fix(view_factory): fix caching of views

Previous implementation had bugs, and did not cache per ProtoView.

modules/angular2/test/core/compiler/view_factory_spec.js

@@ -0,0 +1,73 @@
+import {describe, ddescribe, it, iit, xit, xdescribe, expect, beforeEach, el} from 'angular2/test_lib';
+
+import {ViewFactory} from 'angular2/src/core/compiler/view_factory';
+import {AppProtoView, AppView} from 'angular2/src/core/compiler/view';
+import {dynamicChangeDetection} from 'angular2/change_detection';
+
+export function main() {
+  function createViewFactory({capacity}):ViewFactory {
+    return new ViewFactory(capacity);
+  }
+
+  function createPv() {
+    return new AppProtoView(null,
+      null,
+      dynamicChangeDetection.createProtoChangeDetector('dummy', null));
+  }
+
+  describe('RenderViewFactory', () => {
+    it('should create views', () => {
+      var pv = createPv();
+      var vf = createViewFactory({
+        capacity: 1
+      });
+      expect(vf.getView(pv) instanceof AppView).toBe(true);
+    });
+
+    describe('caching', () => {
+
+      it('should support multiple AppProtoViews', () => {
+        var capacity;
+        var pv1 = createPv();
+        var pv2 = createPv();
+        var vf = createViewFactory({ capacity: 2 });
+        var view1 = vf.getView(pv1);
+        var view2 = vf.getView(pv2);
+        vf.returnView(view1);
+        vf.returnView(view2);
+
+        expect(vf.getView(pv1)).toBe(view1);
+        expect(vf.getView(pv2)).toBe(view2);
+      });
+
+      it('should reuse the newest view that has been returned', () => {
+        var capacity;
+        var pv = createPv();
+        var vf = createViewFactory({ capacity: 2 });
+        var view1 = vf.getView(pv);
+        var view2 = vf.getView(pv);
+        vf.returnView(view1);
+        vf.returnView(view2);
+
+        expect(vf.getView(pv)).toBe(view2);
+      });
+
+      it('should not add views when the capacity has been reached', () => {
+        var capacity;
+        var pv = createPv();
+        var vf = createViewFactory({ capacity: 2 });
+        var view1 = vf.getView(pv);
+        var view2 = vf.getView(pv);
+        var view3 = vf.getView(pv);
+        vf.returnView(view1);
+        vf.returnView(view2);
+        vf.returnView(view3);
+
+        expect(vf.getView(pv)).toBe(view2);
+        expect(vf.getView(pv)).toBe(view1);
+      });
+
+    });
+
+  });
+}