Restore sinon.createStubInstance() behaviour #2075
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PR sinonjs#2022 redirected sinon.createStubInstance() to use the Sandbox implementation thereof. This introduced a breaking change due to the sandbox implementation not supporting property overrides. Instead of duplicating the original behaviour from stub.js into sandbox.js, call through to the stub.js implementation then add all the stubs to the sandbox collection as usual. Copy the missing tests from stub-test.js and add issue tests.
kevinbosman
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mroderick
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Sep 2, 2019
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Purpose (TL;DR) - mandatory
Fix issue #2073 by reusing
createStubInstance()behaviour fromstub.jswhile maintaining the sandboxcollection.Background (Problem in detail) - optional
PR #2022 redirected
sinon.createStubInstance()to use the Sandbox implementation thereof. This introduced a breaking change due to the sandbox implementation not supporting property overrides.Solution - optional
This PR extends
sandbox.createStubInstance()to mimic the behaviour of the originalsinon.createStubInstance()method.Instead of duplicating the original
createStubInstance()behaviour fromstub.jsintosandbox.js, it now calls through to thestub.jsimplementation, then adds all the stubs to the sandboxcollectionas usual.The extra tests for property overrides in
stub-test.jshave also been added tosandbox-test.jsto ensure the sandbox implementation now works the same as the originalcreateStubInstance(), while maintaining backward compatibility with all existing sandbox tests.EDIT: Added some specific tests for issue #2073 in
issues-test.js.How to verify - mandatory
npm installnpm testChecklist for author
npm run lintpasses