Added a test suite with chai and mocha

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015"]
+}

.gitignore

@@ -0,0 +1,2 @@
+node_modules
+typings

package.json

@@ -4,7 +4,7 @@
   "description": "A comparator function for comparing two persian strings with correct alphabetic order.",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "BABEL_ENV=commonjs mocha --compilers js:babel-core/register --reporter spec test/*.js"
   },
   "repository": {
     "type": "git",
@@ -19,5 +19,11 @@
   "bugs": {
     "url": "https://github.com/martianboy/persian-alphabetic-compare/issues"
   },
-  "homepage": "https://github.com/martianboy/persian-alphabetic-compare#readme"
+  "homepage": "https://github.com/martianboy/persian-alphabetic-compare#readme",
+  "devDependencies": {
+    "babel-core": "^6.16.0",
+    "babel-preset-es2015": "^6.16.0",
+    "chai": "^3.5.0",
+    "mocha": "^3.1.0"
+  }
 }

test/index.js

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+import chai from 'chai';
+import compare from '..';
+
+describe('persianStringCompare', () => {
+    function expect_letter_compare(letters) {
+        return chai.expect(compare.apply(null, letters.split('|')));
+    }
+
+    it("must place Persian letter Peh after Beh and before Teh", () => {
+        expect_letter_compare('ب|پ').to.be.lessThan(0);
+        expect_letter_compare('پ|ت').to.be.lessThan(0);
+    });
+    it("must place Persian letter Cheh after Jim and before Heh", () => {
+        expect_letter_compare('ج|چ').to.be.lessThan(0);
+        expect_letter_compare('چ|ح').to.be.lessThan(0);
+    });
+    it("must place Persian letter Jeh after Zeh and before Sin", () => {
+        expect_letter_compare('ز|ژ').to.be.lessThan(0);
+        expect_letter_compare('ژ|س').to.be.lessThan(0);
+    });
+    it("must place Persian letter Kaf at the same place as Arabic Keh", () => {
+        expect_letter_compare('ك|ک').to.be.eq(0);
+    });
+    it("must place Persian letter Gaf after Kaf", () => {
+        expect_letter_compare('ک|گ').to.be.lessThan(0);
+        expect_letter_compare('گ|ل').to.be.lessThan(0);
+    });
+    it("must place Arabic letter Teh marbuta after Persian Heh.", () => {
+        expect_letter_compare('ه|ة').to.be.lessThan(0);
+        expect_letter_compare('ة|و').to.be.lessThan(0);
+    });
+    it("must place Persian letter Heh with Yeh above at the same place as Arabic Teh marbuta", () => {
+        expect_letter_compare('ۀ|ة').to.be.eq(0);
+    });
+    it("must place Arabic letter Waw with Hamza above after Persian Heh.", () => {
+        expect_letter_compare('و|ؤ').to.be.lessThan(0);
+        expect_letter_compare('ؤ|ی').to.be.lessThan(0);
+    });
+    it("must place Persian letter Yeh at the same place as Arabic Yeh with two dots below", () => {
+        expect_letter_compare('ي|ی').to.be.eq(0);
+    });
+    it('must place Arabic letter Yeh with Hamza above after Persian Yeh', () => {
+        expect_letter_compare('ی|ئ').to.be.lessThan(0);
+    });
+
+    it('must handle words with same first letters', () => {
+        chai.expect(compare('کردکوی', 'کرمانشاه')).to.be.lessThan(0);
+    });
+
+    it('must ignore Arabic diacritics', () => {
+        chai.expect(compare('امّا', 'اما')).to.be.eq(0);
+    });
+
+    it('must ignore Arabic diacritics at the end of the strings', () => {
+        chai.expect(compare('مثلاٌ', 'مثلا')).to.be.eq(0);        
+    });
+});

tsd.json

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+{
+  "version": "v4",
+  "repo": "borisyankov/DefinitelyTyped",
+  "ref": "master",
+  "path": "typings",
+  "bundle": "typings/tsd.d.ts",
+  "installed": {
+    "chai/chai.d.ts": {
+      "commit": "f470e7569e7046c62866f57bc4fea56ba79975d5"
+    },
+    "assertion-error/assertion-error.d.ts": {
+      "commit": "f470e7569e7046c62866f57bc4fea56ba79975d5"
+    },
+    "mocha/mocha.d.ts": {
+      "commit": "f470e7569e7046c62866f57bc4fea56ba79975d5"
+    }
+  }
+}