feat: move entity and usecase to root folder

Makefile

@@ -32,9 +32,9 @@ ci: dependencies test
 build-mocks:
 	@go get github.com/golang/mock/gomock
 	@go install github.com/golang/mock/mockgen
-	@~/go/bin/mockgen -source=domain/usecase/book/interface.go -destination=domain/usecase/book/mock/book.go -package=mock
-	@~/go/bin/mockgen -source=domain/usecase/user/interface.go -destination=domain/usecase/user/mock/user.go -package=mock
-	@~/go/bin/mockgen -source=domain/usecase/loan/interface.go -destination=domain/usecase/loan/mock/loan.go -package=mock
+	@~/go/bin/mockgen -source=usecase/book/interface.go -destination=usecase/book/mock/book.go -package=mock
+	@~/go/bin/mockgen -source=usecase/user/interface.go -destination=usecase/user/mock/user.go -package=mock
+	@~/go/bin/mockgen -source=usecase/loan/interface.go -destination=usecase/loan/mock/loan.go -package=mock
 
 test:
 	go test -tags testing ./...

api/handler/book.go

@@ -5,14 +5,12 @@ import (
 	"log"
 	"net/http"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/book"
-
-	"github.com/eminetto/clean-architecture-go-v2/domain"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/book"
 
 	"github.com/eminetto/clean-architecture-go-v2/api/presenter"
 
 	"github.com/codegangsta/negroni"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 	"github.com/gorilla/mux"
 )
 
@@ -29,7 +27,7 @@ func listBooks(service book.UseCase) http.Handler {
 			data, err = service.SearchBooks(title)
 		}
 		w.Header().Set("Content-Type", "application/json")
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return
@@ -108,7 +106,7 @@ func getBook(service book.UseCase) http.Handler {
 			return
 		}
 		data, err := service.GetBook(id)
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return

api/handler/book_test.go

@@ -8,11 +8,10 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 
 	"github.com/codegangsta/negroni"
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/book/mock"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/book/mock"
 	"github.com/golang/mock/gomock"
 	"github.com/gorilla/mux"
 	"github.com/stretchr/testify/assert"
@@ -49,7 +48,7 @@ func Test_listBooks_NotFound(t *testing.T) {
 	defer ts.Close()
 	service.EXPECT().
 		SearchBooks("book of books").
-		Return(nil, domain.ErrNotFound)
+		Return(nil, entity.ErrNotFound)
 	res, err := http.Get(ts.URL + "?title=book+of+books")
 	assert.Nil(t, err)
 	assert.Equal(t, http.StatusNotFound, res.StatusCode)

api/handler/loan.go

@@ -4,15 +4,13 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/book"
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/user"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/book"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/user"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/loan"
-
-	"github.com/eminetto/clean-architecture-go-v2/domain"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/loan"
 
 	"github.com/codegangsta/negroni"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 	"github.com/gorilla/mux"
 )
 
@@ -27,7 +25,7 @@ func borrowBook(bookService book.UseCase, userService user.UseCase, loanService
 			return
 		}
 		b, err := bookService.GetBook(bID)
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return
@@ -44,7 +42,7 @@ func borrowBook(bookService book.UseCase, userService user.UseCase, loanService
 			return
 		}
 		u, err := userService.GetUser(uID)
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return
@@ -76,7 +74,7 @@ func returnBook(bookService book.UseCase, loanService loan.UseCase) http.Handler
 			return
 		}
 		b, err := bookService.GetBook(bID)
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return
@@ -87,7 +85,7 @@ func returnBook(bookService book.UseCase, loanService loan.UseCase) http.Handler
 			return
 		}
 		err = loanService.Return(b)
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return

api/handler/loan_test.go

@@ -6,13 +6,12 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 
 	"github.com/codegangsta/negroni"
-	bmock "github.com/eminetto/clean-architecture-go-v2/domain/usecase/book/mock"
-	lmock "github.com/eminetto/clean-architecture-go-v2/domain/usecase/loan/mock"
-	umock "github.com/eminetto/clean-architecture-go-v2/domain/usecase/user/mock"
+	bmock "github.com/eminetto/clean-architecture-go-v2/usecase/book/mock"
+	lmock "github.com/eminetto/clean-architecture-go-v2/usecase/loan/mock"
+	umock "github.com/eminetto/clean-architecture-go-v2/usecase/user/mock"
 	"github.com/golang/mock/gomock"
 	"github.com/gorilla/mux"
 	"github.com/stretchr/testify/assert"
@@ -35,7 +34,7 @@ func Test_borrowBook(t *testing.T) {
 	t.Run("book not found", func(t *testing.T) {
 		bID := entity.NewID()
 		uID := entity.NewID()
-		bMock.EXPECT().GetBook(bID).Return(nil, domain.ErrNotFound)
+		bMock.EXPECT().GetBook(bID).Return(nil, entity.ErrNotFound)
 		ts := httptest.NewServer(r)
 		defer ts.Close()
 		res, err := http.Get(fmt.Sprintf("%s/v1/loan/borrow/%s/%s", ts.URL, bID.String(), uID.String()))
@@ -48,7 +47,7 @@ func Test_borrowBook(t *testing.T) {
 		}
 		uID := entity.NewID()
 		bMock.EXPECT().GetBook(b.ID).Return(b, nil)
-		uMock.EXPECT().GetUser(uID).Return(nil, domain.ErrNotFound)
+		uMock.EXPECT().GetUser(uID).Return(nil, entity.ErrNotFound)
 		ts := httptest.NewServer(r)
 		defer ts.Close()
 		res, err := http.Get(fmt.Sprintf("%s/v1/loan/borrow/%s/%s", ts.URL, b.ID.String(), uID.String()))
@@ -89,7 +88,7 @@ func Test_returnBook(t *testing.T) {
 	r.Handle("/v1/loan/return/{book_id}", handler)
 	t.Run("book not found", func(t *testing.T) {
 		bID := entity.NewID()
-		bMock.EXPECT().GetBook(bID).Return(nil, domain.ErrNotFound)
+		bMock.EXPECT().GetBook(bID).Return(nil, entity.ErrNotFound)
 		ts := httptest.NewServer(r)
 		defer ts.Close()
 		res, err := http.Get(fmt.Sprintf("%s/v1/loan/return/%s", ts.URL, bID.String()))

api/handler/user.go

@@ -5,13 +5,11 @@ import (
 	"log"
 	"net/http"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/user"
-
-	"github.com/eminetto/clean-architecture-go-v2/domain"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/user"
 
 	"github.com/eminetto/clean-architecture-go-v2/api/presenter"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 
 	"github.com/codegangsta/negroni"
 	"github.com/gorilla/mux"
@@ -30,7 +28,7 @@ func listUsers(service user.UseCase) http.Handler {
 			data, err = service.SearchUsers(name)
 		}
 		w.Header().Set("Content-Type", "application/json")
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return
@@ -108,7 +106,7 @@ func getUser(service user.UseCase) http.Handler {
 		}
 		data, err := service.GetUser(id)
 		w.Header().Set("Content-Type", "application/json")
-		if err != nil && err != domain.ErrNotFound {
+		if err != nil && err != entity.ErrNotFound {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte(errorMessage))
 			return

api/handler/user_test.go

@@ -10,9 +10,8 @@ import (
 
 	"github.com/codegangsta/negroni"
 	"github.com/eminetto/clean-architecture-go-v2/api/presenter"
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/user/mock"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/user/mock"
 	"github.com/golang/mock/gomock"
 	"github.com/gorilla/mux"
 	"github.com/stretchr/testify/assert"
@@ -49,7 +48,7 @@ func Test_listUsers_NotFound(t *testing.T) {
 	defer ts.Close()
 	m.EXPECT().
 		SearchUsers("dio").
-		Return(nil, domain.ErrNotFound)
+		Return(nil, entity.ErrNotFound)
 	res, err := http.Get(ts.URL + "?name=dio")
 	assert.Nil(t, err)
 	assert.Equal(t, http.StatusNotFound, res.StatusCode)

api/main.go

@@ -9,11 +9,11 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/book"
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/user"
 	"github.com/eminetto/clean-architecture-go-v2/infra/repository"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/book"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/user"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/loan"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/loan"
 
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 

api/presenter/book.go

@@ -1,7 +1,7 @@
 package presenter
 
 import (
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //Book data

api/presenter/user.go

@@ -1,7 +1,7 @@
 package presenter
 
 import (
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //User data

cmd/main.go

@@ -7,8 +7,8 @@ import (
 	"log"
 	"os"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/book"
 	"github.com/eminetto/clean-architecture-go-v2/infra/repository"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/book"
 
 	"github.com/eminetto/clean-architecture-go-v2/config"
 	_ "github.com/go-sql-driver/mysql"

entity/book.go

@@ -2,8 +2,6 @@ package entity
 
 import (
 	"time"
-
-	"github.com/eminetto/clean-architecture-go-v2/domain"
 )
 
 //Book data
@@ -29,7 +27,7 @@ func NewBook(title string, author string, pages int, quantity int) (*Book, error
 	}
 	err := b.Validate()
 	if err != nil {
-		return nil, domain.ErrInvalidEntity
+		return nil, ErrInvalidEntity
 	}
 	return b, nil
 }
@@ -37,7 +35,7 @@ func NewBook(title string, author string, pages int, quantity int) (*Book, error
 //Validate validate book
 func (b *Book) Validate() error {
 	if b.Title == "" || b.Author == "" || b.Pages <= 0 || b.Quantity <= 0 {
-		return domain.ErrInvalidEntity
+		return ErrInvalidEntity
 	}
 	return nil
 }

entity/book_test.go

@@ -3,8 +3,7 @@ package entity_test
 import (
 	"testing"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -37,28 +36,28 @@ func TestBookValidate(t *testing.T) {
 			author:   "Neil Gaiman",
 			pages:    100,
 			quantity: 0,
-			want:     domain.ErrInvalidEntity,
+			want:     entity.ErrInvalidEntity,
 		},
 		{
 			title:    "",
 			author:   "Neil Gaiman",
 			pages:    100,
 			quantity: 1,
-			want:     domain.ErrInvalidEntity,
+			want:     entity.ErrInvalidEntity,
 		},
 		{
 			title:    "American Gods",
 			author:   "",
 			pages:    100,
 			quantity: 1,
-			want:     domain.ErrInvalidEntity,
+			want:     entity.ErrInvalidEntity,
 		},
 		{
 			title:    "American Gods",
 			author:   "Neil Gaiman",
 			pages:    0,
 			quantity: 1,
-			want:     domain.ErrInvalidEntity,
+			want:     entity.ErrInvalidEntity,
 		},
 	}
 	for _, tc := range tests {

entity/error.go

@@ -1,4 +1,4 @@
-package domain
+package entity
 
 import "errors"
 

entity/user.go

@@ -3,7 +3,6 @@ package entity
 import (
 	"time"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
 	"golang.org/x/crypto/bcrypt"
 )
 
@@ -35,7 +34,7 @@ func NewUser(email, password, firstName, lastName string) (*User, error) {
 	u.Password = pwd
 	err = u.Validate()
 	if err != nil {
-		return nil, domain.ErrInvalidEntity
+		return nil, ErrInvalidEntity
 	}
 	return u, nil
 }
@@ -44,7 +43,7 @@ func NewUser(email, password, firstName, lastName string) (*User, error) {
 func (u *User) AddBook(id ID) error {
 	_, err := u.GetBook(id)
 	if err == nil {
-		return domain.ErrBookAlreadyBorrowed
+		return ErrBookAlreadyBorrowed
 	}
 	u.Books = append(u.Books, id)
 	return nil
@@ -58,7 +57,7 @@ func (u *User) RemoveBook(id ID) error {
 			return nil
 		}
 	}
-	return domain.ErrNotFound
+	return ErrNotFound
 }
 
 //GetBook get a book
@@ -68,13 +67,13 @@ func (u *User) GetBook(id ID) (ID, error) {
 			return id, nil
 		}
 	}
-	return id, domain.ErrNotFound
+	return id, ErrNotFound
 }
 
 //Validate validate data
 func (u *User) Validate() error {
 	if u.Email == "" || u.FirstName == "" || u.LastName == "" || u.Password == "" {
-		return domain.ErrInvalidEntity
+		return ErrInvalidEntity
 	}
 
 	return nil

entity/user_test.go

@@ -3,8 +3,7 @@ package entity_test
 import (
 	"testing"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -32,14 +31,14 @@ func TestAddBook(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, 1, len(u.Books))
 	err = u.AddBook(bID)
-	assert.Equal(t, domain.ErrBookAlreadyBorrowed, err)
+	assert.Equal(t, entity.ErrBookAlreadyBorrowed, err)
 
 }
 
 func TestRemoveBook(t *testing.T) {
 	u, _ := entity.NewUser("sjobs@apple.com", "new_password", "Steve", "Jobs")
 	err := u.RemoveBook(entity.NewID())
-	assert.Equal(t, domain.ErrNotFound, err)
+	assert.Equal(t, entity.ErrNotFound, err)
 	bID := entity.NewID()
 	_ = u.AddBook(bID)
 	err = u.RemoveBook(bID)
@@ -54,7 +53,7 @@ func TestGetBook(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, id, bID)
 	_, err = u.GetBook(entity.NewID())
-	assert.Equal(t, domain.ErrNotFound, err)
+	assert.Equal(t, entity.ErrNotFound, err)
 }
 
 func TestUserValidate(t *testing.T) {
@@ -79,7 +78,7 @@ func TestUserValidate(t *testing.T) {
 			password:  "new_password",
 			firstName: "Steve",
 			lastName:  "Jobs",
-			want:      domain.ErrInvalidEntity,
+			want:      entity.ErrInvalidEntity,
 		},
 		{
 			email:     "sjobs@apple.com",
@@ -93,14 +92,14 @@ func TestUserValidate(t *testing.T) {
 			password:  "new_password",
 			firstName: "",
 			lastName:  "Jobs",
-			want:      domain.ErrInvalidEntity,
+			want:      entity.ErrInvalidEntity,
 		},
 		{
 			email:     "sjobs@apple.com",
 			password:  "new_password",
 			firstName: "Steve",
 			lastName:  "",
-			want:      domain.ErrInvalidEntity,
+			want:      entity.ErrInvalidEntity,
 		},
 	}
 	for _, tc := range tests {

infra/repository/book_inmem.go

@@ -3,8 +3,7 @@ package repository
 import (
 	"strings"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //BookInmem in memory repo
@@ -29,8 +28,7 @@ func (r *BookInmem) Create(e *entity.Book) (entity.ID, error) {
 //Get a book
 func (r *BookInmem) Get(id entity.ID) (*entity.Book, error) {
 	if r.m[id] == nil {
-		// return nil, fmt.Errorf("not found")
-		return nil, domain.ErrNotFound
+		return nil, entity.ErrNotFound
 	}
 	return r.m[id], nil
 }
@@ -68,8 +66,7 @@ func (r *BookInmem) List() ([]*entity.Book, error) {
 //Delete a book
 func (r *BookInmem) Delete(id entity.ID) error {
 	if r.m[id] == nil {
-		// return fmt.Errorf("not found")
-		return domain.ErrNotFound
+		return entity.ErrNotFound
 	}
 	r.m[id] = nil
 	return nil

infra/repository/book_mysql.go

@@ -4,7 +4,7 @@ import (
 	"database/sql"
 	"time"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //BookMySQL mysql repo

infra/repository/user_inmem.go

@@ -4,8 +4,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //UserInmem in memory repo
@@ -30,8 +29,7 @@ func (r *UserInmem) Create(e *entity.User) (entity.ID, error) {
 //Get an user
 func (r *UserInmem) Get(id entity.ID) (*entity.User, error) {
 	if r.m[id] == nil {
-		// return nil, fmt.Errorf("not found")
-		return nil, domain.ErrNotFound
+		return nil, entity.ErrNotFound
 	}
 	return r.m[id], nil
 }
@@ -55,8 +53,7 @@ func (r *UserInmem) Search(query string) ([]*entity.User, error) {
 		}
 	}
 	if len(d) == 0 {
-		// return nil, fmt.Errorf("not found")
-		return nil, domain.ErrNotFound
+		return nil, entity.ErrNotFound
 	}
 
 	return d, nil

infra/repository/user_mysql.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //UserMySQL mysql repo

usecase/book/interface.go

@@ -1,7 +1,7 @@
 package book
 
 import (
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //Reader interface

usecase/book/mock/book.go

@@ -1,11 +1,11 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: domain/usecase/book/interface.go
+// Source: usecase/book/interface.go
 
 // Package mock is a generated GoMock package.
 package mock
 
 import (
-	entity "github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	entity "github.com/eminetto/clean-architecture-go-v2/entity"
 	gomock "github.com/golang/mock/gomock"
 	reflect "reflect"
 )

usecase/book/service.go

@@ -4,9 +4,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //Service book usecase
@@ -34,7 +32,7 @@ func (s *Service) CreateBook(title string, author string, pages int, quantity in
 func (s *Service) GetBook(id entity.ID) (*entity.Book, error) {
 	b, err := s.repo.Get(id)
 	if b == nil {
-		return nil, domain.ErrNotFound
+		return nil, entity.ErrNotFound
 	}
 	if err != nil {
 		return nil, err
@@ -50,7 +48,7 @@ func (s *Service) SearchBooks(query string) ([]*entity.Book, error) {
 		return nil, err
 	}
 	if len(books) == 0 {
-		return nil, domain.ErrNotFound
+		return nil, entity.ErrNotFound
 	}
 	return books, nil
 }
@@ -62,7 +60,7 @@ func (s *Service) ListBooks() ([]*entity.Book, error) {
 		return nil, err
 	}
 	if len(books) == 0 {
-		return nil, domain.ErrNotFound
+		return nil, entity.ErrNotFound
 	}
 	return books, nil
 }

usecase/book/service_test.go

@@ -4,11 +4,9 @@ import (
 	"testing"
 	"time"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 	"github.com/eminetto/clean-architecture-go-v2/infra/repository"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-
 	"github.com/stretchr/testify/assert"
 )
 
@@ -48,7 +46,7 @@ func Test_SearchAndFind(t *testing.T) {
 		assert.Equal(t, "I Am Ozzy", c[0].Title)
 
 		c, err = m.SearchBooks("dio")
-		assert.Equal(t, domain.ErrNotFound, err)
+		assert.Equal(t, entity.ErrNotFound, err)
 		assert.Nil(t, c)
 	})
 	t.Run("list all", func(t *testing.T) {
@@ -86,10 +84,10 @@ func TestDelete(t *testing.T) {
 	u2ID, _ := m.CreateBook(u2.Title, u2.Author, u2.Pages, u2.Quantity)
 
 	err := m.DeleteBook(u1.ID)
-	assert.Equal(t, domain.ErrNotFound, err)
+	assert.Equal(t, entity.ErrNotFound, err)
 
 	err = m.DeleteBook(u2ID)
 	assert.Nil(t, err)
 	_, err = m.GetBook(u2ID)
-	assert.Equal(t, domain.ErrNotFound, err)
+	assert.Equal(t, entity.ErrNotFound, err)
 }

usecase/loan/interface.go

@@ -1,7 +1,7 @@
 package loan
 
 import (
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //UseCase use case interface

usecase/loan/mock/loan.go

@@ -1,11 +1,11 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: domain/usecase/loan/interface.go
+// Source: usecase/loan/interface.go
 
 // Package mock is a generated GoMock package.
 package mock
 
 import (
-	entity "github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	entity "github.com/eminetto/clean-architecture-go-v2/entity"
 	gomock "github.com/golang/mock/gomock"
 	reflect "reflect"
 )

usecase/loan/service.go

@@ -1,10 +1,9 @@
 package loan
 
 import (
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/book"
-	"github.com/eminetto/clean-architecture-go-v2/domain/usecase/user"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/book"
+	"github.com/eminetto/clean-architecture-go-v2/usecase/user"
 )
 
 //Service loan usecase
@@ -32,7 +31,7 @@ func (s *Service) Borrow(u *entity.User, b *entity.Book) error {
 		return err
 	}
 	if b.Quantity <= 0 {
-		return domain.ErrNotEnoughBooks
+		return entity.ErrNotEnoughBooks
 	}
 
 	err = u.AddBook(b.ID)
@@ -74,7 +73,7 @@ func (s *Service) Return(b *entity.Book) error {
 		break
 	}
 	if !borrowed {
-		return domain.ErrBookNotBorrowed
+		return entity.ErrBookNotBorrowed
 	}
 	u, err := s.userService.GetUser(borrowedBy)
 	if err != nil {

usecase/loan/service_test.go

@@ -3,11 +3,10 @@ package loan
 import (
 	"testing"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	bmock "github.com/eminetto/clean-architecture-go-v2/domain/usecase/book/mock"
-	umock "github.com/eminetto/clean-architecture-go-v2/domain/usecase/user/mock"
+	bmock "github.com/eminetto/clean-architecture-go-v2/usecase/book/mock"
+	umock "github.com/eminetto/clean-architecture-go-v2/usecase/user/mock"
 	"github.com/golang/mock/gomock"
 	"github.com/stretchr/testify/assert"
 )
@@ -25,9 +24,9 @@ func Test_Borrow(t *testing.T) {
 		b := &entity.Book{
 			ID: entity.NewID(),
 		}
-		uMock.EXPECT().GetUser(u.ID).Return(nil, domain.ErrNotFound)
+		uMock.EXPECT().GetUser(u.ID).Return(nil, entity.ErrNotFound)
 		err := uc.Borrow(u, b)
-		assert.Equal(t, domain.ErrNotFound, err)
+		assert.Equal(t, entity.ErrNotFound, err)
 	})
 	t.Run("book not found", func(t *testing.T) {
 		u := &entity.User{
@@ -37,9 +36,9 @@ func Test_Borrow(t *testing.T) {
 			ID: entity.NewID(),
 		}
 		uMock.EXPECT().GetUser(u.ID).Return(u, nil)
-		bMock.EXPECT().GetBook(b.ID).Return(nil, domain.ErrNotFound)
+		bMock.EXPECT().GetBook(b.ID).Return(nil, entity.ErrNotFound)
 		err := uc.Borrow(u, b)
-		assert.Equal(t, domain.ErrNotFound, err)
+		assert.Equal(t, entity.ErrNotFound, err)
 	})
 	t.Run("not enough books to borrow", func(t *testing.T) {
 		u := &entity.User{
@@ -52,7 +51,7 @@ func Test_Borrow(t *testing.T) {
 		uMock.EXPECT().GetUser(u.ID).Return(u, nil)
 		bMock.EXPECT().GetBook(b.ID).Return(b, nil)
 		err := uc.Borrow(u, b)
-		assert.Equal(t, domain.ErrNotEnoughBooks, err)
+		assert.Equal(t, entity.ErrNotEnoughBooks, err)
 	})
 	t.Run("book already borrowed", func(t *testing.T) {
 		u := &entity.User{
@@ -66,7 +65,7 @@ func Test_Borrow(t *testing.T) {
 		uMock.EXPECT().GetUser(u.ID).Return(u, nil)
 		bMock.EXPECT().GetBook(b.ID).Return(b, nil)
 		err := uc.Borrow(u, b)
-		assert.Equal(t, domain.ErrBookAlreadyBorrowed, err)
+		assert.Equal(t, entity.ErrBookAlreadyBorrowed, err)
 	})
 	t.Run("sucess", func(t *testing.T) {
 		u := &entity.User{
@@ -95,9 +94,9 @@ func Test_Return(t *testing.T) {
 		b := &entity.Book{
 			ID: entity.NewID(),
 		}
-		bMock.EXPECT().GetBook(b.ID).Return(nil, domain.ErrNotFound)
+		bMock.EXPECT().GetBook(b.ID).Return(nil, entity.ErrNotFound)
 		err := uc.Return(b)
-		assert.Equal(t, domain.ErrNotFound, err)
+		assert.Equal(t, entity.ErrNotFound, err)
 	})
 	t.Run("book not borrowed", func(t *testing.T) {
 		u := &entity.User{
@@ -109,7 +108,7 @@ func Test_Return(t *testing.T) {
 		bMock.EXPECT().GetBook(b.ID).Return(b, nil)
 		uMock.EXPECT().ListUsers().Return([]*entity.User{u}, nil)
 		err := uc.Return(b)
-		assert.Equal(t, domain.ErrBookNotBorrowed, err)
+		assert.Equal(t, entity.ErrBookNotBorrowed, err)
 	})
 	t.Run("success", func(t *testing.T) {
 		u := &entity.User{

usecase/user/interface.go

@@ -1,7 +1,7 @@
 package user
 
 import (
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //Reader interface

usecase/user/mock/user.go

@@ -1,11 +1,11 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: domain/usecase/user/interface.go
+// Source: usecase/user/interface.go
 
 // Package mock is a generated GoMock package.
 package mock
 
 import (
-	entity "github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	entity "github.com/eminetto/clean-architecture-go-v2/entity"
 	gomock "github.com/golang/mock/gomock"
 	reflect "reflect"
 )

usecase/user/service.go

@@ -4,9 +4,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 )
 
 //Service  interface
@@ -49,13 +47,13 @@ func (s *Service) ListUsers() ([]*entity.User, error) {
 func (s *Service) DeleteUser(id entity.ID) error {
 	u, err := s.GetUser(id)
 	if u == nil {
-		return domain.ErrNotFound
+		return entity.ErrNotFound
 	}
 	if err != nil {
 		return err
 	}
 	if len(u.Books) > 0 {
-		return domain.ErrCannotBeDeleted
+		return entity.ErrCannotBeDeleted
 	}
 	return s.repo.Delete(id)
 }
@@ -64,7 +62,7 @@ func (s *Service) DeleteUser(id entity.ID) error {
 func (s *Service) UpdateUser(e *entity.User) error {
 	err := e.Validate()
 	if err != nil {
-		return domain.ErrInvalidEntity
+		return entity.ErrInvalidEntity
 	}
 	e.UpdatedAt = time.Now()
 	return s.repo.Update(e)

usecase/user/service_test.go

@@ -6,8 +6,7 @@ import (
 
 	"github.com/eminetto/clean-architecture-go-v2/infra/repository"
 
-	"github.com/eminetto/clean-architecture-go-v2/domain"
-	"github.com/eminetto/clean-architecture-go-v2/domain/entity"
+	"github.com/eminetto/clean-architecture-go-v2/entity"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -50,7 +49,7 @@ func Test_SearchAndFind(t *testing.T) {
 		assert.Equal(t, "Osbourne", c[0].LastName)
 
 		c, err = m.SearchUsers("dio")
-		assert.Equal(t, domain.ErrNotFound, err)
+		assert.Equal(t, entity.ErrNotFound, err)
 		assert.Nil(t, c)
 	})
 	t.Run("list all", func(t *testing.T) {
@@ -91,12 +90,12 @@ func TestDelete(t *testing.T) {
 	u2ID, _ := m.CreateUser(u2.Email, u2.Password, u2.FirstName, u2.LastName)
 
 	err := m.DeleteUser(u1.ID)
-	assert.Equal(t, domain.ErrNotFound, err)
+	assert.Equal(t, entity.ErrNotFound, err)
 
 	err = m.DeleteUser(u2ID)
 	assert.Nil(t, err)
 	_, err = m.GetUser(u2ID)
-	assert.Equal(t, domain.ErrNotFound, err)
+	assert.Equal(t, entity.ErrNotFound, err)
 
 	u3 := newFixtureUser()
 	id, _ := m.CreateUser(u3.Email, u3.Password, u3.FirstName, u3.LastName)
@@ -104,5 +103,5 @@ func TestDelete(t *testing.T) {
 	saved.Books = []entity.ID{entity.NewID()}
 	_ = m.UpdateUser(saved)
 	err = m.DeleteUser(id)
-	assert.Equal(t, domain.ErrCannotBeDeleted, err)
+	assert.Equal(t, entity.ErrCannotBeDeleted, err)
 }