NET-177: Add TypeScript support

.babel.config.js

@@ -18,7 +18,8 @@ module.exports = {
                 ]
             },
             exclude: ['transform-regenerator', '@babel/plugin-transform-regenerator']
-        }]
+        }],
+        ['@babel/preset-typescript']
     ],
     plugins: [
          "add-module-exports",

.babel.node.config.js

@@ -10,7 +10,8 @@ module.exports = {
             targets: {
                 node: true
             }
-        }]
+        }],
+        ['@babel/preset-typescript']
     ],
     plugins: [
         'add-module-exports',

.eslintrc.js

@@ -1,5 +1,8 @@
 module.exports = {
-    parser: 'babel-eslint',
+    parser: '@typescript-eslint/parser',
+    plugins: [
+        '@typescript-eslint'
+    ],
     extends: [
         'streamr-nodejs'
     ],
@@ -31,5 +34,21 @@ module.exports = {
         'no-restricted-syntax': [
             'error', 'ForInStatement', 'LabeledStatement', 'WithStatement'
         ],
+        'import/extensions': ['error', 'never', { json: 'always' }],
+        'lines-between-class-members': 'off',
+        'padded-blocks': 'off',
+        'no-use-before-define': 'off',
+        'import/order': 'off',
+        'no-shadow': 'off',
+        '@typescript-eslint/no-shadow': 'error',
+        'no-unused-vars': 'off',
+        '@typescript-eslint/no-unused-vars': ['error']
+    },
+    settings: {
+        'import/resolver': {
+            node: {
+                extensions: ['.js', '.ts']
+            }
+        }
     }
 }

.github/workflows/nodejs.yml

@@ -157,9 +157,14 @@ jobs:
         uses: streamr-dev/streamr-docker-dev-action@v1.0.0-alpha.2
         with:
           services-to-start: "mysql redis engine-and-editor cassandra parity-node0 parity-sidechain-node0 bridge broker-node-storage-1 nginx smtp"
-      - name: test-browser
-        timeout-minutes: 2
-        run: npm run test-browser
+
+      - uses: nick-invision/retry@v2
+        name: Run Test
+        with:
+          max_attempts: 3
+          timeout_minutes: 3
+          retry_on: error
+          command: npm run test-browser
 
   benchmarks:
     name: Test Benchmark using Node ${{ matrix.node-version }}

jest.config.js

@@ -163,7 +163,7 @@ module.exports = {
 
     // A map from regular expressions to paths to transformers
     transform: {
-        '\\.js$': ['babel-jest', {
+        '\\.(js|ts)$': ['babel-jest', {
             configFile: path.resolve(__dirname, '.babel.node.config.js'),
             babelrc: false,
         }]