feat(tests): add helper to eval a module

Needed later for unit tests for code gen and runtime code
in #3605

modules/angular2/test/compiler/eval_module_spec.ts

@@ -0,0 +1,50 @@
+import {
+  ddescribe,
+  describe,
+  xdescribe,
+  it,
+  iit,
+  xit,
+  expect,
+  beforeEach,
+  afterEach,
+  AsyncTestCompleter,
+  inject
+} from 'angular2/test_lib';
+import {PromiseWrapper} from 'angular2/src/core/facade/async';
+import {IS_DART} from '../platform';
+
+import {evalModule} from './eval_module';
+import {SourceModule} from 'angular2/src/compiler/api';
+
+// This export is used by this test code
+// when evaling the test module!
+export var TEST_VALUE = 23;
+
+export function main() {
+  describe('evalModule', () => {
+    it('should call the "run" function and allow to use imports', inject([AsyncTestCompleter], (async) => {
+         var moduleSource = IS_DART ? testDartModule : testJsModule;
+         var imports = [['angular2/test/compiler/eval_module_spec', 'testMod']];
+         
+         evalModule(moduleSource, imports, [1]).then( (value) => {
+            expect(value).toEqual([1, 23]);
+            async.done();
+          });
+       }));
+  });
+}
+
+var testDartModule = `
+  run(data) { 
+	  data.add(testMod.TEST_VALUE);
+		return data;
+	}
+`;
+
+var testJsModule = `
+  exports.run = function(data) {
+	  data.push(testMod.TEST_VALUE);
+		return data;
+	}
+`;