public void Non_equal_value_objects_have_different_hash_codes()
{
var a = new FakeValueObject(1, "a", true);
var b = new FakeValueObject(2, "a", true);
Assert.AreNotEqual(a.GetHashCode(), b.GetHashCode());
}
public void GetHashCode_SingleValue_ThisValueHashCodeReturned()
{
string singleValue = "abcd";
FakeValueObject obj = new FakeValueObject(singleValue);
Assert.AreEqual(singleValue.GetHashCode(), obj.GetHashCode());
}
public void Equal_value_objects_have_the_same_hash_code()
{
var first = new FakeValueObject(1, "first", true);
var second = new FakeValueObject(1, "first", true);
first.GetHashCode().Should().Be(second.GetHashCode());
}
public void GetHashCode_should_return_same(string str, int number, DateTime datetime, bool boolean)
{
// arrange
var obj1 = new FakeValueObject
{
StringValue = str,
IntValue = number,
DateTimeValue = datetime,
BooleanValue = boolean
};
var obj2 = new FakeValueObject
{
StringValue = str,
IntValue = number,
DateTimeValue = datetime,
BooleanValue = boolean
};
// Actions
var hash1 = obj1.GetHashCode();
var hash2 = obj2.GetHashCode();
// Assertion
hash1.Should().Be(hash2);
}
public void GetHashCode_SingleValue_ThisValueHashCodeReturned()
{
string singleValue = "abcd";
FakeValueObject obj = new FakeValueObject(singleValue);
Assert.Equal(singleValue.GetHashCode(), obj.GetHashCode());
}
public void GetHashCode_TwoValues_XorOfHashCodesReturned()
{
string firstValue = "abcd";
int secodValue = 15;
FakeValueObject obj = new FakeValueObject(firstValue, secodValue);
Assert.AreEqual(firstValue.GetHashCode() ^ secodValue.GetHashCode(), obj.GetHashCode());
}
public void GetHashCode_TwoValues_XorOfHashCodesReturned()
{
string firstValue = "abcd";
int secodValue = 15;
FakeValueObject obj = new FakeValueObject(firstValue, secodValue);
Assert.Equal((firstValue.GetHashCode() * 1) ^ (secodValue.GetHashCode() * 2), obj.GetHashCode());
}
public void SimilarValueObjectsShouldNotHaveSameHashCode()
{
// Arrange
var valueObject1 = new FakeValueObject()
{
A = 5, B = "Hello"
};
var valueObject2 = new FakeValueObject()
{
A = 6, B = "World"
};
// Act
var sameHashCode = valueObject1.GetHashCode() == valueObject2.GetHashCode();
// Assert
sameHashCode.Should().BeFalse();
}
public void GetHashCode_NullValue_ZeroReturned()
{
var obj = new FakeValueObject(new object[] { null });
Assert.AreEqual(0, obj.GetHashCode());
}
public void GetHashCode_TwoValues_XorOfHashCodesReturned()
{
const string firstValue = "abcd";
const int secodValue = 15;
var obj = new FakeValueObject(firstValue, secodValue);
Assert.AreEqual(firstValue.GetHashCode() ^ secodValue.GetHashCode(), obj.GetHashCode());
}
public void GetHashCode_NullValue_ZeroReturned()
{
FakeValueObject obj = new FakeValueObject(new object[] { null });
Assert.AreEqual(0, obj.GetHashCode());
}