public void LazyChildrenThrowsErrorIfLambdaReturnsNull(IMetadataObject parent)
{
// Act
var sut = new LazyChildren <IMetadataObject>(_ => null);
sut.AttachToParent(parent);
// Assert
Assert.Throws <NotSupportedException>(() => sut.GetEnumerator());
}
public void LazyChildrenForceVisitIsFalseByDefault(IList <IMetadataObject> values, IMetadataObject parent)
{
// Act
var sut = new LazyChildren <IMetadataObject>(values.ToImmutableList());
sut.AttachToParent(parent);
// Assert
Assert.That(sut.ForceVisit, Is.False);
}
public void LazyChildrenThrowsErrorWhenDeleteGetsCalledDirectly(IList <IMetadataObject> values, IMetadataObject parent)
{
// Act
var sut = new LazyChildren <IMetadataObject>(values.ToImmutableList());
sut.AttachToParent(parent);
// Assert
Assert.Throws <NotSupportedException>(() => sut.Delete(values[0]));
}
public void LazyChildrenCloneDoesNotContainDeletedValues(IList <IMetadataObject> values, IMetadataObject parent)
{
// Act
var sut = new LazyChildren <IMetadataObject>(values.ToImmutableList());
sut.AttachToParent(parent);
var clone = (LazyChildren <IMetadataObject>)sut.Clone(true, o => o, deleted: new[] { values[0] });
// Assert
clone.AttachToParent(parent);
Assert.That(clone.Count, Is.EqualTo(values.Count - 1));
Assert.That(clone, Does.Not.Contain(values[0]));
}
public void LazyChildrenCloneContainsAddedValues(IList <IMetadataObject> values, IMetadataObject parent, IMetadataObject added)
{
// Act
var sut = new LazyChildren <IMetadataObject>(values.ToImmutableList());
sut.AttachToParent(parent);
var clone = (LazyChildren <IMetadataObject>)sut.Clone(true, o => o, added: new[] { added });
// Assert
clone.AttachToParent(parent);
Assert.That(clone.Count, Is.EqualTo(values.Count + 1));
Assert.That(clone, Does.Contain(added));
}
public void LazyChildrenReturnUnchangedEntryChildrenIfProvided(IList <IMetadataObject> values, IMetadataObject parent)
{
// Act
var sut = new LazyChildren <IMetadataObject>(values.ToImmutableList());
sut.AttachToParent(parent);
// Assert
Assert.That(sut.Parent, Is.SameAs(parent));
Assert.That(sut.AreChildrenLoaded, Is.True);
Assert.That(sut.Count, Is.EqualTo(values.Count));
Assert.That(sut, Is.EquivalentTo(values));
Assert.That(sut.ForceVisit, Is.False);
}
public void LazyChildrenCloneCallsUpdateLambda(IFixture fixture, IList <IMetadataObject> values, IMetadataObject parent)
{
// Act
var sut = new LazyChildren <IMetadataObject>(values.ToImmutableList());
sut.AttachToParent(parent);
var newValues = new List <IMetadataObject>();
var clone = (LazyChildren <IMetadataObject>)sut.Clone(true, _ =>
{
var o = fixture.Create <IMetadataObject>();
newValues.Add(o);
return(o);
});
// Assert
Assert.That(clone.Parent, Is.Null);
Assert.That(clone.ForceVisit, Is.True);
clone.AttachToParent(parent);
Assert.That(clone.Count, Is.EqualTo(values.Count));
Assert.That(clone, Is.EquivalentTo(newValues));
}