tests: add tests for health controller

internal/controller/health_controller.go

@@ -19,7 +19,7 @@ func (controller *HealthController) SetupRoutes() {
 
 func (controller *HealthController) healthHandler(c *gin.Context) {
 	c.JSON(200, gin.H{
-		"status":  "ok",
+		"status":  200,
 		"message": "Healthy",
 	})
 }

internal/controller/health_controller_test.go

@@ -0,0 +1,88 @@
+package controller_test
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/steveiliop56/tinyauth/internal/controller"
+)
+
+func TestHealthController(t *testing.T) {
+	tests := []struct {
+		description string
+		path        string
+		method      string
+		expected    string
+	}{
+		{
+			description: "Ensure health endpoint returns 200 OK",
+			path:        "/api/healthz",
+			method:      "GET",
+			expected: func() string {
+				expectedHealthResponse := map[string]any{
+					"status":  200,
+					"message": "Healthy",
+				}
+
+				bytes, err := json.Marshal(expectedHealthResponse)
+
+				if err != nil {
+					t.Fatalf("Failed to marshal expected response: %v", err)
+				}
+
+				return string(bytes)
+			}(),
+		},
+		{
+			description: "Ensure health endpoint returns 200 OK for HEAD request",
+			path:        "/api/healthz",
+			method:      "HEAD",
+			expected: func() string {
+				expectedHealthResponse := map[string]any{
+					"status":  200,
+					"message": "Healthy",
+				}
+
+				bytes, err := json.Marshal(expectedHealthResponse)
+
+				if err != nil {
+					t.Fatalf("Failed to marshal expected response: %v", err)
+				}
+
+				return string(bytes)
+			}(),
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.description, func(t *testing.T) {
+			router := gin.Default()
+			group := router.Group("/api")
+			gin.SetMode(gin.TestMode)
+
+			healthController := controller.NewHealthController(group)
+			healthController.SetupRoutes()
+
+			recorder := httptest.NewRecorder()
+
+			request, err := http.NewRequest(test.method, test.path, nil)
+
+			if err != nil {
+				t.Fatalf("Failed to create request: %v", err)
+			}
+
+			router.ServeHTTP(recorder, request)
+
+			if recorder.Code != http.StatusOK {
+				t.Fatalf("Expected status code 200, got %d", recorder.Code)
+			}
+
+			if recorder.Body.String() != test.expected {
+				t.Fatalf("Expected response body %s, got %s", test.expected, recorder.Body.String())
+			}
+		})
+	}
+}