public void GetHashCode_SameHashCodeIsReturnedEveryTimeTheMethodIsCalled_AsLongAsTheObjectDoesNotChange()
{
// Arrange
var processorUtilizationInPercent = 50.0d;
var object1 = new ProcessorUtilizationInformation {
ProcessorUtilizationInPercent = processorUtilizationInPercent
};
int expectedHashcode = object1.GetHashCode();
for (var i = 0; i < 100; i++)
{
// Act
object1.ProcessorUtilizationInPercent = processorUtilizationInPercent;
int generatedHashCode = object1.GetHashCode();
// Assert
Assert.AreEqual(expectedHashcode, generatedHashCode);
}
}
public void GetHashCode_TwoIdenticalObjects_BothUninitialized_HashCodesAreEqual()
{
// Arrange
var package1 = new ProcessorUtilizationInformation();
var package2 = new ProcessorUtilizationInformation();
// Act
int hashCodeObject1 = package1.GetHashCode();
int hashCodeObject2 = package2.GetHashCode();
// Assert
Assert.AreEqual(hashCodeObject1, hashCodeObject2);
}
public void GetHashCode_TwoDistinctObjects_HashCodesAreDifferent()
{
// Arrange
var object1 = new ProcessorUtilizationInformation {
ProcessorUtilizationInPercent = 90.0d
};
var object2 = new ProcessorUtilizationInformation {
ProcessorUtilizationInPercent = 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 ProcessorUtilizationInformation {
ProcessorUtilizationInPercent = 50.0d
};
var object2 = new ProcessorUtilizationInformation {
ProcessorUtilizationInPercent = 50.0d
};
// Act
int hashCodeObject1 = object1.GetHashCode();
int hashCodeObject2 = object2.GetHashCode();
// Assert
Assert.AreEqual(hashCodeObject1, hashCodeObject2);
}
public void GetHashCode_ForAllUniqueObject_AUniqueHashCodeIsReturned()
{
var hashCodes = new Dictionary <int, ProcessorUtilizationInformation>();
for (var i = 0; i < 100; i++)
{
// Act
var object1 = new ProcessorUtilizationInformation {
ProcessorUtilizationInPercent = i
};
int generatedHashCode = object1.GetHashCode();
// Assert
Assert.IsFalse(hashCodes.ContainsKey(generatedHashCode));
hashCodes.Add(generatedHashCode, object1);
}
}