public void SameHashShouldResultIn100PercentSimilarityTest()
{
// arrange
var hash = new byte[] { 255, 255, 255, 255, 255, 255, 255, 255 };
// act
var result = Sut.Similarity(hash, hash);
// assert
result.Should().Be(100);
}
public void OneBitDifferenceShouldResultInAlmost99PercentSimilarityTest()
{
// arrange
var hash1 = new byte[] { 255, 255, 255, 255, 255, 255, 255, 255 };
var hash2 = new byte[] { 255, 255, 255, 255, 255, 255, 255, 254 };
// act
var result = Sut.Similarity(hash1, hash2);
// assert
result.Should().Be(98.4375);
}
public void NullArgumentShouldThrowArgumentNullExceptionTest(bool hash1IsNull, bool hash2IsNull)
{
// arrange
var hash1 = hash1IsNull ? null : new byte[ValidHashSize];
var hash2 = hash2IsNull ? null : new byte[ValidHashSize];
// act
Action act = () => Sut.Similarity(hash1, hash2);
// assert
act.Should().Throw <ArgumentNullException>();
}
public void SimilarityThrowsExceptionOnWrongInputSizeArgument(int size)
{
Assert.Throws <ArgumentOutOfRangeException>(() => Sut.Similarity(new byte[size], new byte[ValidHashSize]));
Assert.Throws <ArgumentOutOfRangeException>(() => Sut.Similarity(new byte[ValidHashSize], new byte[size]));
}
