public void GetHashCode_SameHashCodeIsReturnedEveryTimeTheMethodIsCalled_AsLongAsTheObjectDoesNotChange() { // Arrange var deviceName = "C:"; var freeDiscSpaceInPercent = 30.0d; var object1 = new SystemStorageDeviceInformation { DeviceName = deviceName, FreeDiscSpaceInPercent = freeDiscSpaceInPercent }; int expectedHashcode = object1.GetHashCode(); for (var i = 0; i < 100; i++) { // Act object1.DeviceName = deviceName; object1.FreeDiscSpaceInPercent = freeDiscSpaceInPercent; int generatedHashCode = object1.GetHashCode(); // Assert Assert.AreEqual(expectedHashcode, generatedHashCode); } }
public void GetHashCode_TwoIdenticalObjects_BothUninitialized_HashCodesAreEqual() { // Arrange var package1 = new SystemStorageDeviceInformation(); var package2 = new SystemStorageDeviceInformation(); // Act int hashCodeObject1 = package1.GetHashCode(); int hashCodeObject2 = package2.GetHashCode(); // Assert Assert.AreEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_TwoDistinctObjects_HashCodesAreDifferent() { // Arrange var object1 = new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = 30.0d }; var object2 = new SystemStorageDeviceInformation { DeviceName = "E:", FreeDiscSpaceInPercent = 10.0d }; // Act int hashCodeObject1 = object1.GetHashCode(); int hashCodeObject2 = object2.GetHashCode(); // Assert Assert.AreNotEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_TwoIdenticalObjects_BothInitialized_HashCodesAreEqual() { // Arrange var object1 = new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = 30.0d }; var object2 = new SystemStorageDeviceInformation { DeviceName = "C:", FreeDiscSpaceInPercent = 30.0d }; // Act int hashCodeObject1 = object1.GetHashCode(); int hashCodeObject2 = object2.GetHashCode(); // Assert Assert.AreEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_ForAllUniqueObject_AUniqueHashCodeIsReturned() { var hashCodes = new Dictionary <int, SystemStorageDeviceInformation>(); for (var i = 0; i < 1000; i++) { // Act var object1 = new SystemStorageDeviceInformation { DeviceName = i.ToString(), FreeDiscSpaceInPercent = i }; int generatedHashCode = object1.GetHashCode(); // Assert Assert.IsFalse(hashCodes.ContainsKey(generatedHashCode)); hashCodes.Add(generatedHashCode, object1); } }