Start adding tests.

.eslintrc.json

@@ -10,6 +10,10 @@
     "rules": {
         "require-jsdoc": "off",
         "indent": ["error", 4],
-        "max-len": ["error", { "code": 120 }]
-    }
+        "max-len": ["error", { "code": 120 }],
+        "mocha/no-exclusive-tests": "error"
+    },
+    "plugins": [
+        "mocha"
+    ]
 }

.travis.yml

@@ -11,11 +11,12 @@ node_js:
 install:
   - npm install
 
-script:
+before_script:
+  - npm test
   - npm run verify-homeassistant-mapping
   - npm run eslint
 
-after_success:
+script:
   - ".travis/docker.sh"
   - ".travis/wiki.sh"
   - ".travis/trigger-downstream.sh"

package.json

@@ -17,10 +17,12 @@
     "cc2531"
   ],
   "scripts": {
-    "start": "node index.js",
+    "coverage": "nyc --all report --reporter=text mocha --recursive --timeout=3000",
     "docgen": "node support/docgen.js",
-    "verify-homeassistant-mapping": "node support/verify-homeassistant-mapping.js",
-    "eslint": "node_modules/.bin/eslint ."
+    "eslint": "node_modules/.bin/eslint .",
+    "start": "node index.js",
+    "test": "mocha --recursive",
+    "verify-homeassistant-mapping": "node support/verify-homeassistant-mapping.js"
   },
   "author": "Koen Kanters",
   "license": "GPL-3.0",
@@ -40,7 +42,13 @@
     "zigbee-shepherd-converters": "*"
   },
   "devDependencies": {
+    "chai": "*",
+    "chai-spies": "*",
     "eslint": "*",
-    "eslint-config-google": "*"
+    "eslint-config-google": "*",
+    "eslint-plugin-mocha": "*",
+    "mocha": "*",
+    "nyc": "*",
+    "proxyquire": "*"
   }
 }

test/data.test.js

@@ -0,0 +1,23 @@
+/* global describe, it */
+
+const chai = require('chai');
+const proxyquire = require('proxyquire').noPreserveCache();
+const data = () => proxyquire('../lib/util/data.js', {});
+const path = require('path');
+
+describe('Data', () => {
+    describe('Get path', () => {
+        it('Should return correct path', () => {
+            const expected = path.normalize(path.join(__dirname, '..', 'data'));
+            const actual = data().getPath();
+            chai.assert.strictEqual(actual, expected);
+        });
+
+        it('Should return correct path when ZIGBEE2MQTT_DATA set', () => {
+            const expected = path.join('var', 'zigbee2mqtt');
+            process.env.ZIGBEE2MQTT_DATA = expected;
+            const actual = data().getPath();
+            chai.assert.strictEqual(actual, expected);
+        });
+    });
+});