public void ReturnsFalseWhenAResolvableConstructorDoesNotExist()
{
var sut = new ResolverConstructorSelector();
ConstructorInfo dummy;
Assert.That(sut.TryGetConstructor(typeof(Class1), MockResolver.Object, out dummy), Is.False);
}
public void ReturnsTrueWhenAResolvableConstructorExists()
{
var sut = new ResolverConstructorSelector();
ConstructorInfo dummy;
Assert.That(sut.TryGetConstructor(typeof(Class5), MockResolver.Object, out dummy), Is.True);
}
public void ReturnsFalseIfTheTypeIsAbstract(Type abstractType)
{
var sut = new ResolverConstructorSelector();
ConstructorInfo ctor;
var result = sut.TryGetConstructor(abstractType, MockResolver.Object, out ctor);
Assert.That(result, Is.False);
}
public void SetsTheOutParameterToNullWhenNoResolvableConstructorExists()
{
var sut = new ResolverConstructorSelector();
ConstructorInfo ctor;
sut.TryGetConstructor(typeof(Class1), MockResolver.Object, out ctor);
Assert.That(ctor, Is.Null);
}
public void ChoosesTheResolvableConstructorWithTheMostParameters()
{
SetResolvable(typeof(IInterface1));
SetResolvable(typeof(IInterface2));
SetResolvable(typeof(IInterface3));
var sut = new ResolverConstructorSelector();
var ctor = sut.GetConstructor(typeof(Class2), MockResolver.Object);
Assert.That(ctor.GetParameters().Length, Is.EqualTo(2));
}
public void ChoosesTheResolvableConstructorWhenThereAreMoreThanOnceResolvableConstructorsAndOnlyOneIsResolvable()
{
SetResolvable(typeof(IInterface1));
SetResolvable(typeof(IInterface2));
var sut = new ResolverConstructorSelector();
ConstructorInfo ctor;
sut.TryGetConstructor(typeof(Class1), MockResolver.Object, out ctor);
Assert.That(ctor.GetParameters().All(p => MockResolver.Object.CanGet(p.ParameterType) || p.HasDefaultValue), Is.True);
}
public void TheConstructorWithTheFewestParametersWithDefaultValuesIsSelected()
{
SetResolvable(typeof(IInterface1));
SetResolvable(typeof(IInterface2));
SetResolvable(typeof(IInterface3));
SetResolvable(typeof(IInterface4));
var sut = new ResolverConstructorSelector();
ConstructorInfo ctor;
sut.TryGetConstructor(typeof(Class4), MockResolver.Object, out ctor);
Assert.That(ctor.GetParameters().Select(p => p.ParameterType), Is.EquivalentTo(new[] { typeof(IInterface1), typeof(IInterface2) }));
}
public void IfNoParametersAreDefaultOnEitherReturnsFalse()
{
SetResolvable(typeof(IInterface1));
SetResolvable(typeof(IInterface2));
SetResolvable(typeof(IInterface3));
SetResolvable(typeof(IInterface4));
var sut = new ResolverConstructorSelector();
ConstructorInfo dummy;
Assert.That(sut.TryGetConstructor(typeof(Class1), MockResolver.Object, out dummy), Is.False);
}
public void NeverSelectsAConstructorWithANonDefaultPrimitivishParameter()
{
SetResolvable(typeof(IInterface1));
SetResolvable(typeof(IInterface2));
SetResolvable(typeof(IInterface3));
var sut = new ResolverConstructorSelector();
var ctor = sut.GetConstructor(typeof(Class3), MockResolver.Object);
Assert.That(ctor.GetParameters().Length, Is.EqualTo(1));
}