Use sinon-chai for extra readability

Author: simonsmith

package.json

@@ -39,6 +39,7 @@
     "postcss-property-lookup": "^1.1.4",
     "rewire": "^2.5.1",
     "sinon": "^1.17.2",
+    "sinon-chai": "^2.8.0",
     "stylelint-config-suitcss": "^1.0.0"
   },
   "scripts": {

test/test.js

@@ -1,11 +1,15 @@
-var expect = require('chai').expect;
+var chai = require('chai');
 var sinon = require('sinon');
 var child = require('child_process');
 var exec = child.exec;
 var fs = require('fs');
 var rewire = require('rewire');
 var suitcss = rewire('../lib');
 var path = require('path');
+var sinonChai = require('sinon-chai');
+
+chai.use(sinonChai);
+var expect = chai.expect;
 
 /**
  * Node API tests.
@@ -182,9 +186,9 @@ describe('suitcss', function() {
           beforeLint: beforeLintStub
         }).catch(done);
 
-        expect(lintImportedFilesStub.calledOnce).to.be.true;
-        expect(beforeLintStub.calledOnce).to.be.true;
-        expect(beforeLintStub.calledBefore(lintImportedFilesStub)).to.be.true;
+        expect(lintImportedFilesStub).to.be.called.once;
+        expect(beforeLintStub).to.be.called.once;
+        expect(beforeLintStub).to.have.been.calledBefore(lintImportedFilesStub);
 
         done();
       });