update tests

test.js

@@ -1,41 +1,40 @@
-var expect = require('chai').expect;
-var Plugin = require('./');
+'use strict';
 
-describe('Plugin', function() {
-  var plugin;
+const expect = require('chai').expect;
+const Plugin = require('./');
 
-  beforeEach(function() {
-    plugin = new Plugin({});
+describe(Plugin.name, () => {
+  let plugin;
+
+  beforeEach(() => {
+    plugin = new Plugin({plugins: {}});
   });
 
-  it('should be an object', function() {
-    expect(plugin).to.be.ok;
+  it('should be an object', () => {
+    expect(plugin).to.be.an('object');
   });
 
-  it('should has #compile method', function() {
-    expect(plugin.compile).to.be.an.instanceof(Function);
+  it('should have #compile method', () => {
+    expect(plugin).to.respondTo('compile');
   });
 
-  it('should compile and produce valid result', function(done) {
-    var content = 'var a = 6;';
-    var expected = 'var a = 6;';
+  it('should compile and produce valid result', () => {
+    const data = 'var a = 6;';
 
-    plugin.compile({data: content, path: 'file.js'}).then(result => {
-      var data = result.data;
-      expect(data).to.equal(expected);
-      done();
-    }, error => expect(error).not.to.be.ok);
+    return plugin.compile({data}).then(result => {
+      expect(result.data).to.equal(data);
+    });
   });
 
-  it('should validate JS syntax', function(done) {
-    plugin.compile({data: 'var a =;', path: 'file.js'}).then(null, error => {
+  it('should validate JS syntax', () => {
+    return plugin.compile({data: 'var a =;'}).catch(error => {
       expect(error).to.be.an.instanceof(Error);
-      done();
     });
   });
 
-  it('should not validate JS syntax with an option', function(done) {
+  it('should not validate JS syntax with an option', () => {
     plugin = new Plugin({plugins: {javascript: {validate: false}}});
-    plugin.compile({data: 'var a =;', path: 'file.js'}).then(() => done(), error => expect(error).not.to.be.ok);
+    return plugin.compile({data: 'var a =;'});
+  });
   });
 });