public async Task FromFunc_Typed_HappyPath()
{
int counter = 0;
var eff = Eff.FromFunc(async() => ++ counter);
Assert.Equal(0, counter);
Assert.Equal(1, await eff.Run(Handler));
Assert.Equal(1, counter);
}
public async Task FromFunc_Untyped_Exception()
{
var eff = Eff.FromFunc(async() => { throw new DivideByZeroException(); });
await Assert.ThrowsAsync <DivideByZeroException>(() => eff.Run(Handler));
}