feat: notification provider (#8)

Co-authored-by: Timo Behrendt <t.behrendt@t00n.de>
Co-committed-by: Timo Behrendt <t.behrendt@t00n.de>

pkg/notificationProvider/gotify/gotify_test.go

@@ -0,0 +1,81 @@
+package notificationProviderGotify_test
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	gotify "realdnydns/pkg/notificationProvider/gotify"
+)
+
+func TestNew(t *testing.T) {
+	t.Run("URL is required", testNewEmptyUrl())
+	t.Run("Token is required", testNewEmptyToken())
+	t.Run("Priority must be between 0 and 4", testNewInvalidPriority())
+	t.Run("Sends POST request to url", testNewSendsPostRequest())
+}
+
+func testNewEmptyUrl() func(t *testing.T) {
+	return func(t *testing.T) {
+		_, err := gotify.New(gotify.NotificationProviderImplGotifyConfig{
+			Token:    "1234",
+			Priority: 1,
+		})
+
+		if err.Error() != "url is required" {
+			t.Errorf("Expected error 'url is required', got %v", err)
+		}
+	}
+}
+
+func testNewEmptyToken() func(t *testing.T) {
+	return func(t *testing.T) {
+		_, err := gotify.New(gotify.NotificationProviderImplGotifyConfig{
+			Url:      "http://localhost:1234",
+			Priority: 0,
+		})
+
+		if err.Error() != "token is required" {
+			t.Errorf("Expected error 'token is required', got %v", err)
+		}
+	}
+}
+
+func testNewInvalidPriority() func(t *testing.T) {
+	return func(t *testing.T) {
+		_, err := gotify.New(gotify.NotificationProviderImplGotifyConfig{
+			Url:      "http://localhost:1234",
+			Token:    "token",
+			Priority: 5,
+		})
+
+		if err.Error() != "priority must be between 0 and 4" {
+			t.Errorf("Expected error 'priority must be between 0 and 4', got %v", err)
+		}
+	}
+}
+
+func testNewSendsPostRequest() func(t *testing.T) {
+	return func(t *testing.T) {
+		mockServer := httptest.NewServer(http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(200)
+			},
+		))
+		defer mockServer.Close()
+
+		provider, err := gotify.New(gotify.NotificationProviderImplGotifyConfig{
+			Url:      mockServer.URL,
+			Token:    "1234",
+			Priority: 0,
+		})
+		if err != nil {
+			t.Fatalf("New() returned unexpected error: %v", err)
+		}
+
+		err = provider.SendNotification("title", "message")
+		if err != nil {
+			t.Fatalf("SendNotification() returned unexpected error: %v", err)
+		}
+	}
+}