Fix for 4286: Compare Maps and Sets by value rather than order #4303
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Nice!! Do you mind removing the |
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d'oh! of course :) @cpojer Do you think it's worth separating out because sets and maps set entries via === strict equality comparison. We'd have to iterate over each set again for every object to find and do a nested comparison. Thoughts? |
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Yep, I think that makes sense. Thank you so much for this PR and fixing issues in Jest :) |
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Thanks for the fix! |
…s#4303) * Add check for Maps & Sets * check for presence of .size() * exit early if size doesn't equal * replace spread with args array
jestjs#4303 added code to check Set equality in an order-independent way, but applied that logic to all iterable objects. This change limits the scope of the special-case to just Set and Map, and corrects the Map case to test that both keys and values are equal.
jestjs#4303 added code to check Set equality in an order-independent way, but applied that logic to all iterable objects. This change limits the scope of the special-case to just Set and Map, and corrects the Map case to test that both keys and values are equal.
* fix Map equality test #4303 added code to check Set equality in an order-independent way, but applied that logic to all iterable objects. This change limits the scope of the special-case to just Set and Map, and corrects the Map case to test that both keys and values are equal. * use isA instead of instanceof
* fix Map equality test jestjs#4303 added code to check Set equality in an order-independent way, but applied that logic to all iterable objects. This change limits the scope of the special-case to just Set and Map, and corrects the Map case to test that both keys and values are equal. * use isA instead of instanceof
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Summary
Fix for #4286
Modify
iterableEqualitymethod so that, if two objects have the same constructor with.sizeproperty (i.e.,MapandSet), check if the sizes are same. If not, exit early and return false. If yes, perform a union and if the size is still the same, return true. Otherwise, keep checking for deep equality (cases where the elements contain another object)Test plan
Added test cases to
matchers.test.js