public void GetHashCode_TwoIdenticalObjects_BothUninitialized_HashCodesAreEqual() { // Arrange var package1 = new SystemMemoryInformation(); var package2 = new SystemMemoryInformation(); // Act int hashCodeObject1 = package1.GetHashCode(); int hashCodeObject2 = package2.GetHashCode(); // Assert Assert.AreEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_TwoIdenticalObjects_BothInitialized_HashCodesAreEqual() { // Arrange var object1 = new SystemMemoryInformation { AvailableMemoryInGB = 8.0d, UsedMemoryInGB = 3.0d }; var object2 = new SystemMemoryInformation { AvailableMemoryInGB = 8.0d, UsedMemoryInGB = 3.0d }; // Act int hashCodeObject1 = object1.GetHashCode(); int hashCodeObject2 = object2.GetHashCode(); // Assert Assert.AreEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_SameHashCodeIsReturnedEveryTimeTheMethodIsCalled_AsLongAsTheObjectDoesNotChange() { // Arrange var availableMemoryInGB = 8.0d; var usedMemoryInGB = 3.0d; var object1 = new SystemMemoryInformation { AvailableMemoryInGB = availableMemoryInGB, UsedMemoryInGB = usedMemoryInGB }; int expectedHashcode = object1.GetHashCode(); for (var i = 0; i < 100; i++) { // Act object1.AvailableMemoryInGB = availableMemoryInGB; object1.UsedMemoryInGB = usedMemoryInGB; int generatedHashCode = object1.GetHashCode(); // Assert Assert.AreEqual(expectedHashcode, generatedHashCode); } }
public void GetHashCode_TwoDistinctObjects_HashCodesAreDifferent() { // Arrange var object1 = new SystemMemoryInformation { AvailableMemoryInGB = 8.0d, UsedMemoryInGB = 3.0d }; var object2 = new SystemMemoryInformation { AvailableMemoryInGB = 16.0d, UsedMemoryInGB = 7.0d }; // Act int hashCodeObject1 = object1.GetHashCode(); int hashCodeObject2 = object2.GetHashCode(); // Assert Assert.AreNotEqual(hashCodeObject1, hashCodeObject2); }
public void GetHashCode_ForAllUniqueObject_AUniqueHashCodeIsReturned() { var hashCodes = new Dictionary<int, SystemMemoryInformation>(); for (var i = 0; i < 1000; i++) { // Act var object1 = new SystemMemoryInformation { AvailableMemoryInGB = i, UsedMemoryInGB = i / 2.0d }; int generatedHashCode = object1.GetHashCode(); // Assert Assert.IsFalse(hashCodes.ContainsKey(generatedHashCode)); hashCodes.Add(generatedHashCode, object1); } }