Fix test explorer tree state reset on test execution #4674
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Co-authored-by: hanniavalera <90047725+hanniavalera@users.noreply.github.com>
…stale items Co-authored-by: hanniavalera <90047725+hanniavalera@users.noreply.github.com>
…itation Co-authored-by: hanniavalera <90047725+hanniavalera@users.noreply.github.com>
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[WIP] Fix test explorer tree expand/collapse reset when running tests
Jan 29, 2026
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This changes visible behavior
Test Explorer now preserves expand/collapse state when running tests with
cmake.ctest.testSuiteDelimiterenabled.The following changes are proposed:
testExplorerRoot.children.replace([])with selective updates. VS Code tracks UI state by object identity, not ID.children.get(id)before creating new TestItems in bothcreateTestItemAndSuiteTree()andrefreshTestsInTestExplorer()Other Notes/Information
Limitation: Nested tests removed from suites remain until parent suite removal. Full recursive cleanup deferred for complexity.
Security: CodeQL scan clean (0 alerts)
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2wrvsblobprodwus2180.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)40vvsblobprodwus2135.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)b15vsblobprodwus2164.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)b53vsblobprodwus2154.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)d94vsblobprodwus2119.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)k4pvsblobprodwus2140.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)n6wvsblobprodwus2123.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)p2tvsblobprodwus2189.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)v41vsblobprodwus2175.vsblob.vsassets.io/usr/local/bin/node node /usr/local/bin/yarn install(dns block)If you need me to access, download, or install something from one of these locations, you can either:
Original prompt
This section details on the original issue you should resolve
<issue_title>[Bug] Test explorer tree expand / collapse are reset when running test</issue_title>
<issue_description>### Brief Issue Summary
I'm using the
cmake.ctest.testSuiteDelimitersetting to view my gtests in the test explorer as a tree. When I run any of the tests, after expanding one of the tree elements, it will revert to the closed state. I am able to keep the tree open if I reload the window with the tree expanded, but then when I run a test after collapsing the tree it reverts to being expanded. It's almost like the tree has an initial state of what is expanded and running a test reverts to that state.CMake Tools Diagnostics
{ "os": "linux", "vscodeVersion": "1.106.2", "cmtVersion": "1.21.36", "configurations": [ { "folder": "/home/thomas/projects/git/wavefront", "cmakeVersion": "3.31.6", "configured": true, "generator": "Ninja", "usesPresets": false, "compilers": { "C": "/usr/bin/gcc", "CXX": "/usr/bin/g++" } } ], "cpptoolsIntegration": { "isReady": false, "hasCodeModel": false, "activeBuildType": "", "buildTypesSeen": [], "requests": [], "responses": [], "partialMatches": [], "targetCount": 0, "executablesCount": 0, "librariesCount": 0, "targets": [] }, "settings": [ { "communicationMode": "automatic", "useCMakePresets": "auto", "configureOnOpen": true } ] }Debug Log