Add gRPC API unit test with mock db and redis (#33)

Makefile

@@ -50,6 +50,7 @@ server:
 
 mock:
 	mockgen -package mockdb -destination db/mock/store.go github.com/raphaeldiscky/simple-bank/db/sqlc Store
+	mockgen -package mockwk -destination worker/mock/distributor.go github.com/raphaeldiscky/simple-bank/worker TaskDistributor
 
 proto:
 	rm -f pb/*.go 

gapi/main_test.go

@@ -0,0 +1,23 @@
+package gapi
+
+import (
+	"testing"
+	"time"
+
+	db "github.com/raphaeldiscky/simple-bank/db/sqlc"
+	"github.com/raphaeldiscky/simple-bank/utils"
+	"github.com/raphaeldiscky/simple-bank/worker"
+	"github.com/stretchr/testify/require"
+)
+
+func NewTestServer(t *testing.T, store db.Store, taskDistributor worker.TaskDistributor) *Server {
+	config := utils.Config{
+		TokenSymmetricKey:   utils.RandomString(32),
+		AccessTokenDuration: time.Minute,
+	}
+
+	server, err := NewServer(config, store, taskDistributor)
+	require.NoError(t, err)
+
+	return server
+}

gapi/rpc_create_user_test.go

@@ -0,0 +1,164 @@
+package gapi
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"reflect"
+	"testing"
+
+	mockdb "github.com/raphaeldiscky/simple-bank/db/mock"
+	db "github.com/raphaeldiscky/simple-bank/db/sqlc"
+	"github.com/raphaeldiscky/simple-bank/pb"
+	"github.com/raphaeldiscky/simple-bank/utils"
+	"github.com/raphaeldiscky/simple-bank/worker"
+	mockwk "github.com/raphaeldiscky/simple-bank/worker/mock"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/mock/gomock"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+type eqCreateUserTxParamsMatcher struct {
+	arg      db.CreateUserTxParams
+	password string
+	user     db.User
+}
+
+func (expected eqCreateUserTxParamsMatcher) Matches(x interface{}) bool {
+	actualArg, ok := x.(db.CreateUserTxParams)
+	if !ok {
+		return false
+	}
+
+	err := utils.CheckPassword(expected.password, actualArg.HashedPassword)
+	if err != nil {
+		return false
+	}
+
+	expected.arg.HashedPassword = actualArg.HashedPassword
+	if !reflect.DeepEqual(expected.arg.CreateUserParams, actualArg.CreateUserParams) {
+		return false
+	}
+
+	err = actualArg.AfterCreate(expected.user)
+	return err == nil
+}
+
+func (e eqCreateUserTxParamsMatcher) String() string {
+	return fmt.Sprintf("matches arg %v and password %v", e.arg, e.password)
+}
+
+func EqCreateUserTxParams(arg db.CreateUserTxParams, password string, user db.User) gomock.Matcher {
+	return eqCreateUserTxParamsMatcher{arg, password, user}
+}
+
+func randomUser(t *testing.T) (user db.User, password string) {
+	password = utils.RandomString(6)
+	hashedPassword, err := utils.HashPassword(password)
+	require.NoError(t, err)
+
+	user = db.User{
+		Username:       utils.RandomOwner(),
+		HashedPassword: hashedPassword,
+		FullName:       utils.RandomOwner(),
+		Email:          utils.RandomEmail(),
+	}
+	return
+}
+
+func TestCreateUserAPI(t *testing.T) {
+	user, password := randomUser(t)
+
+	testCases := []struct {
+		name          string
+		req           *pb.CreateUserRequest
+		buildStubs    func(store *mockdb.MockStore, taskDistributor *mockwk.MockTaskDistributor)
+		checkResponse func(t *testing.T, res *pb.CreateUserResponse, err error)
+	}{
+		{
+			name: "OK",
+			req: &pb.CreateUserRequest{
+				Username: user.Username,
+				Password: password,
+				FullName: user.FullName,
+				Email:    user.Email,
+			},
+			buildStubs: func(store *mockdb.MockStore, taskDistributor *mockwk.MockTaskDistributor) {
+				arg := db.CreateUserTxParams{
+					CreateUserParams: db.CreateUserParams{
+						Username: user.Username,
+						FullName: user.FullName,
+						Email:    user.Email,
+					},
+				}
+				store.EXPECT().
+					CreateUserTx(gomock.Any(), EqCreateUserTxParams(arg, password, user)).
+					Times(1).
+					Return(db.CreateUserTxResult{User: user}, nil)
+
+				taskPayload := &worker.PayloadSendVerifyEmail{
+					Username: user.Username,
+				}
+
+				taskDistributor.EXPECT().
+					DistributeTaskSendVerifyEmail(gomock.Any(), taskPayload, gomock.Any()).
+					Times(1).
+					Return(nil)
+			},
+			checkResponse: func(t *testing.T, res *pb.CreateUserResponse, err error) {
+				require.NoError(t, err)
+				require.NotNil(t, res)
+				createdUser := res.GetUser()
+				require.Equal(t, user.Username, createdUser.Username)
+				require.Equal(t, user.FullName, createdUser.FullName)
+				require.Equal(t, user.Email, createdUser.Email)
+			},
+		},
+		{
+			name: "InternalError",
+			req: &pb.CreateUserRequest{
+				Username: user.Username,
+				Password: password,
+				FullName: user.FullName,
+				Email:    user.Email,
+			},
+			buildStubs: func(store *mockdb.MockStore, taskDistributor *mockwk.MockTaskDistributor) {
+				store.EXPECT().
+					CreateUserTx(gomock.Any(), gomock.Any()).
+					Times(1).
+					Return(db.CreateUserTxResult{}, sql.ErrConnDone)
+
+				taskDistributor.EXPECT().
+					DistributeTaskSendVerifyEmail(gomock.Any(), gomock.Any(), gomock.Any()).
+					Times(0)
+			},
+			checkResponse: func(t *testing.T, res *pb.CreateUserResponse, err error) {
+				require.Error(t, err)
+				st, ok := status.FromError(err)
+				require.True(t, ok)
+				require.Equal(t, st.Code(), codes.Internal)
+			},
+		},
+	}
+
+	for i := range testCases {
+		tc := testCases[i]
+
+		t.Run(tc.name, func(t *testing.T) {
+			storeCtrl := gomock.NewController(t)
+			defer storeCtrl.Finish()
+
+			store := mockdb.NewMockStore(storeCtrl)
+
+			taskCtrl := gomock.NewController(t)
+			taskDistributor := mockwk.NewMockTaskDistributor(taskCtrl)
+
+			tc.buildStubs(store, taskDistributor)
+
+			server := NewTestServer(t, store, taskDistributor)
+			res, err := server.CreateUser(context.Background(), tc.req)
+			tc.checkResponse(t, res, err)
+		})
+	}
+}