Add log class and add some functins

Add jest for test units
Updated the package and lib

.vscode/launch.json

@@ -0,0 +1,20 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Jest Current File",
+            "program": "${workspaceFolder}/node_modules/.bin/jest",
+            "args": ["${relativeFile}"],
+            "console": "integratedTerminal",
+            "internalConsoleOptions": "neverOpen",
+            "windows": {
+                "program": "${workspaceFolder}/node_modules/jest/bin/jest"
+            }
+        }
+    ]
+}

jest.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+    transform: { '^.+\\.ts?$': 'ts-jest' },
+    testEnvironment: 'node',
+    testRegex: '/tests/.*\\.(test|spec)?\\.(ts|tsx)$',
+    moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node']
+};

package.json

@@ -9,17 +9,22 @@
     "private": false,
     "dependencies": {},
     "devDependencies": {
+        "@types/jest": "^26.0.20",
         "@typescript-eslint/eslint-plugin": "^4.17.0",
         "@typescript-eslint/parser": "^4.17.0",
         "eslint": "^7.21.0",
         "eslint-config-prettier": "^8.1.0",
         "eslint-plugin-prettier": "^3.3.1",
+        "jest": "^26.6.3",
         "prettier": "^2.2.1",
+        "ts-jest": "^26.5.3",
         "typescript": "^4.2.3"
     },
     "scripts": {
         "build": "tsc -p tsconfig.json",
         "lint": "eslint . --ext .ts",
-    "prettier": "prettier --config .prettierrc 'src/**/*.ts' --write"
+        "prettier": "prettier --config .prettierrc 'src/**/*.ts' --write",
+        "test": "jest",
+        "coverage": "jest --coverage"
     }
 }

src/log/Log.ts

@@ -0,0 +1,31 @@
+import { Loggable } from "./interfaces";
+
+class Log {
+    static log(loggable: Loggable): void {
+        switch (loggable.type) {
+            case 'error':
+                this.error(loggable.from, loggable.data)
+                break;
+            case 'warn':
+                this.warn(loggable.from, loggable.data)
+                break;
+            default:
+                this.info(loggable.from, loggable.data)
+                break;
+        }
+    }
+
+    static info(...data: any[]): void {
+        console.log(data);
+    }
+
+    static error(...data: any[]): void {
+        console.error(data)
+    }
+
+    static warn(...data: any[]): void {
+        console.warn(data)
+    }
+}
+
+export default Log;

src/log/interfaces.ts

@@ -0,0 +1,7 @@
+type LogType = 'info' | 'error' | 'warn'
+
+export interface Loggable {
+    type: LogType;
+    from?: string;
+    data?: any;
+}

tests/log.test.ts

@@ -0,0 +1,23 @@
+import Log from '../src/log/Log';
+
+describe('loggin into console', function () {
+    it('info', function () {
+        Log.info('I am an info!');
+    });
+
+    it('warn', function () {
+        Log.info('I am a warn!');
+    });
+
+    it('error', function () {
+        Log.info('I am an error!');
+    });
+
+    it('loggable', function () {
+        Log.log({
+            type: 'info',
+            from: 'log.test.ts',
+            data: 'I am loggable called'
+        });
+    });
+});

tsconfig.json

@@ -11,11 +11,11 @@
         "module": "commonjs",
         "moduleResolution": "node",
         "resolveJsonModule": true,
-        "isolatedModules": true,
         "noEmit": true,
         "declaration": true,
         "outDir": "dist",
-        "rootDir": "src"
+        "rootDir": "src",
     },
-    "include": ["src/**/*"]
+    "include": ["src/**/*"],
+    "exclude": ["node_modules"]
 }