NestにてDDDを行う場合moduleが一つにまとまるが、defaultのjestだとmodule全てのトランスパイラを行うため実行速度がかなり遅くなる。

beforeAll(async () => {
  module = await appTestingModule();
  accountRepository = module.get<AccountRepositoryInterface>(moduleConst.ACCOUNT_REPOSITORY);
});

そのため、お手軽にSWCを導入して実行速度を上げた。

{
  "$schema": "https://json.schemastore.org/swcrc",
  "jsc": {
    "parser": {
      "syntax": "typescript",
      "decorators": true,
      "dynamicImport": true
    },
    "transform": {
      "legacyDecorator": true,
      "decoratorMetadata": true
    },
    "target": "es2021",
    "keepClassNames": true,
    "baseUrl": "./",
    "paths": {
      "@hoge/*": [
        "./src/*"
      ]
    }
  },
  "module": {
    "type": "commonjs",
    "strict": true
  },
  "sourceMaps": true,
  "exclude": [
    "node_modules",
    "dist"
  ]
}

{
  "moduleFileExtensions": ["js", "json", "ts"],
  "rootDir": "src",
  "testMatch": ["**/?(*.)+(spec|test).[jt]s?(x)"],
  "transform": {
    "^.+\\.(t|j)s$": [
      "@swc/jest",
      {
        "sourceMaps": true,
        "jsc": {
          "parser": {
            "syntax": "typescript",
            "decorators": true,
            "dynamicImport": true
          },
          "transform": {
            "legacyDecorator": true,
            "decoratorMetadata": true
          },
          "target": "es2021",
          "keepClassNames": true,
          "baseUrl": "./",
          "paths": {
            "@hoge/*": ["./src/*"]
          }
        },
        "module": {
          "type": "commonjs",
          "strict": true
        }
      }
    ]
  },
  "collectCoverageFrom": ["**/*.(t|j)s"],
  "coverageDirectory": "../coverage",
  "testEnvironment": "node",
  "setupFiles": ["<rootDir>/test-utils/testSetup.ts"],
  "moduleNameMapper": {
    "^@hoge/(.*)$": "<rootDir>/$1"
  },
  "workerIdleMemoryLimit": "1024MB"
}