public void UnsequenceEqual_CustomComparerNotEquals_False(int[] first, int[] second)
{
// Arrange
var comparer = ComparerFactory.CreateEqualityComparer((x, y) => x == y, (int x) => x.GetHashCode());
// Act
var result = first.UnsequenceEqual(second, comparer);
// Assert
Assert.That(result, Is.False);
}
public void EqualityComparer_CustomEqualityComparer_Equal()
{
// Arrange
var customEqualityComparer = ComparerFactory.CreateEqualityComparer <int>((i, j) => i == j, i => i);
var collection = GetEmptyExtensible(customEqualityComparer);
// Act
var equalityComparer = collection.EqualityComparer;
// Assert
Assert.That(equalityComparer, Is.SameAs(customEqualityComparer));
}
public void Constructor_EqualityComparer_EqualsGivenEqualityComparer()
{
// Arrange
var customEqualityComparer = ComparerFactory.CreateEqualityComparer <int>((i, j) => i == j, i => i);
// Act
var list = new ArrayList <int>(equalityComparer: customEqualityComparer);
var equalityComparer = list.EqualityComparer;
// Assert
Assert.That(equalityComparer, Is.SameAs(customEqualityComparer));
}
public void UnsequenceEqual_EqualHashCodesNotEquals_False(int[] first, int[] second)
{
// Arrange
Func <int, int, bool> equals = (x, y) => x == y;
Func <int, int> getEqualHashCode = x => 0;
var comparer = ComparerFactory.CreateEqualityComparer(equals, getEqualHashCode);
// Act
var result = first.UnsequenceEqual(second, comparer);
// Assert
Assert.That(result, Is.False);
}
public void UnsequenceEqual_IntialComparer_True(string[] first, string[] second, bool expectedResult)
{
// Arrange
Func <string, string> firstLetterOrEmpty = s => string.IsNullOrEmpty(s) ? string.Empty : s.Substring(0, 1);
Func <string, string, bool> equals = (x, y) => firstLetterOrEmpty(x).Equals(firstLetterOrEmpty(y));
Func <string, int> getHashCode = x => firstLetterOrEmpty(x).GetHashCode();
var comparer = ComparerFactory.CreateEqualityComparer(equals, getHashCode);
// Act
var result = first.UnsequenceEqual(second, comparer);
// Assert
Assert.That(result, Is.EqualTo(expectedResult));
}
public static SCG.IEqualityComparer <KeyValuePair <TKey, TValue> > KeyEqualityComparer <TKey, TValue>() => ComparerFactory.CreateEqualityComparer <KeyValuePair <TKey, TValue> >((x, y) => x.Key.Equals(y.Key), x => x.Key.GetHashCode());
public static SCG.IEqualityComparer <T> CreateStructComparer <T>() => ComparerFactory.CreateEqualityComparer <T>(StructEquals, type => type.GetHashCode());