public void ClearAllClearsAllCache() { // Arrange var cache = new MemoryCacheProvider(this.fixture.AppConfiguration.TerminologySqlSettings); const string Key1 = "key1"; const string Key2 = "key2"; const string Key3 = "key3"; var obj1 = new TestObject { Text = "Test1", Stamp = DateTime.Now }; var obj2 = new TestObject { Text = "Test2", Stamp = DateTime.Now }; var obj3 = new TestObject { Text = "Test3", Stamp = DateTime.Now }; cache.GetItem(Key1, () => obj1); cache.GetItem(Key2, () => obj2); cache.GetItem(Key3, () => obj3); cache.GetItem(Key1).Should().NotBeNull(); cache.GetItem(Key2).Should().NotBeNull(); cache.GetItem(Key3).Should().NotBeNull(); var instanceKey = cache.InstanceKey; // Act cache.ClearAll(); // Assert cache.GetItem(Key1).Should().BeNull(); cache.GetItem(Key2).Should().BeNull(); cache.GetItem(Key3).Should().BeNull(); instanceKey.Should().NotBe(cache.InstanceKey); }