public void EqualityComparersIsCorrect()
{
var equalityComparers = new IEqualityComparer<object>[]
{
new DelegatingEqualityComparer<object>(),
new DelegatingEqualityComparer<object>(),
new DelegatingEqualityComparer<object>()
};
var sut = new OrEqualityComparer<object>(equalityComparers);
var actual = sut.EqualityComparers;
Assert.Equal(equalityComparers, actual);
}
public void EqualsReturnsFalseWhenAllComparersReturnsFalse()
{
// Fixture setup
var left = new object();
var right = new object();
var verify = new List<int>();
var equalityComparers = new IEqualityComparer<object>[]
{
new DelegatingEqualityComparer<object>
{
OnEquals = (x, y) =>
{
Assert.Equal(left, x);
Assert.Equal(right, y);
verify.Add(0);
return false;
}
},
new DelegatingEqualityComparer<object>
{
OnEquals = (x, y) =>
{
Assert.Equal(left, x);
Assert.Equal(right, y);
verify.Add(1);
return false;
}
}
};
var sut = new OrEqualityComparer<object>(equalityComparers);
// Exercise system
var actual = sut.Equals(left, right);
// Verify outcome
Assert.False(actual);
Assert.Equal(new[] { 0, 1 }, verify);
}
public void SutIsEqualityComparer()
{
var sut = new OrEqualityComparer<object>();
Assert.IsAssignableFrom<IEqualityComparer<object>>(sut);
}
public void GetHashCodeAlwaysReturnsZero()
{
var sut = new OrEqualityComparer<object>();
var actual = sut.GetHashCode(null);
Assert.Equal(0, actual);
}
