Пример #1
0
        /// <summary>
        /// Helper for testing empty dictionary
        /// </summary>
        /// <typeparam name="TKey">type of dictionary key</typeparam>
        /// <typeparam name="TValue">type of dictionary value</typeparam>
        private static void TestEmptyDictionaty <TKey, TValue>()
        {
            // Singleton test
            var instance1 = Empty.GetDictionary <TKey, TValue>();

            Assert.IsNotNull(instance1);
            var instance2 = Empty.GetDictionary <TKey, TValue>();

            Assert.IsNotNull(instance2);
            Assert.IsTrue(object.ReferenceEquals(instance1, instance2));

            // Count
            Assert.AreEqual(0, instance1.Count);

            // enumerator
            var hasValue = false;

            foreach (var pair in instance1)
            {
                hasValue = true;
            }

            Assert.IsFalse(hasValue);

            // cast test
            Assert.IsNull(instance1 as IDictionary <TKey, TValue>);
        }