Add tests for health route

.gitlab-ci.yml

@@ -23,4 +23,4 @@ test:
   stage: test
   needs: []
   script:
-    - go test -v
+    - go test ./... -v

api/health_test.go

@@ -0,0 +1,23 @@
+package api
+
+import (
+	"encoding/json"
+	"github.com/stretchr/testify/assert"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestHealthRoute(t *testing.T) {
+	req, err := http.NewRequest("GET", "/health", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	rec := httptest.NewRecorder()
+	http.HandlerFunc(Health).ServeHTTP(rec, req)
+	res := &Message{}
+	_ = json.NewDecoder(rec.Body).Decode(res)
+
+	assert.Equal(t, http.StatusOK, rec.Code)
+	assert.Equal(t, "I'm alive!", res.Msg)
+}