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chore(mutation-gate): use plugin-side related-test discovery for the extension package #2211

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chore(mutation-gate): use plugin-side related-test discovery for the extension package #2211

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chore(mutation-gate): use plugin-side related-test discovery for the …
easonLiangWorldedtech Oct 27, 2026
363d272
Merge branch 'main' into chore/stryker-related-test-discovery
easonLiangWorldedtech Oct 28, 2026
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10 changes: 8 additions & 2 deletions scripts/stryker-diff.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -57,8 +57,14 @@ export const PACKAGE_CONFIGS = [
root: "src",
sourceRoot: "src/",
vitestConfig: "vitest.config.ts",
vitestRelated: false,
discoverRelatedTests: true,
// Use plugin-side related-test discovery for the extension package: with an
// explicit STRYKER_TEST_FILES list, stryker-js 10.0.0 plans static mutants with
// runtime activation (stryker-mutator/stryker-js#6144, #6209), which the vitest
// plugin can only apply after top-level code has run, producing false Survived
// results. Revert to vitestRelated: false / discoverRelatedTests: true once the
// upstream planner fix lands.
vitestRelated: true,
discoverRelatedTests: false,
// CI build/coverage tooling under src/scripts is excluded like the other build scripts:
// it is not shipped runtime code and is covered by src/scripts/__tests__/merge-lcov.spec.mjs.
excludedPaths: [
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7 changes: 5 additions & 2 deletions scripts/stryker-diff.test.mjs
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Expand Up @@ -254,8 +254,11 @@ describe("buildManifest", () => {
assert.equal(webview.runRoot, ".")
assert.equal(webview.discoverRelatedTests, true)
assert.equal(webview.vitestRelated, false)
assert.equal(extension.discoverRelatedTests, true)
assert.equal(extension.vitestRelated, false)
// The extension package deliberately uses plugin-side discovery (see the
// comment in PACKAGE_CONFIGS): stryker-js 10.0.0 mis-activates static mutants
// when an explicit STRYKER_TEST_FILES list is supplied.
assert.equal(extension.discoverRelatedTests, false)
assert.equal(extension.vitestRelated, true)
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const types = manifest.packages.find(({ id }) => id === "types")
assert.equal(types.discoverRelatedTests, undefined)
assert.equal(types.vitestRelated, undefined)
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