fix(NODE-4763): cache `resumeToken` in `ChangeStream.tryNext()`#4636

Merged

baileympearson merged 10 commits intomainfrom

Sep 8, 2025

Commits on Sep 8, 2025

test(NODE-4763): add tests for resumeToken caching mechanism
tadjik1
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fix(NODE-4763): cache resume token in ChangeStream#tryNext() method
tadjik1
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test(NODE-4763): incorporated suggested changes in assertions
tadjik1
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test(NODE-4763): make sure the resume happened after the failure
tadjik1
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test(NODE-4763): add test for hasNext->next usage scenario
tadjik1
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test(NODE-4763): use times:1 for failpoint to explicitly set failure
tadjik1
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test(NODE-4763): remove `skip` mode from `FailPoint`
tadjik1
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test(NODE-4763): changed wording for title of the test

tadjik1
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baileympearson
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test(NODE-4763): clarify hasNext test description and comments; no behavior change
tadjik1
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test(NODE-4763): reorganize cache token test suite
tadjik1
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