public void Hamming_distance_throws_exception_if_input_string__is_null()
{
var hamming = new Hamming();
Assert.ThrowsException <ArgumentNullException>(() => hamming.CalculateDistance("test", null));
Assert.ThrowsException <ArgumentNullException>(() => hamming.CalculateDistance(null, "test"));
Assert.ThrowsException <ArgumentNullException>(() => hamming.CalculateDistance(null, null));
}
public void Hamming_distance_calculation_if_strings_are_different()
{
var hamming = new Hamming();
Assert.AreEqual(1, hamming.CalculateDistance("test1", "test2"));
Assert.AreEqual(2, hamming.CalculateDistance("test", "tset"));
Assert.AreEqual(3, hamming.CalculateDistance("test", "tste"));
Assert.AreEqual(4, hamming.CalculateDistance("test", "etts"));
}
public void Hamming_distance_throws_exception_if_length_of_strings_are_different()
{
var hamming = new Hamming();
Assert.ThrowsException <ArgumentException>(() => hamming.CalculateDistance("test", ""));
Assert.ThrowsException <ArgumentException>(() => hamming.CalculateDistance("", "test"));
Assert.ThrowsException <ArgumentException>(() => hamming.CalculateDistance("test", "tes"));
Assert.ThrowsException <ArgumentException>(() => hamming.CalculateDistance("tes", "test"));
}
public void Hamming_distance_calculation_with_specified_equality_comparer()
{
var equalityComparer = new Mock <IEqualityComparer <char> >(MockBehavior.Strict);
equalityComparer.Setup(t => t.Equals('t', 't')).Returns(true);
equalityComparer.Setup(t => t.Equals('e', 'e')).Returns(false);
equalityComparer.Setup(t => t.Equals('s', 's')).Returns(false);
var hamming = new Hamming(equalityComparer.Object);
Assert.AreEqual(2, hamming.CalculateDistance("test", "test"));
}
public void Hamming_distance_is_zero_if_the_two_string_are_equal()
{
var hamming = new Hamming();
Assert.AreEqual(0, hamming.CalculateDistance("test", "test"));
}