feat(tests): Added initial unit tests for loader

.gitignore

@@ -1,2 +1,2 @@
 node_modules
-
+npm-debug.log

spec/index.spec.js

@@ -0,0 +1,60 @@
+var should = require('should');
+var loader = require('../src/index');
+
+function checkResult(loaded, result) {
+  return loaded.should.eql(result.join(''));
+}
+
+describe('Loader', function() {
+  var resourcePath = 'path/to/routes.ts';
+  var modulePath = './path/to/file.module#FileModule';
+  var query = '';
+
+  it('should return a loadChildren async require statement', function() {
+    var loadedString = loader.call({
+      resourcePath: resourcePath,
+      query: query
+    }, `loadChildren: '${modulePath}'`);
+
+    var result = [
+      'loadChildren: () => new Promise(function (resolve) {\n',
+      '  (require as any).ensure([], function (require) {\n',
+      '    resolve(require(\'./path/to/file.module\')[\'FileModule\']);\n',
+      '  });\n',
+      '})'
+    ];
+
+    checkResult(loadedString, result);
+  });
+
+  it('should return a loadChildren sync require statement', function() {
+    var loadedString = loader.call({
+      resourcePath: resourcePath,
+      query: query
+    }, `loadChildren: '${modulePath}?sync=true'`);
+
+    var result = [
+      'loadChildren: function() {\n',
+      '  return require(\'./path/to/file.module\')[\'FileModule\'];\n',
+      '}'
+    ];
+
+    checkResult(loadedString, result);
+  });
+
+  it ('should return a loadChildren System.import statement', function() {
+    var loadedString = loader.call({
+      resourcePath: resourcePath,
+      query: '?loader=system'
+    }, `loadChildren: '${modulePath}'`);
+
+    var result = [
+      'loadChildren: () => System.import(\'./path/to/file.module\')\n',
+      '  .then(function(module) {\n',
+      '    return module[\'FileModule\'];\n',
+      '  })'
+    ];
+
+    checkResult(loadedString, result);
+  });
+});