add configuration module

src/app.controller.spec.ts

@@ -1,22 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
-
-describe('AppController', () => {
-  let appController: AppController;
-
-  beforeEach(async () => {
-    const app: TestingModule = await Test.createTestingModule({
-      controllers: [AppController],
-      providers: [AppService],
-    }).compile();
-
-    appController = app.get<AppController>(AppController);
-  });
-
-  describe('root', () => {
-    it('should return "Hello World!"', () => {
-      expect(appController.getHello()).toBe('Hello World!');
-    });
-  });
-});

src/app.controller.ts

@@ -1,12 +0,0 @@
-import { Controller, Get } from '@nestjs/common';
-import { AppService } from './app.service';
-
-@Controller()
-export class AppController {
-  constructor(private readonly appService: AppService) {}
-
-  @Get()
-  getHello(): string {
-    return this.appService.getHello();
-  }
-}

src/app.module.ts

@@ -1,10 +1,16 @@
+import { classes } from '@automapper/classes';
+import { AutomapperModule } from '@automapper/nestjs';
 import { Module } from '@nestjs/common';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
+import { ConfigModule } from '@nestjs/config';
+import { ConfigurationModule } from './modules/configuration/configuration.module';
 
 @Module({
-  imports: [],
-  controllers: [AppController],
-  providers: [AppService],
+  imports: [
+    ConfigModule.forRoot({ isGlobal: true }),
+    AutomapperModule.forRoot({ strategyInitializer: classes() }),
+    ConfigurationModule,
+  ],
+  controllers: [],
+  providers: [],
 })
 export class AppModule {}

src/app.service.ts

@@ -1,8 +0,0 @@
-import { Injectable } from '@nestjs/common';
-
-@Injectable()
-export class AppService {
-  getHello(): string {
-    return 'Hello World!';
-  }
-}

src/main.ts

@@ -1,8 +1,24 @@
 import { NestFactory } from '@nestjs/core';
+import { MicroserviceOptions, Transport } from '@nestjs/microservices';
+import { join } from 'path';
 import { AppModule } from './app.module';
 
 async function bootstrap() {
-  const app = await NestFactory.create(AppModule);
-  await app.listen(3000);
+  const app = await NestFactory.createMicroservice<MicroserviceOptions>(
+    AppModule,
+    {
+      transport: Transport.GRPC,
+      options: {
+        package: 'configuration',
+        protoPath: join(
+          __dirname,
+          'modules/configuration/adapters/primaries/configuration.proto',
+        ),
+        url: process.env.SERVICE_URL + ':' + process.env.SERVICE_PORT,
+        loader: { keepCase: true },
+      },
+    },
+  );
+  await app.listen();
 }
 bootstrap();

src/modules/configuration/adapters/primaries/configuration.controller.ts

@@ -0,0 +1,144 @@
+import { Mapper } from '@automapper/core';
+import { InjectMapper } from '@automapper/nestjs';
+import { Controller, UsePipes } from '@nestjs/common';
+import { CommandBus, QueryBus } from '@nestjs/cqrs';
+import { GrpcMethod, RpcException } from '@nestjs/microservices';
+import { DatabaseException } from 'src/modules/database/src/exceptions/database.exception';
+import { ICollection } from 'src/modules/database/src/interfaces/collection.interface';
+import { RpcValidationPipe } from 'src/utils/pipes/rpc.validation-pipe';
+import { CreateConfigurationCommand } from '../../commands/create-configuration.command';
+import { DeleteConfigurationCommand } from '../../commands/delete-configuration.command';
+import { UpdateConfigurationCommand } from '../../commands/update-configuration.command';
+import { CreateConfigurationRequest } from '../../domain/dtos/create-configuration.request';
+import { FindAllConfigurationsRequest } from '../../domain/dtos/find-all-configurations.request';
+import { FindConfigurationByUuidRequest } from '../../domain/dtos/find-configuration-by-uuid.request';
+import { UpdateConfigurationRequest } from '../../domain/dtos/update-configuration.request';
+import { Configuration } from '../../domain/entities/configuration';
+import { FindAllConfigurationsQuery } from '../../queries/find-all-configurations.query';
+import { FindConfigurationByUuidQuery } from '../../queries/find-configuration-by-uuid.query';
+import { ConfigurationPresenter } from './configuration.presenter';
+
+@UsePipes(
+  new RpcValidationPipe({
+    whitelist: true,
+    forbidUnknownValues: false,
+  }),
+)
+@Controller()
+export class ConfigurationController {
+  constructor(
+    private readonly _commandBus: CommandBus,
+    private readonly _queryBus: QueryBus,
+    @InjectMapper() private readonly _mapper: Mapper,
+  ) {}
+
+  @GrpcMethod('ConfigurationService', 'FindAll')
+  async findAll(
+    data: FindAllConfigurationsRequest,
+  ): Promise<ICollection<Configuration>> {
+    const configurationCollection = await this._queryBus.execute(
+      new FindAllConfigurationsQuery(data),
+    );
+    return Promise.resolve({
+      data: configurationCollection.data.map((configuration: Configuration) =>
+        this._mapper.map(configuration, Configuration, ConfigurationPresenter),
+      ),
+      total: configurationCollection.total,
+    });
+  }
+
+  @GrpcMethod('ConfigurationService', 'FindOneByUuid')
+  async findOneByUuid(
+    data: FindConfigurationByUuidRequest,
+  ): Promise<ConfigurationPresenter> {
+    try {
+      const configuration = await this._queryBus.execute(
+        new FindConfigurationByUuidQuery(data),
+      );
+      return this._mapper.map(
+        configuration,
+        Configuration,
+        ConfigurationPresenter,
+      );
+    } catch (error) {
+      throw new RpcException({
+        code: 5,
+        message: 'Configuration not found',
+      });
+    }
+  }
+
+  @GrpcMethod('ConfigurationService', 'Create')
+  async createConfiguration(
+    data: CreateConfigurationRequest,
+  ): Promise<ConfigurationPresenter> {
+    try {
+      const configuration = await this._commandBus.execute(
+        new CreateConfigurationCommand(data),
+      );
+      return this._mapper.map(
+        configuration,
+        Configuration,
+        ConfigurationPresenter,
+      );
+    } catch (e) {
+      if (e instanceof DatabaseException) {
+        if (e.message.includes('Already exists')) {
+          throw new RpcException({
+            code: 6,
+            message: 'Configuration already exists',
+          });
+        }
+      }
+      throw new RpcException({});
+    }
+  }
+
+  @GrpcMethod('ConfigurationService', 'Update')
+  async updateConfiguration(
+    data: UpdateConfigurationRequest,
+  ): Promise<ConfigurationPresenter> {
+    try {
+      const configuration = await this._commandBus.execute(
+        new UpdateConfigurationCommand(data),
+      );
+
+      return this._mapper.map(
+        configuration,
+        Configuration,
+        ConfigurationPresenter,
+      );
+    } catch (e) {
+      if (e instanceof DatabaseException) {
+        if (e.message.includes('not found')) {
+          throw new RpcException({
+            code: 5,
+            message: 'Configuration not found',
+          });
+        }
+      }
+      throw new RpcException({});
+    }
+  }
+
+  @GrpcMethod('ConfigurationService', 'Delete')
+  async deleteConfiguration(
+    data: FindConfigurationByUuidRequest,
+  ): Promise<void> {
+    try {
+      await this._commandBus.execute(new DeleteConfigurationCommand(data.uuid));
+
+      return Promise.resolve();
+    } catch (e) {
+      if (e instanceof DatabaseException) {
+        if (e.message.includes('not found')) {
+          throw new RpcException({
+            code: 5,
+            message: 'Configuration not found',
+          });
+        }
+      }
+      throw new RpcException({});
+    }
+  }
+}

src/modules/configuration/adapters/primaries/configuration.presenter.ts

@@ -0,0 +1,6 @@
+import { AutoMap } from '@automapper/classes';
+
+export class ConfigurationPresenter {
+  @AutoMap()
+  value: string;
+}

src/modules/configuration/adapters/primaries/configuration.proto

@@ -0,0 +1,38 @@
+syntax = "proto3";
+
+package configuration;
+
+service ConfigurationService {
+  rpc FindOneByUuid(ConfigurationByUuid) returns (Configuration);
+  rpc FindAll(ConfigurationFilter) returns (Configurations);
+  rpc Create(Configuration) returns (Configuration);
+  rpc Update(Configuration) returns (Configuration);
+  rpc Delete(ConfigurationByUuid) returns (Empty);
+}
+
+message ConfigurationByUuid {
+  string uuid = 1;
+}
+
+message Configuration {
+  string uuid = 1;
+  Domain domain = 2;
+  string key = 3;
+  string value = 4;
+}
+
+enum Domain {
+  user = 0;
+}
+
+message ConfigurationFilter {
+  optional int32 page = 1;
+  optional int32 perPage = 2;
+}
+
+message Configurations {
+  repeated Configuration data = 1;
+  int32 total = 2;
+}
+
+message Empty {}

src/modules/configuration/adapters/secondaries/configuration.repository.ts

@@ -0,0 +1,8 @@
+import { Injectable } from '@nestjs/common';
+import { ConfigRepository } from '../../../database/src/domain/configuration.repository';
+import { Configuration } from '../../domain/entities/configuration';
+
+@Injectable()
+export class ConfigurationRepository extends ConfigRepository<Configuration> {
+  protected _model = 'configuration';
+}

src/modules/configuration/commands/create-configuration.command.ts

@@ -0,0 +1,9 @@
+import { CreateConfigurationRequest } from '../domain/dtos/create-configuration.request';
+
+export class CreateConfigurationCommand {
+  readonly createConfigurationRequest: CreateConfigurationRequest;
+
+  constructor(request: CreateConfigurationRequest) {
+    this.createConfigurationRequest = request;
+  }
+}

src/modules/configuration/commands/delete-configuration.command.ts

@@ -0,0 +1,7 @@
+export class DeleteConfigurationCommand {
+  readonly uuid: string;
+
+  constructor(uuid: string) {
+    this.uuid = uuid;
+  }
+}

src/modules/configuration/commands/update-configuration.command.ts

@@ -0,0 +1,9 @@
+import { UpdateConfigurationRequest } from '../domain/dtos/update-configuration.request';
+
+export class UpdateConfigurationCommand {
+  readonly updateConfigurationRequest: UpdateConfigurationRequest;
+
+  constructor(request: UpdateConfigurationRequest) {
+    this.updateConfigurationRequest = request;
+  }
+}

src/modules/configuration/configuration.module.ts

@@ -0,0 +1,14 @@
+import { Module } from '@nestjs/common';
+import { CqrsModule } from '@nestjs/cqrs';
+import { DatabaseModule } from '../database/database.module';
+import { ConfigRepository } from '../database/src/domain/configuration.repository';
+import { ConfigurationController } from './adapters/primaries/configuration.controller';
+import { ConfigurationProfile } from './mappers/configuration.profile';
+
+@Module({
+  imports: [DatabaseModule, CqrsModule],
+  exports: [],
+  controllers: [ConfigurationController],
+  providers: [ConfigurationProfile, ConfigRepository],
+})
+export class ConfigurationModule {}

src/modules/configuration/domain/dtos/create-configuration.request.ts

@@ -0,0 +1,25 @@
+import { AutoMap } from '@automapper/classes';
+import { IsEmail, IsNotEmpty, IsOptional, IsString } from 'class-validator';
+import { Domain } from './domain.enum';
+
+export class CreateConfigurationRequest {
+  @IsString()
+  @IsOptional()
+  @AutoMap()
+  uuid?: string;
+
+  @IsString()
+  @IsNotEmpty()
+  @AutoMap()
+  domain: Domain;
+
+  @IsString()
+  @IsNotEmpty()
+  @AutoMap()
+  key: string;
+
+  @IsEmail()
+  @IsNotEmpty()
+  @AutoMap()
+  value: string;
+}

src/modules/configuration/domain/dtos/domain.enum.ts

@@ -0,0 +1,3 @@
+export enum Domain {
+  user = 'user',
+}

src/modules/configuration/domain/dtos/find-all-configurations.request.ts

@@ -0,0 +1,11 @@
+import { IsInt, IsOptional } from 'class-validator';
+
+export class FindAllConfigurationsRequest {
+  @IsInt()
+  @IsOptional()
+  page?: number;
+
+  @IsInt()
+  @IsOptional()
+  perPage?: number;
+}

src/modules/configuration/domain/dtos/find-configuration-by-uuid.request.ts

@@ -0,0 +1,7 @@
+import { IsNotEmpty, IsString } from 'class-validator';
+
+export class FindConfigurationByUuidRequest {
+  @IsString()
+  @IsNotEmpty()
+  uuid: string;
+}

src/modules/configuration/domain/dtos/update-configuration.request.ts

@@ -0,0 +1,25 @@
+import { AutoMap } from '@automapper/classes';
+import { IsNotEmpty, IsOptional, IsString } from 'class-validator';
+import { Domain } from './domain.enum';
+
+export class UpdateConfigurationRequest {
+  @IsString()
+  @IsNotEmpty()
+  @AutoMap()
+  uuid: string;
+
+  @IsString()
+  @IsOptional()
+  @AutoMap()
+  domain?: Domain;
+
+  @IsString()
+  @IsOptional()
+  @AutoMap()
+  key?: string;
+
+  @IsString()
+  @IsOptional()
+  @AutoMap()
+  value?: string;
+}

src/modules/configuration/domain/entities/configuration.ts

@@ -0,0 +1,16 @@
+import { AutoMap } from '@automapper/classes';
+import { Domain } from '../dtos/domain.enum';
+
+export class Configuration {
+  @AutoMap()
+  uuid: string;
+
+  @AutoMap()
+  domain: Domain;
+
+  @AutoMap()
+  key: string;
+
+  @AutoMap()
+  value: string;
+}

src/modules/configuration/domain/usecases/create-configuration.usecase.ts

@@ -0,0 +1,30 @@
+import { Mapper } from '@automapper/core';
+import { InjectMapper } from '@automapper/nestjs';
+import { CommandHandler } from '@nestjs/cqrs';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { CreateConfigurationCommand } from '../../commands/create-configuration.command';
+import { CreateConfigurationRequest } from '../dtos/create-configuration.request';
+import { Configuration } from '../entities/configuration';
+
+@CommandHandler(CreateConfigurationCommand)
+export class CreateConfigurationUseCase {
+  constructor(
+    private readonly _repository: ConfigurationRepository,
+    @InjectMapper() private readonly _mapper: Mapper,
+  ) {}
+
+  async execute(command: CreateConfigurationCommand): Promise<Configuration> {
+    const entity = this._mapper.map(
+      command.createConfigurationRequest,
+      CreateConfigurationRequest,
+      Configuration,
+    );
+
+    try {
+      const configuration = await this._repository.create(entity);
+      return configuration;
+    } catch (error) {
+      throw error;
+    }
+  }
+}

src/modules/configuration/domain/usecases/delete-configuration.usecase.ts

@@ -0,0 +1,18 @@
+import { CommandHandler } from '@nestjs/cqrs';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { DeleteConfigurationCommand } from '../../commands/delete-configuration.command';
+import { Configuration } from '../entities/configuration';
+
+@CommandHandler(DeleteConfigurationCommand)
+export class DeleteConfigurationUseCase {
+  constructor(private readonly _repository: ConfigurationRepository) {}
+
+  async execute(command: DeleteConfigurationCommand): Promise<Configuration> {
+    try {
+      const configuration = await this._repository.delete(command.uuid);
+      return configuration;
+    } catch (error) {
+      throw error;
+    }
+  }
+}

src/modules/configuration/domain/usecases/find-all-configurations.usecase.ts

@@ -0,0 +1,19 @@
+import { QueryHandler } from '@nestjs/cqrs';
+import { ICollection } from 'src/modules/database/src/interfaces/collection.interface';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { FindAllConfigurationsQuery } from '../../queries/find-all-configurations.query';
+import { Configuration } from '../entities/configuration';
+
+@QueryHandler(FindAllConfigurationsQuery)
+export class FindAllConfigurationsUseCase {
+  constructor(private readonly _repository: ConfigurationRepository) {}
+
+  async execute(
+    findAllConfigurationsQuery: FindAllConfigurationsQuery,
+  ): Promise<ICollection<Configuration>> {
+    return this._repository.findAll(
+      findAllConfigurationsQuery.page,
+      findAllConfigurationsQuery.perPage,
+    );
+  }
+}

src/modules/configuration/domain/usecases/find-configuration-by-uuid.usecase.ts

@@ -0,0 +1,24 @@
+import { NotFoundException } from '@nestjs/common';
+import { QueryHandler } from '@nestjs/cqrs';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { FindConfigurationByUuidQuery } from '../../queries/find-configuration-by-uuid.query';
+import { Configuration } from '../entities/configuration';
+
+@QueryHandler(FindConfigurationByUuidQuery)
+export class FindConfigurationByUuidUseCase {
+  constructor(private readonly _repository: ConfigurationRepository) {}
+
+  async execute(
+    findConfigurationByUuid: FindConfigurationByUuidQuery,
+  ): Promise<Configuration> {
+    try {
+      const configuration = await this._repository.findOneByUuid(
+        findConfigurationByUuid.uuid,
+      );
+      if (!configuration) throw new NotFoundException();
+      return configuration;
+    } catch (error) {
+      throw error;
+    }
+  }
+}

src/modules/configuration/domain/usecases/update-configuration.usecase.ts

@@ -0,0 +1,33 @@
+import { Mapper } from '@automapper/core';
+import { InjectMapper } from '@automapper/nestjs';
+import { CommandHandler } from '@nestjs/cqrs';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { UpdateConfigurationCommand } from '../../commands/update-configuration.command';
+import { UpdateConfigurationRequest } from '../dtos/update-configuration.request';
+import { Configuration } from '../entities/configuration';
+
+@CommandHandler(UpdateConfigurationCommand)
+export class UpdateConfigurationUseCase {
+  constructor(
+    private readonly _repository: ConfigurationRepository,
+    @InjectMapper() private readonly _mapper: Mapper,
+  ) {}
+
+  async execute(command: UpdateConfigurationCommand): Promise<Configuration> {
+    const entity = this._mapper.map(
+      command.updateConfigurationRequest,
+      UpdateConfigurationRequest,
+      Configuration,
+    );
+
+    try {
+      const configuration = await this._repository.update(
+        command.updateConfigurationRequest.uuid,
+        entity,
+      );
+      return configuration;
+    } catch (error) {
+      throw error;
+    }
+  }
+}

src/modules/configuration/mappers/configuration.profile.ts

@@ -0,0 +1,29 @@
+import { createMap, forMember, ignore, Mapper } from '@automapper/core';
+import { AutomapperProfile, InjectMapper } from '@automapper/nestjs';
+import { Injectable } from '@nestjs/common';
+import { ConfigurationPresenter } from '../adapters/primaries/configuration.presenter';
+import { CreateConfigurationRequest } from '../domain/dtos/create-configuration.request';
+import { UpdateConfigurationRequest } from '../domain/dtos/update-configuration.request';
+import { Configuration } from '../domain/entities/configuration';
+
+@Injectable()
+export class ConfigurationProfile extends AutomapperProfile {
+  constructor(@InjectMapper() mapper: Mapper) {
+    super(mapper);
+  }
+
+  override get profile() {
+    return (mapper: any) => {
+      createMap(mapper, Configuration, ConfigurationPresenter);
+
+      createMap(mapper, CreateConfigurationRequest, Configuration);
+
+      createMap(
+        mapper,
+        UpdateConfigurationRequest,
+        Configuration,
+        forMember((dest) => dest.uuid, ignore()),
+      );
+    };
+  }
+}

src/modules/configuration/queries/find-all-configurations.query.ts

@@ -0,0 +1,11 @@
+import { FindAllConfigurationsRequest } from '../domain/dtos/find-all-configurations.request';
+
+export class FindAllConfigurationsQuery {
+  page: number;
+  perPage: number;
+
+  constructor(findAllConfigurationsRequest?: FindAllConfigurationsRequest) {
+    this.page = findAllConfigurationsRequest?.page ?? 1;
+    this.perPage = findAllConfigurationsRequest?.perPage ?? 10;
+  }
+}

src/modules/configuration/queries/find-configuration-by-uuid.query.ts

@@ -0,0 +1,9 @@
+import { FindConfigurationByUuidRequest } from '../domain/dtos/find-configuration-by-uuid.request';
+
+export class FindConfigurationByUuidQuery {
+  readonly uuid: string;
+
+  constructor(findConfigurationByUuidRequest: FindConfigurationByUuidRequest) {
+    this.uuid = findConfigurationByUuidRequest.uuid;
+  }
+}

src/modules/configuration/tests/unit/create-configuration.usecase.spec.ts

@@ -0,0 +1,74 @@
+import { classes } from '@automapper/classes';
+import { AutomapperModule } from '@automapper/nestjs';
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { CreateConfigurationCommand } from '../../commands/create-configuration.command';
+import { CreateConfigurationRequest } from '../../domain/dtos/create-configuration.request';
+import { Domain } from '../../domain/dtos/domain.enum';
+import { Configuration } from '../../domain/entities/configuration';
+import { CreateConfigurationUseCase } from '../../domain/usecases/create-configuration.usecase';
+import { ConfigurationProfile } from '../../mappers/configuration.profile';
+
+const newConfigurationRequest: CreateConfigurationRequest = {
+  domain: Domain.user,
+  key: 'minAge',
+  value: '16',
+};
+const newConfigurationCommand: CreateConfigurationCommand =
+  new CreateConfigurationCommand(newConfigurationRequest);
+
+const mockConfigurationRepository = {
+  create: jest
+    .fn()
+    .mockImplementationOnce(() => {
+      return Promise.resolve({
+        ...newConfigurationRequest,
+        uuid: 'bb281075-1b98-4456-89d6-c643d3044a91',
+      });
+    })
+    .mockImplementation(() => {
+      throw new Error('Already exists');
+    }),
+};
+
+describe('CreateConfigurationUseCase', () => {
+  let createConfigurationUseCase: CreateConfigurationUseCase;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      imports: [AutomapperModule.forRoot({ strategyInitializer: classes() })],
+      providers: [
+        {
+          provide: ConfigurationRepository,
+          useValue: mockConfigurationRepository,
+        },
+        CreateConfigurationUseCase,
+        ConfigurationProfile,
+      ],
+    }).compile();
+
+    createConfigurationUseCase = module.get<CreateConfigurationUseCase>(
+      CreateConfigurationUseCase,
+    );
+  });
+
+  it('should be defined', () => {
+    expect(createConfigurationUseCase).toBeDefined();
+  });
+
+  describe('execute', () => {
+    it('should create and return a new configuration', async () => {
+      const newConfiguration: Configuration =
+        await createConfigurationUseCase.execute(newConfigurationCommand);
+
+      expect(newConfiguration.key).toBe(newConfigurationRequest.key);
+      expect(newConfiguration.uuid).toBeDefined();
+    });
+
+    it('should throw an error if configuration already exists', async () => {
+      await expect(
+        createConfigurationUseCase.execute(newConfigurationCommand),
+      ).rejects.toBeInstanceOf(Error);
+    });
+  });
+});

src/modules/configuration/tests/unit/delete-configuration.usecase.spec.ts

@@ -0,0 +1,90 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { DeleteConfigurationCommand } from '../../commands/delete-configuration.command';
+import { Domain } from '../../domain/dtos/domain.enum';
+import { DeleteConfigurationUseCase } from '../../domain/usecases/delete-configuration.usecase';
+
+const mockConfigurations = [
+  {
+    uuid: 'bb281075-1b98-4456-89d6-c643d3044a91',
+    domain: Domain.user,
+    key: 'key1',
+    value: 'value1',
+  },
+  {
+    uuid: 'bb281075-1b98-4456-89d6-c643d3044a92',
+    domain: Domain.user,
+    key: 'key2',
+    value: 'value2',
+  },
+  {
+    uuid: 'bb281075-1b98-4456-89d6-c643d3044a93',
+    domain: Domain.user,
+    key: 'key3',
+    value: 'value3',
+  },
+];
+
+const mockConfigurationRepository = {
+  delete: jest
+    .fn()
+    .mockImplementationOnce((uuid: string) => {
+      let savedConfiguration = {};
+      mockConfigurations.forEach((configuration, index) => {
+        if (configuration.uuid === uuid) {
+          savedConfiguration = { ...configuration };
+          mockConfigurations.splice(index, 1);
+        }
+      });
+      return savedConfiguration;
+    })
+    .mockImplementation(() => {
+      throw new Error('Error');
+    }),
+};
+
+describe('DeleteConfigurationUseCase', () => {
+  let deleteConfigurationUseCase: DeleteConfigurationUseCase;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        {
+          provide: ConfigurationRepository,
+          useValue: mockConfigurationRepository,
+        },
+        DeleteConfigurationUseCase,
+      ],
+    }).compile();
+
+    deleteConfigurationUseCase = module.get<DeleteConfigurationUseCase>(
+      DeleteConfigurationUseCase,
+    );
+  });
+
+  it('should be defined', () => {
+    expect(deleteConfigurationUseCase).toBeDefined();
+  });
+
+  describe('execute', () => {
+    it('should delete a configuration', async () => {
+      const savedUuid = mockConfigurations[0].uuid;
+      const deleteConfigurationCommand = new DeleteConfigurationCommand(
+        savedUuid,
+      );
+      await deleteConfigurationUseCase.execute(deleteConfigurationCommand);
+
+      const deletedConfiguration = mockConfigurations.find(
+        (configuration) => configuration.uuid === savedUuid,
+      );
+      expect(deletedConfiguration).toBeUndefined();
+    });
+    it('should throw an error if configuration does not exist', async () => {
+      await expect(
+        deleteConfigurationUseCase.execute(
+          new DeleteConfigurationCommand('wrong uuid'),
+        ),
+      ).rejects.toBeInstanceOf(Error);
+    });
+  });
+});

src/modules/configuration/tests/unit/find-all-configurations.usecase.spec.ts

@@ -0,0 +1,78 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { Domain } from '../../domain/dtos/domain.enum';
+import { FindAllConfigurationsRequest } from '../../domain/dtos/find-all-configurations.request';
+import { FindAllConfigurationsUseCase } from '../../domain/usecases/find-all-configurations.usecase';
+import { FindAllConfigurationsQuery } from '../../queries/find-all-configurations.query';
+
+const findAllConfigurationsRequest: FindAllConfigurationsRequest =
+  new FindAllConfigurationsRequest();
+findAllConfigurationsRequest.page = 1;
+findAllConfigurationsRequest.perPage = 10;
+
+const findAllConfigurationsQuery: FindAllConfigurationsQuery =
+  new FindAllConfigurationsQuery(findAllConfigurationsRequest);
+
+const mockConfigurations = [
+  {
+    uuid: 'bb281075-1b98-4456-89d6-c643d3044a91',
+    domain: Domain.user,
+    key: 'key1',
+    value: 'value1',
+  },
+  {
+    uuid: 'bb281075-1b98-4456-89d6-c643d3044a92',
+    domain: Domain.user,
+    key: 'key2',
+    value: 'value2',
+  },
+  {
+    uuid: 'bb281075-1b98-4456-89d6-c643d3044a93',
+    domain: Domain.user,
+    key: 'key3',
+    value: 'value3',
+  },
+];
+
+const mockConfigurationRepository = {
+  findAll: jest
+    .fn()
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    .mockImplementation((query?: FindAllConfigurationsQuery) => {
+      return Promise.resolve(mockConfigurations);
+    }),
+};
+
+describe('FindAllConfigurationsUseCase', () => {
+  let findAllConfigurationsUseCase: FindAllConfigurationsUseCase;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        {
+          provide: ConfigurationRepository,
+          useValue: mockConfigurationRepository,
+        },
+        FindAllConfigurationsUseCase,
+      ],
+    }).compile();
+
+    findAllConfigurationsUseCase = module.get<FindAllConfigurationsUseCase>(
+      FindAllConfigurationsUseCase,
+    );
+  });
+
+  it('should be defined', () => {
+    expect(findAllConfigurationsUseCase).toBeDefined();
+  });
+
+  describe('execute', () => {
+    it('should return an array filled with configurations', async () => {
+      const configurations = await findAllConfigurationsUseCase.execute(
+        findAllConfigurationsQuery,
+      );
+
+      expect(configurations).toBe(mockConfigurations);
+    });
+  });
+});

src/modules/configuration/tests/unit/find-configuration-by-uuid.usecase.spec.ts

@@ -0,0 +1,75 @@
+import { NotFoundException } from '@nestjs/common';
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { Domain } from '../../domain/dtos/domain.enum';
+import { FindConfigurationByUuidRequest } from '../../domain/dtos/find-configuration-by-uuid.request';
+import { FindConfigurationByUuidUseCase } from '../../domain/usecases/find-configuration-by-uuid.usecase';
+import { FindConfigurationByUuidQuery } from '../../queries/find-configuration-by-uuid.query';
+
+const mockConfiguration = {
+  uuid: 'bb281075-1b98-4456-89d6-c643d3044a91',
+  domain: Domain.user,
+  key: 'key1',
+  value: 'value1',
+};
+
+const mockConfigurationRepository = {
+  findOneByUuid: jest
+    .fn()
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    .mockImplementationOnce((query?: FindConfigurationByUuidQuery) => {
+      return Promise.resolve(mockConfiguration);
+    })
+    .mockImplementation(() => {
+      return Promise.resolve(undefined);
+    }),
+};
+
+describe('FindConfigurationByUuidUseCase', () => {
+  let findConfigurationByUuidUseCase: FindConfigurationByUuidUseCase;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      imports: [],
+      providers: [
+        {
+          provide: ConfigurationRepository,
+          useValue: mockConfigurationRepository,
+        },
+        FindConfigurationByUuidUseCase,
+      ],
+    }).compile();
+
+    findConfigurationByUuidUseCase = module.get<FindConfigurationByUuidUseCase>(
+      FindConfigurationByUuidUseCase,
+    );
+  });
+
+  it('should be defined', () => {
+    expect(findConfigurationByUuidUseCase).toBeDefined();
+  });
+
+  describe('execute', () => {
+    it('should return a Configuration', async () => {
+      const findConfigurationByUuidRequest: FindConfigurationByUuidRequest =
+        new FindConfigurationByUuidRequest();
+      findConfigurationByUuidRequest.uuid =
+        'bb281075-1b98-4456-89d6-c643d3044a91';
+      const Configuration = await findConfigurationByUuidUseCase.execute(
+        new FindConfigurationByUuidQuery(findConfigurationByUuidRequest),
+      );
+      expect(Configuration).toBe(mockConfiguration);
+    });
+    it('should throw an error if Configuration does not exist', async () => {
+      const findConfigurationByUuidRequest: FindConfigurationByUuidRequest =
+        new FindConfigurationByUuidRequest();
+      findConfigurationByUuidRequest.uuid =
+        'bb281075-1b98-4456-89d6-c643d3044a90';
+      await expect(
+        findConfigurationByUuidUseCase.execute(
+          new FindConfigurationByUuidQuery(findConfigurationByUuidRequest),
+        ),
+      ).rejects.toBeInstanceOf(NotFoundException);
+    });
+  });
+});

src/modules/configuration/tests/unit/update-configuration.usecase.spec.ts

@@ -0,0 +1,75 @@
+import { classes } from '@automapper/classes';
+import { AutomapperModule } from '@automapper/nestjs';
+import { Test, TestingModule } from '@nestjs/testing';
+import { ConfigurationRepository } from '../../adapters/secondaries/configuration.repository';
+import { UpdateConfigurationCommand } from '../../commands/update-configuration.command';
+import { UpdateConfigurationRequest } from '../../domain/dtos/update-configuration.request';
+import { Configuration } from '../../domain/entities/configuration';
+import { UpdateConfigurationUseCase } from '../../domain/usecases/update-configuration.usecase';
+import { ConfigurationProfile } from '../../mappers/configuration.profile';
+
+const originalConfiguration: Configuration = new Configuration();
+originalConfiguration.uuid = 'bb281075-1b98-4456-89d6-c643d3044a91';
+originalConfiguration.key = 'key1';
+
+const updateConfigurationRequest: UpdateConfigurationRequest = {
+  uuid: 'bb281075-1b98-4456-89d6-c643d3044a91',
+  key: 'Dane',
+};
+
+const updateConfigurationCommand: UpdateConfigurationCommand =
+  new UpdateConfigurationCommand(updateConfigurationRequest);
+
+const mockConfigurationRepository = {
+  update: jest
+    .fn()
+    .mockImplementationOnce((uuid: string, params: any) => {
+      originalConfiguration.key = params.key;
+
+      return Promise.resolve(originalConfiguration);
+    })
+    .mockImplementation(() => {
+      throw new Error('Error');
+    }),
+};
+
+describe('UpdateConfigurationUseCase', () => {
+  let updateConfigurationUseCase: UpdateConfigurationUseCase;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      imports: [AutomapperModule.forRoot({ strategyInitializer: classes() })],
+
+      providers: [
+        {
+          provide: ConfigurationRepository,
+          useValue: mockConfigurationRepository,
+        },
+        UpdateConfigurationUseCase,
+        ConfigurationProfile,
+      ],
+    }).compile();
+
+    updateConfigurationUseCase = module.get<UpdateConfigurationUseCase>(
+      UpdateConfigurationUseCase,
+    );
+  });
+
+  it('should be defined', () => {
+    expect(updateConfigurationUseCase).toBeDefined();
+  });
+
+  describe('execute', () => {
+    it('should update a configuration', async () => {
+      const updatedConfiguration: Configuration =
+        await updateConfigurationUseCase.execute(updateConfigurationCommand);
+
+      expect(updatedConfiguration.key).toBe(updateConfigurationRequest.key);
+    });
+    it('should throw an error if configuration does not exist', async () => {
+      await expect(
+        updateConfigurationUseCase.execute(updateConfigurationCommand),
+      ).rejects.toBeInstanceOf(Error);
+    });
+  });
+});

src/modules/database/database.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { PrismaService } from './src/adapters/secondaries/prisma-service';
+import { ConfigRepository } from './src/domain/configuration.repository';
+
+@Module({
+  providers: [PrismaService, ConfigRepository],
+  exports: [PrismaService, ConfigRepository],
+})
+export class DatabaseModule {}

src/modules/database/src/adapters/secondaries/prisma-repository.abstract.ts

@@ -0,0 +1,163 @@
+import { Injectable } from '@nestjs/common';
+import { PrismaClientKnownRequestError } from '@prisma/client/runtime';
+import { DatabaseException } from '../../exceptions/database.exception';
+import { ICollection } from '../../interfaces/collection.interface';
+import { IRepository } from '../../interfaces/repository.interface';
+import { PrismaService } from './prisma-service';
+
+/**
+ * Child classes MUST redefined _model property with appropriate model name
+ */
+@Injectable()
+export abstract class PrismaRepository<T> implements IRepository<T> {
+  protected _model: string;
+
+  constructor(protected readonly _prisma: PrismaService) {}
+
+  async findAll(
+    page = 1,
+    perPage = 10,
+    where?: any,
+    include?: any,
+  ): Promise<ICollection<T>> {
+    const [data, total] = await this._prisma.$transaction([
+      this._prisma[this._model].findMany({
+        where,
+        include,
+        skip: (page - 1) * perPage,
+        take: perPage,
+      }),
+      this._prisma[this._model].count({
+        where,
+      }),
+    ]);
+    return Promise.resolve({
+      data,
+      total,
+    });
+  }
+
+  async findOneByUuid(uuid: string): Promise<T> {
+    try {
+      const entity = await this._prisma[this._model].findUnique({
+        where: { uuid },
+      });
+
+      return entity;
+    } catch (e) {
+      if (e instanceof PrismaClientKnownRequestError) {
+        throw new DatabaseException(
+          PrismaClientKnownRequestError.name,
+          e.code,
+          e.message,
+        );
+      } else {
+        throw new DatabaseException();
+      }
+    }
+  }
+
+  async findOne(where: any, include?: any): Promise<T> {
+    try {
+      const entity = await this._prisma[this._model].findFirst({
+        where: where,
+        include: include,
+      });
+
+      return entity;
+    } catch (e) {
+      if (e instanceof PrismaClientKnownRequestError) {
+        throw new DatabaseException(PrismaClientKnownRequestError.name, e.code);
+      } else {
+        throw new DatabaseException();
+      }
+    }
+  }
+
+  async create(entity: Partial<T> | any, include?: any): Promise<T> {
+    try {
+      const res = await this._prisma[this._model].create({
+        data: entity,
+        include: include,
+      });
+
+      return res;
+    } catch (e) {
+      if (e instanceof PrismaClientKnownRequestError) {
+        throw new DatabaseException(
+          PrismaClientKnownRequestError.name,
+          e.code,
+          e.message,
+        );
+      } else {
+        throw new DatabaseException();
+      }
+    }
+  }
+
+  async update(uuid: string, entity: Partial<T>): Promise<T> {
+    try {
+      const updatedEntity = await this._prisma[this._model].update({
+        where: { uuid },
+        data: entity,
+      });
+
+      return updatedEntity;
+    } catch (e) {
+      if (e instanceof PrismaClientKnownRequestError) {
+        throw new DatabaseException(
+          PrismaClientKnownRequestError.name,
+          e.code,
+          e.message,
+        );
+      } else {
+        throw new DatabaseException();
+      }
+    }
+  }
+
+  async updateWhere(
+    where: any,
+    entity: Partial<T> | any,
+    include?: any,
+  ): Promise<T> {
+    try {
+      const updatedEntity = await this._prisma[this._model].update({
+        where: where,
+        data: entity,
+        include: include,
+      });
+
+      return updatedEntity;
+    } catch (e) {
+      if (e instanceof PrismaClientKnownRequestError) {
+        throw new DatabaseException(
+          PrismaClientKnownRequestError.name,
+          e.code,
+          e.message,
+        );
+      } else {
+        throw new DatabaseException();
+      }
+    }
+  }
+
+  async delete(uuid: string): Promise<T> {
+    try {
+      const entity = await this._prisma[this._model].delete({
+        where: { uuid },
+      });
+      return entity;
+    } catch (e) {
+      if (e instanceof PrismaClientKnownRequestError) {
+        throw new DatabaseException(
+          PrismaClientKnownRequestError.name,
+          e.code,
+          e.message,
+        );
+      } else {
+        throw new DatabaseException();
+      }
+    }
+  }
+}

src/modules/database/src/adapters/secondaries/prisma-service.ts

@@ -0,0 +1,15 @@
+import { INestApplication, Injectable, OnModuleInit } from '@nestjs/common';
+import { PrismaClient } from '@prisma/client';
+
+@Injectable()
+export class PrismaService extends PrismaClient implements OnModuleInit {
+  async onModuleInit() {
+    await this.$connect();
+  }
+
+  async enableShutdownHooks(app: INestApplication) {
+    this.$on('beforeExit', async () => {
+      await app.close();
+    });
+  }
+}

src/modules/database/src/domain/configuration.repository.ts

@@ -0,0 +1,3 @@
+import { PrismaRepository } from '../adapters/secondaries/prisma-repository.abstract';
+
+export class ConfigRepository<T> extends PrismaRepository<T> {}

src/modules/database/src/exceptions/database.exception.ts

@@ -0,0 +1,24 @@
+export class DatabaseException implements Error {
+  name: string;
+  message: string;
+
+  constructor(
+    private _type: string = 'unknown',
+    private _code: string = '',
+    message?: string,
+  ) {
+    this.name = 'DatabaseException';
+    this.message = message ?? 'An error occured with the database.';
+    if (this.message.includes('Unique constraint failed')) {
+      this.message = 'Already exists.';
+    }
+  }
+
+  get type(): string {
+    return this._type;
+  }
+
+  get code(): string {
+    return this._code;
+  }
+}

src/modules/database/src/interfaces/collection.interface.ts

@@ -0,0 +1,4 @@
+export interface ICollection<T> {
+  data: T[];
+  total: number;
+}

src/modules/database/src/interfaces/repository.interface.ts

@@ -0,0 +1,16 @@
+import { ICollection } from './collection.interface';
+
+export interface IRepository<T> {
+  findAll(
+    page: number,
+    perPage: number,
+    params?: any,
+    include?: any,
+  ): Promise<ICollection<T>>;
+  findOne(where: any, include?: any): Promise<T>;
+  findOneByUuid(uuid: string, include?: any): Promise<T>;
+  create(entity: Partial<T> | any, include?: any): Promise<T>;
+  update(uuid: string, entity: Partial<T>, include?: any): Promise<T>;
+  updateWhere(where: any, entity: Partial<T> | any, include?: any): Promise<T>;
+  delete(uuid: string): Promise<T>;
+}

src/modules/database/tests/unit/prisma-repository.spec.ts

@@ -0,0 +1,244 @@
+import { Injectable } from '@nestjs/common';
+import { Test, TestingModule } from '@nestjs/testing';
+import { PrismaService } from '../../src/adapters/secondaries/prisma-service';
+import { PrismaRepository } from '../../src/adapters/secondaries/prisma-repository.abstract';
+import { DatabaseException } from '../../src/exceptions/database.exception';
+
+class FakeEntity {
+  uuid?: string;
+  name: string;
+}
+
+let entityId = 2;
+const entityUuid = 'uuid-';
+const entityName = 'name-';
+
+const createRandomEntity = (): FakeEntity => {
+  const entity: FakeEntity = {
+    uuid: `${entityUuid}${entityId}`,
+    name: `${entityName}${entityId}`,
+  };
+
+  entityId++;
+
+  return entity;
+};
+
+const fakeEntityToCreate: FakeEntity = {
+  name: 'test',
+};
+
+const fakeEntityCreated: FakeEntity = {
+  ...fakeEntityToCreate,
+  uuid: 'some-uuid',
+};
+
+const fakeEntities: FakeEntity[] = [];
+Array.from({ length: 10 }).forEach(() => {
+  fakeEntities.push(createRandomEntity());
+});
+
+@Injectable()
+class FakePrismaRepository extends PrismaRepository<FakeEntity> {
+  protected _model = 'fake';
+}
+
+class FakePrismaService extends PrismaService {
+  fake: any;
+}
+
+const mockPrismaService = {
+  $transaction: jest.fn().mockImplementation(async (data: any) => {
+    const entities = await data[0];
+    if (entities.length == 1) {
+      return Promise.resolve([[fakeEntityCreated], 1]);
+    }
+
+    return Promise.resolve([fakeEntities, fakeEntities.length]);
+  }),
+  fake: {
+    create: jest.fn().mockResolvedValue(fakeEntityCreated),
+
+    findMany: jest.fn().mockImplementation((params?: any) => {
+      if (params?.where?.limit == 1) {
+        return Promise.resolve([fakeEntityCreated]);
+      }
+
+      return Promise.resolve(fakeEntities);
+    }),
+    count: jest.fn().mockResolvedValue(fakeEntities.length),
+
+    findUnique: jest.fn().mockImplementation(async (params?: any) => {
+      let entity;
+
+      if (params?.where?.uuid) {
+        entity = fakeEntities.find(
+          (entity) => entity.uuid === params?.where?.uuid,
+        );
+      }
+
+      if (!entity) {
+        throw new Error('no entity');
+      }
+
+      return entity;
+    }),
+
+    findFirst: jest.fn().mockImplementation((params?: any) => {
+      if (params?.where?.name) {
+        return Promise.resolve(
+          fakeEntities.find((entity) => entity.name === params?.where?.name),
+        );
+      }
+    }),
+
+    update: jest.fn().mockImplementation((params: any) => {
+      const entity = fakeEntities.find(
+        (entity) => entity.uuid === params.where.uuid,
+      );
+      Object.entries(params.data).map(([key, value]) => {
+        entity[key] = value;
+      });
+
+      return Promise.resolve(entity);
+    }),
+
+    delete: jest.fn().mockImplementation((params: any) => {
+      let found = false;
+
+      fakeEntities.forEach((entity, index) => {
+        if (entity.uuid === params?.where?.uuid) {
+          found = true;
+          fakeEntities.splice(index, 1);
+        }
+      });
+
+      if (!found) {
+        throw new Error();
+      }
+    }),
+  },
+};
+
+describe('PrismaRepository', () => {
+  let fakeRepository: FakePrismaRepository;
+  let prisma: FakePrismaService;
+
+  beforeAll(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [
+        FakePrismaRepository,
+        {
+          provide: PrismaService,
+          useValue: mockPrismaService,
+        },
+      ],
+    }).compile();
+
+    fakeRepository = module.get<FakePrismaRepository>(FakePrismaRepository);
+    prisma = module.get<PrismaService>(PrismaService) as FakePrismaService;
+  });
+
+  it('should be defined', () => {
+    expect(fakeRepository).toBeDefined();
+    expect(prisma).toBeDefined();
+  });
+
+  describe('findAll', () => {
+    it('should return an array of entities', async () => {
+      jest.spyOn(prisma.fake, 'findMany');
+      jest.spyOn(prisma.fake, 'count');
+      jest.spyOn(prisma, '$transaction');
+
+      const entities = await fakeRepository.findAll();
+      expect(entities).toStrictEqual({
+        data: fakeEntities,
+        total: fakeEntities.length,
+      });
+    });
+
+    it('should return an array containing only one entity', async () => {
+      const entities = await fakeRepository.findAll(1, 10, { limit: 1 });
+
+      expect(prisma.fake.findMany).toHaveBeenCalledWith({
+        skip: 0,
+        take: 10,
+        where: { limit: 1 },
+      });
+      expect(entities).toEqual({
+        data: [fakeEntityCreated],
+        total: 1,
+      });
+    });
+  });
+
+  describe('create', () => {
+    it('should create an entity', async () => {
+      jest.spyOn(prisma.fake, 'create');
+
+      const newEntity = await fakeRepository.create(fakeEntityToCreate);
+      expect(newEntity).toBe(fakeEntityCreated);
+      expect(prisma.fake.create).toHaveBeenCalledTimes(1);
+    });
+  });
+
+  describe('findOne', () => {
+    it('should find an entity by uuid', async () => {
+      const entity = await fakeRepository.findOneByUuid(fakeEntities[0].uuid);
+      expect(entity).toBe(fakeEntities[0]);
+    });
+
+    it('should throw a DatabaseException if uuid is not found', async () => {
+      await expect(
+        fakeRepository.findOneByUuid('wrong-uuid'),
+      ).rejects.toBeInstanceOf(DatabaseException);
+    });
+  });
+
+  describe('update', () => {
+    it('should update an entity', async () => {
+      const newName = 'random-name';
+
+      await fakeRepository.update(fakeEntities[0].uuid, {
+        name: newName,
+      });
+      expect(fakeEntities[0].name).toBe(newName);
+    });
+
+    it("should throw an exception if an entity doesn't exist", async () => {
+      await expect(
+        fakeRepository.update('fake-uuid', { name: 'error' }),
+      ).rejects.toBeInstanceOf(DatabaseException);
+    });
+  });
+
+  describe('delete', () => {
+    it('should delete an entity', async () => {
+      const savedUuid = fakeEntities[0].uuid;
+
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      const res = await fakeRepository.delete(savedUuid);
+
+      const deletedEntity = fakeEntities.find(
+        (entity) => entity.uuid === savedUuid,
+      );
+      expect(deletedEntity).toBeUndefined();
+    });
+
+    it("should throw an exception if an entity doesn't exist", async () => {
+      await expect(fakeRepository.delete('fake-uuid')).rejects.toBeInstanceOf(
+        DatabaseException,
+      );
+    });
+  });
+
+  describe('findOne', () => {
+    it('should find one entity', async () => {
+      const entity = await fakeRepository.findOne({
+        name: fakeEntities[0].name,
+      });
+
+      expect(entity.name).toBe(fakeEntities[0].name);
+    });
+  });
+});

src/utils/pipes/rpc.validation-pipe.ts

@@ -0,0 +1,14 @@
+import { Injectable, ValidationPipe } from '@nestjs/common';
+import { RpcException } from '@nestjs/microservices';
+
+@Injectable()
+export class RpcValidationPipe extends ValidationPipe {
+  createExceptionFactory() {
+    return (validationErrors = []) => {
+      return new RpcException({
+        code: 3,
+        message: this.flattenValidationErrors(validationErrors),
+      });
+    };
+  }
+}