Added jest

.gitignore

@@ -17,4 +17,6 @@ logs
 *.log
 .yarnclean
 
-_old
+_old
+
+coverage

jest.config.js

@@ -0,0 +1,11 @@
+module.exports = {
+    collectCoverage: true,
+    testURL: 'http://localhost',
+
+    modulePathIgnorePatterns: [
+        'node_modules',
+    ],
+    transformIgnorePatterns: [
+        'src/babel',
+    ],
+};

package.json

@@ -18,10 +18,12 @@
         "dev": "webpack-dev-server --config ./webpack/config.dev.babel.js --mode development",
         "build": "rm -rf build && webpack --config ./webpack/config.prod.babel.js --progress",
         "flow": "flow check src/js",
-        "test": "",
-        "lint": "npx eslint ./ --fix"
+        "lint": "npx eslint ./src ./webpack",
+        "test-unit": "jest",
+        "test-unit:watch": "jest -o --watch"
     },
     "dependencies": {
+        "bignumber.js": "^7.2.1",
         "color-hash": "^1.0.3",
         "copy-webpack-plugin": "^4.5.2",
         "ethereumjs-tx": "^1.3.3",
@@ -50,13 +52,15 @@
         "redux-thunk": "^2.2.0",
         "trezor-connect": "5.0.13",
         "web3": "^0.19.0",
-        "webpack": "^4.16.3"
+        "webpack": "^4.16.3",
+        "whatwg-fetch": "^2.0.4",
+        "yarn-run-all": "^3.1.1"
     },
     "devDependencies": {
         "babel-cli": "^6.24.1",
         "babel-eslint": "^8.2.6",
         "babel-loader": "7.1.4",
-        "babel-plugin-root-import": "^5.1.0",
+        "babel-plugin-root-import": "^6.1.0",
         "babel-plugin-transform-class-properties": "^6.24.1",
         "babel-plugin-transform-flow-strip-types": "^6.22.0",
         "babel-plugin-transform-object-rest-spread": "^6.23.0",
@@ -73,11 +77,11 @@
         "eslint-plugin-react": "^7.10.0",
         "file-loader": "1.1.11",
         "flow-bin": "0.72.0",
+        "jest": "^23.4.2",
         "less": "^3.0.1",
         "less-loader": "4.1.0",
         "webpack-cli": "^2.1.3",
         "webpack-dev-server": "^3.1.4",
-        "whatwg-fetch": "^2.0.3",
         "yargs": "11.0.0"
     }
 }

src/js/utils/__tests__/ethUtils.test.js

@@ -0,0 +1,9 @@
+import * as ethUtils from '../ethUtils';
+
+it('decimalToHex', () => {
+    const input = [0, 1, 2, 100, 999];
+
+    input.forEach((entry) => {
+        expect(ethUtils.decimalToHex(entry)).toMatchSnapshot();
+    });
+});