Unit-testing equality?

[dakom]

What would be the idiomatic way to unit test for equality?

For Cells I assume:

function cEq(a:Cell, b:Cell):boolean {
   return a.sample() === b.sample();
}

But for Stream I'm not sure - should it be defined in terms of Cell? e.g.

function sEq(a:Stream, b:Stream):boolean {
   return cEq(a.hold(undefined), b.hold(undefined));
}

[the-real-blackh]

There isn't any notion of equality for cells and streams. If it's for unit testing, then you can define whatever is most convenient depending on what you want to do.
The unit tests in the project have a listener that adds to a list, and then at the end, the list is compared to a list of what it should contain.