diff --git a/gaurun/notification_test.go b/gaurun/notification_test.go
new file mode 100644
index 0000000..74c033f
--- /dev/null
+++ b/gaurun/notification_test.go
@@ -0,0 +1,81 @@
+package gaurun
+
+import (
+	"errors"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestValidateNotification(t *testing.T) {
+	cases := []struct {
+		Notification RequestGaurunNotification
+		Expected     error
+	}{
+		// positive cases
+		{
+			RequestGaurunNotification{
+				Tokens:   []string{"test token"},
+				Platform: 1,
+				Message:  "test message",
+			},
+			nil,
+		},
+		{
+			RequestGaurunNotification{
+				Tokens:   []string{"test token"},
+				Platform: 2,
+				Message:  "test message",
+			},
+			nil,
+		},
+
+		// negative cases
+		{
+			RequestGaurunNotification{
+				Tokens: []string{""},
+			},
+			errors.New("empty token"),
+		},
+		{
+			RequestGaurunNotification{
+				Tokens:   []string{"test token"},
+				Platform: 100, /* neither iOS nor Android */
+			},
+			errors.New("invalid platform"),
+		},
+		{
+			RequestGaurunNotification{
+				Tokens:   []string{"test token"},
+				Platform: 1,
+				Message:  "",
+			},
+			errors.New("empty message"),
+		},
+	}
+
+	for _, c := range cases {
+		actual := validateNotification(&c.Notification)
+		assert.Equal(t, actual, c.Expected)
+	}
+}
+
+func TestSendResponse(t *testing.T) {
+	s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		sendResponse(w, "valid message", http.StatusOK)
+		return
+	}))
+	defer s.Close()
+
+	res, err := http.Get(s.URL)
+	assert.Nil(t, err)
+	assert.Equal(t, res.StatusCode, http.StatusOK)
+
+	body, err := ioutil.ReadAll(res.Body)
+	assert.Nil(t, err)
+	assert.Equal(t, string(body), "{\"message\":\"valid message\"}\n")
+}
+