test(issue-2): added cases for liveness endpoint

rest/health_test.go

@@ -93,3 +93,79 @@ func TestReadinessEndpoint(t *testing.T) {
 		})
 	})
 }
+
+func TestLivenessEndpoint(t *testing.T) {
+	t.Run("will return http 200 status code", func(t *testing.T) {
+		t.Run("if the health metric is healthy", func(t *testing.T) {
+			var m health.Binary
+			if !assert.True(t, m.Healthy(context.Background())) {
+				return
+			}
+
+			e := livenessEndpoint(&m)
+
+			w := httptest.NewRecorder()
+			r := httptest.NewRequest(http.MethodGet, "/health/liveness", nil)
+
+			e.ServeHTTP(w, r)
+
+			resp := w.Result()
+			if !assert.Equal(t, http.StatusOK, resp.StatusCode) {
+				return
+			}
+
+			b, err := io.ReadAll(resp.Body)
+			if !assert.Nil(t, err) {
+				return
+			}
+			if !assert.Empty(t, b) {
+				return
+			}
+		})
+	})
+
+	t.Run("will return http 503 status code", func(t *testing.T) {
+		t.Run("if the health metric is unhealthy", func(t *testing.T) {
+			var m health.Binary
+			m.Toggle()
+			if !assert.False(t, m.Healthy(context.Background())) {
+				return
+			}
+
+			e := livenessEndpoint(&m)
+
+			w := httptest.NewRecorder()
+			r := httptest.NewRequest(http.MethodGet, "/health/liveness", nil)
+
+			e.ServeHTTP(w, r)
+
+			resp := w.Result()
+			if !assert.Equal(t, http.StatusServiceUnavailable, resp.StatusCode) {
+				return
+			}
+			if !assert.Equal(t, "application/x-protobuf", resp.Header.Get("Content-Type")) {
+				return
+			}
+
+			b, err := io.ReadAll(resp.Body)
+			if !assert.Nil(t, err) {
+				return
+			}
+
+			var status humuspb.Status
+			err = proto.Unmarshal(b, &status)
+			if !assert.Nil(t, err) {
+				return
+			}
+			if !assert.Equal(t, humuspb.Code_UNAVAILABLE, status.Code) {
+				return
+			}
+			if !assert.NotEmpty(t, status.Message) {
+				return
+			}
+			if !assert.Empty(t, status.Details) {
+				return
+			}
+		})
+	})
+}