test(express): cover Express middleware schema creation with tests

package.json

@@ -19,10 +19,13 @@
   "homepage": "https://github.com/RisingStack/graffiti#readme",
   "devDependencies": {
     "chai": "^3.2.0",
+    "chai-subset": "^1.0.1",
     "eslint": "1.0.0-rc-3",
     "express": "^4.13.1",
     "mocha": "^2.2.5",
-    "pre-commit": "^1.0.10"
+    "pre-commit": "^1.0.10",
+    "sinon": "^1.15.4",
+    "sinon-chai": "^2.8.0"
   },
   "pre-commit": [
     "eslint",

src/express/index.spec.js

@@ -35,7 +35,23 @@ describe('graffiti express', function() {
     });
   });
 
-  it('creates the schema');
+  it('creates the schema', function() {
+
+    var getSchemaSpy = this.sandbox.spy();
+    var models = [{
+      name: 'User'
+    }];
+
+    var mw = express({
+      prefix: '/graphql',
+      models: models,
+      adapter: {
+        getSchema: getSchemaSpy
+      }
+    });
+
+    expect(getSchemaSpy).to.be.calledWith(models);
+  });
 
   describe('requested url starts with prefix', function() {
 

src/test-setup.spec.js

@@ -0,0 +1,17 @@
+var sinon = require('sinon');
+var chai = require('chai');
+var sinonChai = require('sinon-chai');
+var chaiSubset = require('chai-subset');
+
+before(function() {
+  chai.use(chaiSubset);
+  chai.use(sinonChai);
+});
+
+beforeEach(function() {
+  this.sandbox = sinon.sandbox.create();
+});
+
+afterEach(function() {
+  this.sandbox.restore();
+});