added repository test

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/go-playground/validator v9.31.0+incompatible
 	github.com/joho/godotenv v1.5.1
 	github.com/spf13/viper v1.19.0
+	github.com/stretchr/testify v1.9.0
 	github.com/swaggo/files v1.0.1
 	github.com/swaggo/gin-swagger v1.6.0
 	github.com/swaggo/swag v1.16.3
@@ -18,6 +19,7 @@ require (
 	github.com/KyleBanks/depth v1.2.1 // indirect
 	github.com/bytedance/sonic v1.9.1 // indirect
 	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
@@ -46,12 +48,14 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/sagikazarmark/locafero v0.4.0 // indirect
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/sourcegraph/conc v0.3.0 // indirect
 	github.com/spf13/afero v1.11.0 // indirect
 	github.com/spf13/cast v1.6.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.11 // indirect

go.sum

@@ -152,6 +152,7 @@ github.com/spf13/viper v1.19.0/go.mod h1:GQUN9bilAbhU/jgc1bKs99f/suXKeUMct8Adx5+
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
 github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=

internal/core/interfaces/database.go

@@ -0,0 +1,7 @@
+package interfaces
+
+import "gorm.io/gorm"
+
+type Database interface {
+	Find(dest interface{}, conds ...interface{}) *gorm.DB
+}

internal/infra/repositories/book_repository.go

@@ -2,16 +2,16 @@ package repositories
 
 import (
 	"github.com/VikashChauhan51/go-sample-api/internal/core/entities"
-	interfaces "github.com/VikashChauhan51/go-sample-api/internal/core/interfaces/repositories"
+	interfaces "github.com/VikashChauhan51/go-sample-api/internal/core/interfaces"
+	repo "github.com/VikashChauhan51/go-sample-api/internal/core/interfaces/repositories"
 	_ "gorm.io/driver/sqlserver"
-	"gorm.io/gorm"
 )
 
 type BookRepository struct {
-	db *gorm.DB
+	db interfaces.Database
 }
 
-func NewBookRepository(db *gorm.DB) interfaces.BookRepository {
+func NewBookRepository(db interfaces.Database) repo.BookRepository {
 	return &BookRepository{db}
 }
 

test/mocks/db.go

@@ -0,0 +1,15 @@
+package mocks
+
+import (
+	"github.com/stretchr/testify/mock"
+	"gorm.io/gorm"
+)
+
+type MockDB struct {
+	mock.Mock
+}
+
+func (m *MockDB) Find(out interface{}, where ...interface{}) *gorm.DB {
+	args := m.Called(out, where)
+	return args.Get(0).(*gorm.DB)
+}

test/repositories/book_repository_test.go

@@ -0,0 +1,36 @@
+package repositories
+
+import (
+	"testing"
+
+	"github.com/VikashChauhan51/go-sample-api/internal/core/entities"
+	repo "github.com/VikashChauhan51/go-sample-api/internal/infra/repositories"
+	"github.com/VikashChauhan51/go-sample-api/test/mocks"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+	"gorm.io/gorm"
+)
+
+func TestFetchBooksAsync(t *testing.T) {
+	mockDB := new(mocks.MockDB)
+	repo := repo.NewBookRepository(mockDB)
+
+	expectedBooks := []entities.Book{
+		{ID: 1, Title: "Title1", Author: "Author1"},
+		{ID: 2, Title: "Title2", Author: "Author2"},
+	}
+
+	mockDB.On("Find", mock.Anything, mock.Anything).Run(func(args mock.Arguments) {
+		arg := args.Get(0).(*[]entities.Book)
+		*arg = expectedBooks
+	}).Return(&gorm.DB{Error: nil}).Once()
+
+	result, err := repo.FetchBooksAsync()
+
+	assert.NoError(t, err)
+	assert.NotNil(t, result)
+	assert.Equal(t, len(expectedBooks), len(*result))
+
+	mockDB.AssertExpectations(t)
+}