public void GetHashCode_ForAllUniqueObject_AUniqueHashCodeIsReturned() { var hashCodes = new Dictionary<int, SystemStorageInformation>(); for (var i = 0; i < 10000; i++) { // Act var object1 = new SystemStorageInformation { StorageDeviceInfos = new[] { new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = i } } }; int generatedHashCode = object1.GetHashCode(); // Assert Assert.IsFalse(hashCodes.ContainsKey(generatedHashCode)); hashCodes.Add(generatedHashCode, object1); } }
public void GetHashCode_TwoIdenticalObjects_BothUninitialized_HashCodesAreEqual() { // Arrange var package1 = new SystemStorageInformation(); var package2 = new SystemStorageInformation(); // Act int hashCodeObject1 = package1.GetHashCode(); int hashCodeObject2 = package2.GetHashCode(); // Assert Assert.AreEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_TwoDistinctObjects_HashCodesAreDifferent() { // Arrange var object1 = new SystemStorageInformation { StorageDeviceInfos = new[] { new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = 50.0d } } }; var object2 = new SystemStorageInformation { StorageDeviceInfos = new[] { new SystemStorageDeviceInformation { DeviceName = "D:", FreeDiscSpaceInPercent = 50.0d } } }; // Act int hashCodeObject1 = object1.GetHashCode(); int hashCodeObject2 = object2.GetHashCode(); // Assert Assert.AreNotEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_TwoIdenticalObjects_BothInitialized_HashCodesAreEqual() { // Arrange var object1 = new SystemStorageInformation { StorageDeviceInfos = new[] { new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = 50.0d } } }; var object2 = new SystemStorageInformation { StorageDeviceInfos = new[] { new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = 50.0d } } }; // Act int hashCodeObject1 = object1.GetHashCode(); int hashCodeObject2 = object2.GetHashCode(); // Assert Assert.AreEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_SameHashCodeIsReturnedEveryTimeTheMethodIsCalled_AsLongAsTheObjectDoesNotChange() { // Arrange var device1 = new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = 50.0d }; var object1 = new SystemStorageInformation { StorageDeviceInfos = new[] { device1 } }; int expectedHashcode = object1.GetHashCode(); for (var i = 0; i < 100; i++) { // Act object1.StorageDeviceInfos = new[] { device1 }; int generatedHashCode = object1.GetHashCode(); // Assert Assert.AreEqual(expectedHashcode, generatedHashCode); } }