Add code from PR amitshekhariitbhu#12 - Add test for task controller

Author: Yuri-SN

api/controller/task_controller_test.go

@@ -0,0 +1,182 @@
+package controller_test
+
+import (
+	"encoding/json"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"testing"
+
+	"github.com/amitshekhariitbhu/go-backend-clean-architecture/api/controller"
+	"github.com/amitshekhariitbhu/go-backend-clean-architecture/domain"
+	"github.com/amitshekhariitbhu/go-backend-clean-architecture/domain/mocks"
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+func TestCreateTask(t *testing.T) {
+	t.Run("success", func(t *testing.T) {
+		userObjectID := primitive.NewObjectID()
+		userID := userObjectID.Hex()
+
+		mockTaskUsecase := new(mocks.TaskUsecase)
+
+		mockTaskUsecase.On("Create", mock.Anything, mock.Anything).Return(nil)
+
+		gin := gin.Default()
+
+		rec := httptest.NewRecorder()
+
+		tc := &controller.TaskController{
+			TaskUsecase: mockTaskUsecase,
+		}
+
+		gin.Use(setUserID(userID))
+		gin.POST("/task", tc.Create)
+
+		body, err := json.Marshal(domain.SuccessResponse{Message: "Task created successfully"})
+		assert.NoError(t, err)
+
+		bodyString := string(body)
+
+		data := url.Values{}
+		data.Set("title", "Test Task")
+		req := httptest.NewRequest(http.MethodPost, "/task", strings.NewReader(data.Encode()))
+		req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+		gin.ServeHTTP(rec, req)
+
+		assert.Equal(t, http.StatusOK, rec.Code)
+
+		assert.Equal(t, bodyString, rec.Body.String())
+
+		mockTaskUsecase.AssertExpectations(t)
+	})
+
+	t.Run("error", func(t *testing.T) {
+		userObjectID := primitive.NewObjectID()
+		userID := userObjectID.Hex()
+
+		mockTaskUsecase := new(mocks.TaskUsecase)
+
+		customErr := errors.New("Unexpected")
+
+		mockTaskUsecase.On("Create", mock.Anything, mock.Anything).Return(customErr)
+
+		gin := gin.Default()
+
+		rec := httptest.NewRecorder()
+
+		tc := &controller.TaskController{
+			TaskUsecase: mockTaskUsecase,
+		}
+
+		gin.Use(setUserID(userID))
+		gin.POST("/task", tc.Create)
+
+		body, err := json.Marshal(domain.ErrorResponse{Message: customErr.Error()})
+		assert.NoError(t, err)
+
+		bodyString := string(body)
+
+		data := url.Values{}
+		data.Set("title", "Test Task")
+		req := httptest.NewRequest(http.MethodPost, "/task", strings.NewReader(data.Encode()))
+		req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
+		gin.ServeHTTP(rec, req)
+
+		assert.Equal(t, http.StatusInternalServerError, rec.Code)
+
+		assert.Equal(t, bodyString, rec.Body.String())
+
+		mockTaskUsecase.AssertExpectations(t)
+	})
+}
+
+func TestFetchTask(t *testing.T) {
+	t.Run("success", func(t *testing.T) {
+		userObjectID := primitive.NewObjectID()
+		userID := userObjectID.Hex()
+
+		mockTasks := []domain.Task{
+			{
+				ID:     primitive.NewObjectID(),
+				Title:  "Test Task",
+				UserID: userObjectID,
+			},
+			{
+				ID:     primitive.NewObjectID(),
+				Title:  "Test Task2",
+				UserID: userObjectID,
+			},
+		}
+
+		mockTaskUsecase := new(mocks.TaskUsecase)
+
+		mockTaskUsecase.On("FetchByUserID", mock.Anything, userID).Return(mockTasks, nil)
+
+		gin := gin.Default()
+
+		rec := httptest.NewRecorder()
+
+		tc := &controller.TaskController{
+			TaskUsecase: mockTaskUsecase,
+		}
+
+		gin.Use(setUserID(userID))
+		gin.GET("/task", tc.Fetch)
+
+		body, err := json.Marshal(mockTasks)
+		assert.NoError(t, err)
+
+		bodyString := string(body)
+
+		req := httptest.NewRequest(http.MethodGet, "/task", nil)
+		gin.ServeHTTP(rec, req)
+
+		assert.Equal(t, http.StatusOK, rec.Code)
+
+		assert.Equal(t, bodyString, rec.Body.String())
+
+		mockTaskUsecase.AssertExpectations(t)
+	})
+
+	t.Run("error", func(t *testing.T) {
+		userObjectID := primitive.NewObjectID()
+		userID := userObjectID.Hex()
+
+		mockTaskUsecase := new(mocks.TaskUsecase)
+
+		customErr := errors.New("Unexpected")
+
+		mockTaskUsecase.On("FetchByUserID", mock.Anything, userID).Return(nil, customErr)
+
+		gin := gin.Default()
+
+		rec := httptest.NewRecorder()
+
+		tc := &controller.TaskController{
+			TaskUsecase: mockTaskUsecase,
+		}
+
+		gin.Use(setUserID(userID))
+		gin.GET("/task", tc.Fetch)
+
+		body, err := json.Marshal(domain.ErrorResponse{Message: customErr.Error()})
+		assert.NoError(t, err)
+
+		bodyString := string(body)
+
+		req := httptest.NewRequest(http.MethodGet, "/task", nil)
+		gin.ServeHTTP(rec, req)
+
+		assert.Equal(t, http.StatusInternalServerError, rec.Code)
+
+		assert.Equal(t, bodyString, rec.Body.String())
+
+		mockTaskUsecase.AssertExpectations(t)
+	})
+}