feat: Logger library

Author: helderberto

src/config.js

@@ -0,0 +1,29 @@
+const config = (() => {
+  const defaultConfig = {
+    success: {
+      emoji: '✅'
+    },
+    info: {
+      emoji: 'ℹ️'
+    },
+    warn: {
+      emoji: '⚠️'
+    },
+    error: {
+      emoji: '🚫'
+    }
+  };
+
+  const setEmoji = ({ type, emoji }) => {
+    defaultConfig[type].emoji = emoji;
+  };
+
+  const getEmoji = type => defaultConfig[type].emoji;
+
+  return {
+    setEmoji,
+    getEmoji
+  };
+})();
+
+export default config;

src/index.js

@@ -1,3 +1,46 @@
-export function sum(x, y) {
-  return x + y;
-}
+import config from './config';
+
+const Logger = (() => {
+  function createMessage(type, message) {
+    const emoji = config.getEmoji(type);
+    return `${emoji} ${message}`;
+  }
+
+  function success(message, ...args) {
+    const logMessage = createMessage('success', message);
+    console.log.call(console, logMessage, ...args);
+
+    return logMessage;
+  }
+
+  function info(message, ...args) {
+    const logMessage = createMessage('info', message);
+    console.log.call(console, logMessage, ...args);
+
+    return logMessage;
+  }
+
+  function warn(message, ...args) {
+    const logMessage = createMessage('warn', message);
+    console.warn.call(console, logMessage, ...args);
+
+    return logMessage;
+  }
+
+  function error(message, ...args) {
+    const logMessage = createMessage('error', message);
+    console.error.call(console, logMessage, ...args);
+
+    return logMessage;
+  }
+
+  return {
+    success,
+    info,
+    warn,
+    error,
+    setEmoji: config.setEmoji
+  };
+})();
+
+export default Logger;

tests/logger.test.js

@@ -0,0 +1,27 @@
+import Logger from '../src';
+
+describe('Logger', () => {
+  test('should create Logger.success', () => {
+    expect(Logger.success('Success message example')).toEqual(
+      '✅ Success message example'
+    );
+  });
+
+  test('should create Logger.info', () => {
+    expect(Logger.info('Informational message example')).toEqual(
+      'ℹ️ Informational message example'
+    );
+  });
+
+  test('should create Logger.warn', () => {
+    expect(Logger.warn('Warning message example')).toEqual(
+      '⚠️ Warning message example'
+    );
+  });
+
+  test('should create Logger.error', () => {
+    expect(Logger.error('Error message example')).toEqual(
+      '🚫 Error message example'
+    );
+  });
+});