Migrate @storybook/node-logger to TypeScript

lib/node-logger/package.json

@@ -15,7 +15,7 @@
   },
   "license": "MIT",
   "main": "dist/index.js",
-  "jsnext:main": "src/index.js",
+  "types": "dist/index.d.ts",
   "scripts": {
     "prepare": "node ../../scripts/prepare.js"
   },
@@ -26,6 +26,10 @@
     "pretty-hrtime": "^1.0.3",
     "regenerator-runtime": "^0.12.1"
   },
+  "devDependencies": {
+    "@types/npmlog": "^4.1.1",
+    "@types/pretty-hrtime": "^1.0.0"
+  },
   "publishConfig": {
     "access": "public"
   }

lib/node-logger/src/index.test.ts

@@ -0,0 +1,34 @@
+import { info, warn, error } from 'npmlog';
+import { logger } from '.';
+
+jest.mock('npmlog', () => ({
+  info: jest.fn(),
+  warn: jest.fn(),
+  error: jest.fn(),
+}));
+
+describe('node-logger', () => {
+  beforeEach(() => {
+    // This feels odd but TypeScript doesn't understand that the imported
+    // npmlog module is being wrapped by Jest so we are type casting here
+    // in order to be allowed to call Jest's mockReset() method.
+    ((info as any) as jest.MockInstance<any>).mockReset();
+    ((warn as any) as jest.MockInstance<any>).mockReset();
+    ((error as any) as jest.MockInstance<any>).mockReset();
+  });
+  it('should have an info method', () => {
+    const message = 'information';
+    logger.info(message);
+    expect(info).toHaveBeenCalledWith('', message);
+  });
+  it('should have a warn method', () => {
+    const message = 'warning message';
+    logger.warn(message);
+    expect(warn).toHaveBeenCalledWith('', message);
+  });
+  it('should have an error method', () => {
+    const message = 'error message';
+    logger.error(message);
+    expect(error).toHaveBeenCalledWith('', message);
+  });
+});

lib/node-logger/src/index.js → lib/node-logger/src/index.ts

@@ -13,8 +13,9 @@ export const colors = {
 };
 
 export const logger = {
-  info: message => npmLog.info('', message),
-  warn: message => npmLog.warn('', message),
-  error: message => npmLog.error('', message),
-  trace: ({ message, time }) => npmLog.info(`${message} (${colors.purple(prettyTime(time))})`),
+  info: (message: string): void => npmLog.info('', message),
+  warn: (message: string): void => npmLog.warn('', message),
+  error: (message: string): void => npmLog.error('', message),
+  trace: ({ message, time }: { message: string; time: [number, number] }): void =>
+    npmLog.info('', `${message} (${colors.purple(prettyTime(time))})`),
 };

lib/node-logger/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "./src"
+  },
+  "include": ["src/**/*"],
+  "exclude": ["src/**.test.ts"]
+}

yarn.lock

@@ -2369,13 +2369,23 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-6.14.2.tgz#40b3dbb1221c7d66802cbcc32fe3b85e54569c77"
   integrity sha512-JWB3xaVfsfnFY8Ofc9rTB/op0fqqTSqy4vBcVk1LuRJvta7KTX+D//fCkiTMeLGhdr2EbFZzQjC97gvmPilk9Q==
 
+"@types/npmlog@^4.1.1":
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/@types/npmlog/-/npmlog-4.1.1.tgz#b51cf39a6324a4ede17ef72dfa58a64fbefb39c7"
+  integrity sha512-uCZpakN0HrNsX+rZeXwCPByanpTN+dB3iApOrV4uggG955GZOw1YVziEpH6YDE60/+H95Jztg48UQ0NGZ6TPag==
+
 "@types/parse5@^2.2.32":
   version "2.2.34"
   resolved "https://registry.yarnpkg.com/@types/parse5/-/parse5-2.2.34.tgz#e3870a10e82735a720f62d71dcd183ba78ef3a9d"
   integrity sha1-44cKEOgnNacg9i1x3NGDunjvOp0=
   dependencies:
     "@types/node" "*"
 
+"@types/pretty-hrtime@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@types/pretty-hrtime/-/pretty-hrtime-1.0.0.tgz#c5a2d644a135e988b2932f99737e67b3c62528d0"
+  integrity sha512-xl+5r2rcrxdLViAYkkiLMYsoUs3qEyrAnHFyEzYysgRxdVp3WbhysxIvJIxZp9FvZ2CYezh0TaHZorivH+voOQ==
+
 "@types/prop-types@*", "@types/prop-types@^15.5.7":
   version "15.5.8"
   resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.5.8.tgz#8ae4e0ea205fe95c3901a5a1df7f66495e3a56ce"