public void TestThen()
{
ContinuousMap <int, int> c = ((ContinuousMap <int, int>)TimesTwo).Then(x => (x + 1));
Assert.NotNull(c);
Assert.Equal(expected: 15, actual: c.GetValueAt(7));
}
public void TestCompose()
{
ContinuousMap <int, int> c = ((ContinuousMap <int, int>)TimesTwo).Compose((int x) => x + 1);
Assert.NotNull(c);
Assert.Equal(16, c.GetValueAt(7));
}
public void TestCasts()
{
// C# can't go straight from the function to a ContinuousMap, because technically it's already a cast to
// become a Func (or any delegate type), double implicit casts are not considered when looking for
// conversion operators, and there's no way to specify "method set" as the source for an implicit cast.
// Oh well. Still, if we explicitly cast to Func, our conversion works:
ContinuousMap <int, int> c = (Func <int, int>)TimesTwo;
Assert.NotNull(c);
Assert.Equal(10, c.GetValueAt(5));
Assert.IsAssignableFrom <FunctionBackedContinuousMap <int, int> >(c);
Assert.Equal(4, ((FunctionBackedContinuousMap <int, int>)c).F(2));
FunctionBackedContinuousMap <int, int> d = (Func <int, int>)TimesTwo;
Assert.NotNull(d);
Assert.Equal(10, d.GetValueAt(5));
Assert.Equal(4, d.F(2));
Assert.IsAssignableFrom <ContinuousMap <int, int> >(d);
var e = (ContinuousMap <int, int>)TimesTwo;
Assert.NotNull(e);
Assert.Equal(10, e.GetValueAt(5));
Assert.IsAssignableFrom <FunctionBackedContinuousMap <int, int> >(e);
Assert.Equal(4, ((FunctionBackedContinuousMap <int, int>)e).F(2));
}
