public void From_NoEqualityAndCustomHash_DefaultEqualityUsed()
{
var comparer = EqualityComparer.From <bool>(null, b => 3);
bool result = comparer.Equals(true, true);
Assert.True(result);
}
public void From_NoEqualityAndCustomHash_HashUsed()
{
var comparer = EqualityComparer.From <bool>(null, b => 3);
int result = comparer.GetHashCode(true);
Assert.Equal(3, result);
}
public void From_EqualityAndNoHash_DefaultHashImpl()
{
var comparer = EqualityComparer.From <bool>((b, b1) => true);
int result = comparer.GetHashCode(true);
Assert.Equal(1, result);
}
public void From_EqualityAndNoHash_EqualityUsed()
{
var comparer = EqualityComparer.From <string>((s1, s2) => s1[0] == s2[0]);
bool result = comparer.Equals("abc", "aa");
Assert.True(result);
}
public void From_BothEqualityAndHash_CustomHashUsed()
{
Func <bool, bool, bool> equality = (b1, b2) => true;
Func <bool, int> hash = b => 3;
var comparer = EqualityComparer.From(equality, hash);
int hashResult = comparer.GetHashCode(true);
Assert.Equal(3, hashResult);
}
public void From_BothEqualityAndHash_CustomEqualityUsed()
{
Func <bool, bool, bool> equality = (b1, b2) => b1 != b2;
Func <bool, int> hash = b => 3;
var comparer = EqualityComparer.From(equality, hash);
bool equalityResult = comparer.Equals(true, false);
Assert.True(equalityResult);
}
public void From_NoParams_DefaultComparer()
{
IEqualityComparer <int> comparer = EqualityComparer.From <int>();
Assert.Same(EqualityComparer <int> .Default, comparer);
}