can successfully create a new data struct from a map.
+func TestNewFromMap(t *testing.T) {
+	want := map[string]string{
+		"loc": "a,b,c",
+		"ts":  "12345",
+	}
+
+	meta := NewFromMap(want)
+
+	got := meta.All()
+
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("Did not get expected out. \nGot : %v, \nWant: %v\n", got, want)
+	}
+}
+
+// TestEncodeAsString checks that metadata is correctly encoded as a string.
+func TestEncodeAsString(t *testing.T) {
+	meta := NewFromMap(map[string]string{
+		"loc": "a,b,c",
+		"ts":  "12345",
+	})
+
+	got := meta.EncodeAsString()
+	want1 := "loc=a,b,c\tts=12345"
+	want2 := "ts=12345\tloc=a,b,c"
+
+	if got != want1 && got != want2 {
+		t.Errorf("Did not get expected out. \nGot : %v, \nWant: %v or %v\n", got, want1, want2)
+	}
+}