public void Concatenation_Empty()
{
var element = ReFactory.NewConcatenation(Array.Empty <ReElement>());
Assert.That(element, Is.Not.Null);
Assert.That(element, Is.TypeOf(typeof(ReEmptyString)));
}
public void Concatenation_Single()
{
var child = ReUtils.NewDummy('1');
var element = ReFactory.NewConcatenation(new ReElement[] { child });
Assert.That(element, Is.SameAs(element));
}
public void Concatenation_Broken()
{
var child1 = ReUtils.NewDummy('1');
var child2 = ReUtils.NewDummy('2');
var broke = ReEmptyLanguage.Instance;
var element = ReFactory.NewConcatenation(ImmutableArray.Create(child1, broke, child2));
Assert.That(element, Is.SameAs(broke));
}
public void Concatenation_Collapse()
{
var child1 = ReUtils.NewDummy('1');
var child2 = ReUtils.NewDummy('2');
var child3 = ReUtils.NewDummy('3');
var child4 = ReUtils.NewDummy('4');
var subConcat = new ReConcatenation(ImmutableArray.Create(child2, child3));
var element = ReFactory.NewConcatenation(new ReElement[] { child1, subConcat, ReEmptyString.Instance, child4 });
Assert.That(element, Is.Not.Null);
Assert.That(element, Is.TypeOf(typeof(ReConcatenation)));
var concat = (ReConcatenation)element;
Assert.That(concat.Elements, Is.EquivalentTo(new ReElement[] { child1, child2, child3, child4 }));
}