public void If_WithFuncOfBooleanAndThenMonadType() // M<T> If<T>(Func<Boolean>, M<T>)
{
var spec = MethodSpecificationBuilder
.Named("If")
.IsStatic()
.IsPublic()
.IsNotExtensionMethod()
.IsOpenGeneric()
.GenericArgument(ga => ga
.Named("T")
.AtIndex(0)
.CanBeReferenceType()
.CanBeValueType())
.HasParameters(2)
.Parameter((m, p) => p
.Named("predicate")
.AtIndex(0)
.Type(t => t.IsEqualTo(typeof(Func <bool>))))
.Parameter((m, p) => p
.Named("then")
.AtIndex(1)
.Type(t => t.IsEqualTo(m.ReturnType)))
.Returns((m, t) => t
.IsEqualTo(MonadType.MakeGenericType(m.ReturnType.GetGenericArguments())));
Assert.IsNotNull(ExtensionType.GetMethods().Single(spec.ToFunc()));
}
public void Defer_WithFunctionThatReturnsMonadType() // M<T> Defer<T>(Func<M<T>>)
{
var spec = MethodSpecificationBuilder
.Named("Defer")
.IsStatic()
.IsNotExtensionMethod()
.IsPublic()
.IsOpenGeneric()
.GenericArgument(ga => ga
.Named("T")
.AtIndex(0)
.CanBeReferenceType()
.CanBeValueType())
.HasParameters(1)
.Parameter((m, p) => p
.Named("computation")
.AtIndex(0)
.Type(t => t.IsEqualTo(typeof(Func <>).MakeGenericType(m.ReturnType))))
.Returns((m, t) => t
.IsEqualTo(MonadType.MakeGenericType(m.ReturnType.GetGenericArguments())));
Assert.IsNotNull(ExtensionType.GetMethods().Single(spec.ToFunc()));
}