public void ShouldReturnTrue_WhenGivenNulls()
{
// Arrange
var sut = new MultiSetComparer <int>();
// Act
bool result = sut.Equals(null, null);
// Assert
Assert.True(result);
}
public void ShouldReturnFalse_WhenGivenCollectionAndNull()
{
// Arrange
var set0 = new int[0];
var sut = new MultiSetComparer <int>();
// Act
bool result = sut.Equals(set0, null);
// Assert
Assert.False(result);
}
public void ShouldReturnTrue_WhenGivenEmptyCollections()
{
// Arrange
var set0 = new int[0];
var set1 = new List <int>();
var sut = new MultiSetComparer <int>();
// Act
bool result = sut.Equals(set0, set1);
// Assert
Assert.True(result);
}
public void ShouldUseGivenComparerForComparisons()
{
// Arrange
var set0 = new[] { "B", "D", "g", "g", "A", "C", "E", "e", "E" };
var set1 = new[] { "b", "d", "G", "G", "A", "C", "e", "e", "e" };
var sut = new MultiSetComparer <string>(StringComparer.OrdinalIgnoreCase);
// Act
bool result = sut.Equals(set0, set1);
// Assert
Assert.True(result);
}
public void ShouldHaveSameHashCode_WhenGivenEquivalentCollectionsAccordingToGivenComparer()
{
// Arrange
var c1 = new[] { "A", "B", "C" };
var c2 = new[] { "a", "b", "c" };
var comparer = new MultiSetComparer <String>(StringComparer.OrdinalIgnoreCase);
// Act
int h1 = comparer.GetHashCode(c1);
int h2 = comparer.GetHashCode(c2);
// Assert
Assert.Equal(h1, h2);
}
/// <inheritdoc />
public bool Equals(IEnumerable <T> x, IEnumerable <T> y)
{
if (x == null)
{
return(y == null);
}
if (y == null)
{
return(false);
}
if (Object.ReferenceEquals(x, y))
{
return(true);
}
if (MultiSetComparer <T> .HaveMismatchingCounts(x, y))
{
return(false);
}
return(!HaveMismatchedElement(x, y));
}