Merge pull request #3 from dmackca/feature/jest

add basic unit tests

Author: dmackca

.github/workflows/node-tests.yml

@@ -0,0 +1,31 @@
+name: Node.js yarn CI
+
+on:
+  push:
+    branches: [ '**' ]
+  pull_request:
+    branches: [ '**' ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: Borales/actions-yarn@v2.1.0
+      with:
+        cmd: install # will run `yarn install` command
+    - uses: Borales/actions-yarn@v2.1.0
+      with:
+        cmd: lint # will run `yarn build` command
+    - uses: Borales/actions-yarn@v2.1.0
+      with:
+        cmd: build # will run `yarn build` command
+    - uses: Borales/actions-yarn@v2.1.0
+      with:
+        cmd: test # will run `yarn test` command

package.json

@@ -16,7 +16,8 @@
   },
   "scripts": {
     "build": "bili --input src/vue-filter-number-format.js --format esm-min --format cjs-min",
-    "lint": "eslint ./src"
+    "lint": "eslint ./src",
+    "test": "jest"
   },
   "dependencies": {},
   "browserslist": [
@@ -29,7 +30,9 @@
     "eslint": "^6.2.1",
     "eslint-config-airbnb-base": "^14.0.0",
     "eslint-config-foundryspatial": "2.1.2",
-    "eslint-plugin-import": "^2.18.2"
+    "eslint-plugin-import": "^2.18.2",
+    "jest": "^25.3.0",
+    "numeral": "^2.0.6"
   },
   "peerDependencies": {
     "numeral": "^2.0.0"

tests/unit/vue-filter-number-format.spec.js

@@ -0,0 +1,16 @@
+const numeral = require('numeral');
+const numFormat = require('../../dist/vue-filter-number-format.min.js')(numeral);
+
+test('Adds commas to big numbers', () => {
+  expect(numFormat(69696969)).toBe('69,696,969');
+});
+
+test('Returns a string, even if no commas added', () => {
+  expect(numFormat(123)).toBe('123');
+  expect(numFormat('456')).toBe('456');
+});
+
+test('Accepts custom formats', () => {
+  expect(numFormat(420, '0.000')).toBe('420.000');
+  expect(numFormat(666, '0,0o')).toBe('666th');
+});