recipes2/internal/http-server/handlers/recipe/recipe_test.go

package recipe_test

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"net/http/httptest"
	"recipes/internal/domain/models"
	"recipes/internal/http-server/handlers/recipe"
	"recipes/internal/http-server/handlers/recipe/mocks"
	"recipes/internal/lib/logger/handlers/slogdiscard"
	"recipes/internal/storage"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestGetRecipeHandler(t *testing.T) {
	// cases
	cases := []struct {
		name             string        // name of test
		inputJsonPattern string        // input json
		recipe_id        uint          // recipe id to get
		recipe           models.Recipe // recipe data
		wantRespStatus   string        // expected status of response
		wantBody         string        // expected response body
		respError        string        // expected response error
		storageMockError error         // mock error to return
		storageTimes     int           // count of storage calls
	}{
		{
			name:      "Success",
			recipe_id: 1,
			recipe: models.Recipe{
				ID:          1,
				Title:       "title",
				Description: "description",
				Image:       "img.jpg",
				CookingTime: "1 час",
				ServingsNum: 1,
				Calories:    "1 kCal",
				Ingredients: []models.RecipeIngredients{
					{
						Title:       "Ингредиенты",
						Ingredients: []string{"Ингредиент 1", "Ингредиент 2"},
					},
				},
				Recipe_steps: []string{
					"Шаг 1",
					"Шаг 2",
				},
				Advices: []string{
					"1. совет",
					"2. совет",
				},
				Categories: []string{
					"Категория 1",
					"Категория 2",
				},
			},
			wantBody:         "{\"status\":\"OK\",\"recipe\":{\"id\":1,\"title\":\"title\",\"desc\":\"description\",\"img\":\"img.jpg\",\"ctime\":\"1 час\",\"snum\":1,\"cal\":\"1 kCal\",\"ingredients\":[{\"title\":\"Ингредиенты\",\"ingredients\":[\"Ингредиент 1\",\"Ингредиент 2\"]}],\"recipe_steps\":[\"Шаг 1\",\"Шаг 2\"],\"advices\":[\"1. совет\",\"2. совет\"],\"categories\":[\"Категория 1\",\"Категория 2\"]}}\n",
			storageTimes:     1,
			wantRespStatus:   "OK",
			inputJsonPattern: `{"recipe_id": %d}`,
		},
		{
			name:             "Broken JSON",
			respError:        "failed to decode request",
			inputJsonPattern: `{"recipe_id: %d}`,
			wantRespStatus:   "Error",
			wantBody:         "{\"status\":\"Error\",\"error\":\"failed to decode request\"}\n",
			storageTimes:     0,
		},
		{
			name:             "Recipe not exists",
			respError:        "recipe not found",
			inputJsonPattern: `{"recipe_id": %d}`,
			recipe_id:        1,
			wantRespStatus:   "Error",
			storageMockError: storage.ErrRecipeNotFound,
			storageTimes:     1,
			wantBody:         "{\"status\":\"Error\",\"error\":\"recipe not found\"}\n",
		},
		{
			name:             "Storage error",
			respError:        "failed to get recipe",
			inputJsonPattern: `{"recipe_id": %d}`,
			recipe_id:        1,
			wantRespStatus:   "Error",
			storageMockError: errors.New("SOME ERROR"),
			storageTimes:     1,
			wantBody:         "{\"status\":\"Error\",\"error\":\"failed to get recipe\"}\n",
		},
		{
			name:             "Miss recipe_id",
			inputJsonPattern: "{}",
			respError:        "field RecipeId is a required field",
			wantRespStatus:   "Error",
			wantBody:         "{\"status\":\"Error\",\"error\":\"field RecipeId is a required field\"}\n",
			storageTimes:     0,
		},
	}

	for _, tc := range cases {
		tc := tc

		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			// create storage mock
			recipeProviderMock := mocks.NewRecipeProvider(t)
			if tc.storageTimes > 0 {
				recipeProviderMock.On("GetRecipe", context.Background(), tc.recipe_id).Return(tc.recipe, tc.storageMockError).Times(tc.storageTimes)
			}
			// create handler
			handler := recipe.New(slogdiscard.NewDiscardLogger(), recipeProviderMock)
			// create input
			input := fmt.Sprintf(tc.inputJsonPattern, 1)
			// http request
			req, err := http.NewRequest(http.MethodGet, "/recipe", bytes.NewReader([]byte(input)))
			require.NoError(t, err)
			// create request
			rr := httptest.NewRecorder()
			handler.ServeHTTP(rr, req)
			// compare expected and actual
			assert.Equal(t, http.StatusOK, rr.Code)

			body := rr.Body.String()
			assert.Equal(t, tc.wantBody, body)

			var resp recipe.Response
			require.NoError(t, json.Unmarshal([]byte(body), &resp))
			assert.Equal(t, tc.respError, resp.Error)
			assert.Equal(t, tc.wantRespStatus, resp.Status)
			assert.Equal(t, tc.recipe, resp.Recipe)
		})
	}
}