public void Detects_cycle_handles_equality_by_value()
{
var one = new SelfSealed {
Value = 1
};
one.Second = new SelfSealed {
First = one,
Value = 1
};
/*
* 1-1
* / \
* N 2-1
* cycle: / \
* 1-1 N
* / \
* N 2-1
*/
var other = new SelfSealed {
Second = new SelfSealed {
First = new SelfSealed {
Second = new SelfSealed {
Value = 0
},
Value = 4
},
Value = 4
},
Value = 3
};
/*
* 3-3
* / \
* N 4-4
* / \
* 5-4 N
* / \
* N 6-6
*/
var expected = SelfSealed.Comparer.Compare(one, other);
var actual = ComparerSelfSealed.Compare(one, other);
using (new AssertionScope()) {
expected.Should().Be(-1);
actual.Should().Be(expected);
}
}
public void Detects_cycle_handles_equalty_by_value()
{
var one = new SelfSealed {
Value = 1
};
one.Second = new SelfSealed {
First = one,
Value = 1
};
/*
* 1-1
* / \
* N 2-1
* cycle: / \
* 1-1 N
* / \
* N 2-1
*/
var other = new SelfSealed {
Second = new SelfSealed {
First = new SelfSealed {
Second = new SelfSealed {
Value = 0
},
Value = 4
},
Value = 4
},
Value = 3
};
/*
* 3-3
* / \
* N 4-4
* / \
* 5-4 N
* / \
* N 6-6
*/
using (new AssertionScope()) {
ComparerSelfSealed.GetHashCode(one).Should().Be(-2015758974);
ComparerSelfSealed.GetHashCode(other).Should().Be(-1064642813);
ComparerSelfSealed.Equals(one, other).Should().BeFalse();
}
}
public void No_cycle_when_identical_objects_in_collection()
{
var one = new SelfSealed {
Value = 1
};
one.Second = new SelfSealed {
First = one,
Value = 1
};
var two = new SelfSealed {
Value = 1
};
two.Second = new SelfSealed {
First = two,
Value = 1
};
var x = new[] {
one,
one,
one
};
var other = new SelfSealed {
Second = new SelfSealed {
First = new SelfSealed {
Value = 4
},
Value = 4
},
Value = 3
};
var y = new[] {
two,
two,
other
};
var expected = SelfSealed.Comparer.Compare(x, y);
var comparer = new ComparerBuilder()
.For <SelfSealed>(c => c.IgnoreMember(o => o.Id))
.GetComparer <SelfSealed[]>();
var actual = comparer.Compare(x, y);
using (new AssertionScope()) {
expected.Should().Be(-1);
actual.Should().Be(-1);
}
}
public void Detects_cycle_on_second_member()
{
var one = new SelfSealed {
Value = 1
};
one.Second = new SelfSealed {
First = one,
Value = 2
};
/*
* 1
* / \
* N 2
* cycle: / \
* 1 N
* / \
* N 2
*/
var other = new SelfSealed {
Second = new SelfSealed {
First = new SelfSealed {
Value = 3
},
Value = 4
},
Value = 5
};
/*
* 3
* / \
* N 4
* / \
* 5 N
* / \
* N N difference here: 2 > N
*/
var expected = SelfSealed.Comparer.Compare(one, other);
var actual = ComparerSelfSealed.Compare(one, other);
using (new AssertionScope()) {
expected.Should().Be(1);
actual.Should().Be(expected);
}
}
public void Cross_reference_should_fail()
{
var x = new SelfSealed();
var y = new SelfSealed {
First = x,
Second = x
};
x.First = y;
x.Second = y;
using (new AssertionScope()) {
ComparerSelfSealed.Equals(x, y).Should().BeTrue();
ComparerSelfSealed.GetHashCode(x).Should().Be(ComparerSelfSealed.GetHashCode(y));
}
}
public void No_cycle_when_identical_objects_in_collection()
{
var one = new SelfSealed {
Value = 1
};
one.Second = new SelfSealed {
First = one,
Value = 1
};
var two = new SelfSealed {
Value = 1
};
two.Second = new SelfSealed {
First = two,
Value = 1
};
var x = new[] {
one,
one,
one
};
var other = new SelfSealed {
Second = new SelfSealed {
First = new SelfSealed {
Value = 4
},
Value = 4
},
Value = 3
};
var y = new[] {
two,
two,
other
};
var comparer = new ComparerBuilder().For <SelfSealed>().GetEqualityComparer <SelfSealed[]>();
using (new AssertionScope()) {
comparer.Equals(x, y).Should().BeFalse();
comparer.GetHashCode(x).Should().Be(271135911);
comparer.GetHashCode(y).Should().Be(194708355);
}
}
public void Detects_cycle_on_second_member()
{
var one = new SelfSealed {
Value = 1
};
one.Second = new SelfSealed {
First = one,
Value = 2
};
/*
* 1
* / \
* N 2
* cycle: / \
* 1 N
* / \
* N 2
*/
var other = new SelfSealed {
Second = new SelfSealed {
First = new SelfSealed {
Value = 3
},
Value = 4
},
Value = 5
};
/*
* 3
* / \
* N 4
* / \
* 5 N
* / \
* N N difference here: 2 > N
*/
using (new AssertionScope()) {
ComparerSelfSealed.GetHashCode(one).Should().Be(-2015759071);
ComparerSelfSealed.GetHashCode(other).Should().Be(-1670556025);
ComparerSelfSealed.Equals(one, other).Should().BeFalse();
}
}
public void Object_with_bigger_cycle_is_bigger()
{
var one = new SelfSealed();
one.First = new SelfSealed {
First = new SelfSealed {
First = one
}
};
var other = new SelfSealed {
First = one
};
var expected = SelfSealed.Comparer.Compare(one, other);
var actual = ComparerSelfSealed.Compare(one, other);
actual.Should().Be(expected);
}
public void Cross_reference_should_not_fail()
{
var other = new SelfSealed();
var one = new SelfSealed {
First = other,
Second = other
};
other.First = one;
other.Second = one;
var expected = SelfSealed.Comparer.Compare(one, other);
var actual = ComparerSelfSealed.Compare(one, other);
using (new AssertionScope()) {
expected.Should().Be(0);
actual.Should().Be(expected);
}
}
public void Object_with_bigger_cycle_is_bigger()
{
var one = new SelfSealed();
one.First = new SelfSealed {
First = new SelfSealed {
First = one
}
};
var other = new SelfSealed {
First = one
};
using (new AssertionScope()) {
ComparerSelfSealed.GetHashCode(one).Should().Be(1342073958);
ComparerSelfSealed.GetHashCode(other).Should().Be(-826099324);
ComparerSelfSealed.Equals(one, other).Should().BeFalse();
}
}