fix(expect-utils): Fix deep equality of ImmutableJS Lists

[romellem]

Summary

Fixes #12752

Test plan

I could add a test case for iterableEquality, but I'd need to introduce immutable as a dev dependency. Let me know if you'd like to. Otherwise, this relies on the fact that immutable's List implements a similar API to native Set objects, importantly, .has().

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[SimenB]

I could add a test case for iterableEquality, but I'd need to introduce immutable as a dev dependency. Let me know if you'd like to.

Yes please, a dev dep is perfectly fine! (we already have one in pretty-format 🙂 )

[SimenB]

Seems this broke some other tests we have, actually

[romellem]

Thanks, I'll add the new tests and look at the errors on the existing tests a little later on.

[romellem]

Didn't read the logic carefully enough for Sets, it isn't checking order (which makes sense). So instead we don't do the entries check if the objects are Lists.

[SimenB]

seems reasonable, thanks!

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