Add tests

package.json

@@ -22,13 +22,17 @@
     "eslint-config-airbnb": "^14.1.0",
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-jsx-a11y": "^4.0.0",
-    "eslint-plugin-react": "^6.10.0"
+    "eslint-plugin-react": "^6.10.0",
+    "remark": "^7.0.0",
+    "remark-lint": "^6.0.0",
+    "tape": "^4.6.3"
   },
   "scripts": {
     "lint": "eslint .",
     "build-lib": "babel lib -d dist",
     "build": "npm run build-lib",
-    "test": "npm run lint && npm run build"
+    "test-api": "node test",
+    "test": "npm run lint && npm run build && npm run test-api"
   },
   "bugs": {
     "url": "https://github.com/vhf/remark-lint-blank-lines-1-0-2/issues"

test.js

@@ -0,0 +1,42 @@
+const test = require('tape');
+const remark = require('remark');
+const lint = require('remark-lint');
+const alphabetizeLists = require('./');
+
+const processor = remark().use(lint).use(alphabetizeLists);
+
+const nok = `* [An Awesome Book](http://example.com/example.html)
+
+### Example
+* [Another Awesome Book](http://example.com/book.html)
+
+* [Some Other Book](http://example.com/other.html)
+`;
+
+const ok = `* [An Awesome Book](http://example.com/example.html)
+
+
+### Example
+
+* [Another Awesome Book](http://example.com/book.html)
+* [Some Other Book](http://example.com/other.html)
+`;
+
+test('remark-lint-alphabetize-lists', (t) => {
+  t.deepEqual(
+    processor.processSync(ok).messages.map(String),
+    [],
+    'should work on valid fixtures'
+  );
+
+  t.deepEqual(
+    processor.processSync(nok).messages.map(String),
+    [
+      '1:1-1:53: Incorrect number of blank lines between last section and next heading',
+      '3:1-3:12: Incorrect number of blank lines between heading and section'
+    ],
+    'should work on valid fixtures'
+  );
+
+  t.end();
+});