Adding Angular and dependent packages for testing

third_party/pkg/angular/test/core/cache_spec.dart

+library cache_spec;
+
+import '../_specs.dart';
+
+main() => describe('CacheFactory', () {
+
+  describe('cache', () {
+    Cache<String, Object> cache;
+
+    beforeEach(() {
+      cache = new LruCache<String, Object>();
+    });
+
+
+    describe('put, get & remove', () {
+      it('should add cache entries via add and retrieve them via get', () {
+        var obj = {'bar':'baz'};
+        cache.put('key1', 'bar');
+        cache.put('key2', obj);
+
+        expect(cache.get('key2')).toBe(obj);
+        expect(cache.get('key1')).toBe('bar');
+      });
+
+
+      it('should remove entries via remove', () {
+        cache.put('k1', 'foo');
+        cache.put('k2', 'bar');
+
+        cache.remove('k2');
+
+        expect(cache.get('k1')).toBe('foo');
+        expect(cache.get('k2')).toBeNull();
+
+        cache.remove('k1');
+
+        expect(cache.get('k1')).toBeNull();
+        expect(cache.get('k2')).toBeNull();
+      });
+
+
+      it('should return null when entry does not exist', () {
+        expect(cache.remove('non-existent')).toBeNull();
+      });
+
+
+      // TODO(chirayu): to implement
+      // it('should stringify keys', () {
+      //   cache.put('123', 'foo');
+      //   cache.put(123, 'bar');
+
+      //   expect(cache.get('123')).toBe('bar');
+      //   expect(cache.info().size).toBe(1);
+
+      //   cache.remove(123);
+      //   expect(cache.info().size).toBe(0);
+      // });
+
+
+      it("should return value from put", () {
+        var obj = {};
+        expect(cache.put('k1', obj)).toBe(obj);
+      });
+    });
+
+
+    describe('put, get & remove', () {
+
+      it('should add cache entries via add and retrieve them via get', inject(() {
+        var obj = {'bar':'baz'};
+        cache.put('key1', 'bar');
+        cache.put('key2', obj);
+
+        expect(cache.get('key2')).toBe(obj);
+        expect(cache.get('key1')).toBe('bar');
+      }));
+
+
+      it('should remove entries via remove', inject(() {
+        cache.put('k1', 'foo');
+        cache.put('k2', 'bar');
+
+        cache.remove('k2');
+
+        expect(cache.get('k1')).toBe('foo');
+        expect(cache.get('k2')).toBeNull();
+
+        cache.remove('k1');
+
+        expect(cache.get('k1')).toBeNull();
+        expect(cache.get('k2')).toBeNull();
+      }));
+
+
+      it('should return null when entry does not exist', inject(() {
+        expect(cache.remove('non-existent')).toBeNull();
+      }));
+
+      it("should return value from put", inject(() {
+        var obj = {};
+        expect(cache.put('k1', obj)).toBe(obj);
+      }));
+    });
+
+
+    describe('removeAll', () {
+      it('should blow away all data', inject(() {
+        cache.put('id1', 1);
+        cache.put('id2', 2);
+        cache.put('id3', 3);
+
+        cache.removeAll();
+
+        expect(cache.get('id1')).toBeNull();
+        expect(cache.get('id2')).toBeNull();
+        expect(cache.get('id3')).toBeNull();
+      }));
+    });
+  });
+
+  // TODO(chirayu): Add a lot more tests and tests and don't rely on toString()
+  describe('LRU cache', () {
+    it('should have LRU behavior with ordering keys and eviction', inject(() {
+      var cache = new LruCache<int, int>(capacity: 4);
+      cache.put(1, 10);
+      cache.put(2, 20);
+      cache.put(3, 30);
+      cache.put(4, 40);
+      expect(cache.get(2)).toEqual(20);
+      cache.put(5, 50);
+      cache.put(6, 60);
+      expect(cache.get(5)).toEqual(50);
+      cache.put(7, 70);
+      cache.put(8, 80);
+      // 1 has been evicted.
+      expect(cache.get(1)).toBeNull();
+      // The order of items is LRU to MRU.
+      expect("$cache").toEqual(
+          r"[LruCache<int, int>: capacity=4, size=4, items={6: 60, 5: 50, 7: 70, 8: 80}]");
+      cache.removeAll();
+      expect("$cache").toEqual(r"[LruCache<int, int>: capacity=4, size=0, items={}]");
+
+      var stats = cache.stats();
+      expect(stats.capacity).toEqual(4);
+      expect(stats.size).toEqual(0);
+      expect(stats.hits).toEqual(2);
+      expect(stats.misses).toEqual(1);
+    }));
+  });
+});