v30.0.1

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v30.0.0

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v22.1.0

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• d36e921b
  fix: let returns override returnsArg (王胜)

  Signed-off-by: 王胜 <2318857637@​qq.com>

• 40c4caa0
  fix: align restoreObject docs test with idempotent behavior (#​2745) (Julia Miller)

  restoreObject was made idempotent in #​2737 — it no longer throws
  for objects with no restorable methods. Updates the docs page
  and its corresponding test to reflect this.

• a68dac19
  fix: throw a clear error when throwArg index equals the argument count (#​2743) (spokodev)

  • fix: throw a clear error when throwArg index equals the argument count

  spyCall.throwArg(pos) guarded with pos > this.args.length, so calling it
  with pos equal to the number of recorded arguments slipped past the guard
  and reached throw this.args[pos], throwing undefined instead of the
  intended TypeError. A thrown undefined cannot be inspected as an Error and
  is reported by test frameworks as no exception thrown.

  Use >= to match ensureArgs in behavior.js and the sibling callArg helpers,
  which already reject an out-of-range index with a clear error.

• 9ea504e3
  feat: make sinon.restoreObject idempotent (#​2737) (Ilia Choly)

  Passing an object with no live fakes to restoreObject now restores
  nothing instead of throwing, giving it symmetry with sinon.restore()
  and sandbox.restore(). The strict "found no methods" check is retained
  for spy(object) and stub(object), which now use a dedicated
  walkObjectStrict export, while restoreObject uses the loose walkObject.
  Passing a falsy value still throws.

  Fixes #​2736

• 4db4feff
  fix: preserve fake undefined argument validation (Vishal Kumar Singh)
• 755a40d7
  fix: isolate callId counter per sandbox for parallel test support (Vishal Kumar Singh)

  The global callId counter in proxy-invoke.js caused calledImmediatelyBefore
  and calledImmediatelyAfter to fail when tests run in parallel with separate
  sandboxes. Each sandbox now maintains its own callId counter, passed through
  the spy/stub/fake creation chain via a context object.

  Fixes #​2472

Released by Morgan Roderick on 2026-07-20.

v22.0.0

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• ed911df5
  Update Ruby gems (Carl-Erik Kopseng)
• 75a1e5b8
  Update to Node 26 (Carl-Erik Kopseng)
• 197d6608
  Update documentation on faking timers to reflect the current state of fake-timers (Carl-Erik Kopseng)
• c5ddf80b
  Update fake-timers@​15.4: includes new Temporal API (Carl-Erik Kopseng)
• f4ab02f6
  Update updatable packages (Carl-Erik Kopseng)
• 0536afc8
  Quality: Global mutable call id can grow unbounded across long-lived processes (#​2691) (tuanaiseo)

  • refactor: global mutable call id can grow unbounded across l

  callId is module-scoped and incremented on every invocation. In long-running test runners or embedded usage, this can grow indefinitely and eventually lose integer precision semantics for strict ordering comparisons.

  Affected files: proxy-invoke.js

  Signed-off-by: tuanaiseo 221258316+tuanaiseo@users.noreply.github.com

  • Wrap around for all values that are too high

  ---

  Signed-off-by: tuanaiseo 221258316+tuanaiseo@users.noreply.github.com
  Co-authored-by: Carl-Erik Kopseng carlerik@gmail.com

• f4f7d93b
  Perform additional cleanup when calling callThrough() (#​2670) (Cyrille)
• 6199e9e4
  improve GitHubworkflows by introducing zizmor for monitoring (#​2686) (Till!)

  • fix(workflows): fetch-depth is for actions/checkout

  • chore(workflows): update

  • pin all actions to precise commits
  • avoid credential leakage from actions/checkout
  • group action updates going forward
  • add zimor config to ignore "secrets outside env"
  • add job to keep validating workflows

• f7476b59
  Use path.normalize() for path normalization (Carl-Erik Kopseng)
• 2c975393
  fix: make build and node test scripts cross-platform (laplace young)
• a7692917
  fix: isolate walk state from Object prototype (laplace young)
• 66df977a
  Fix sinon.restore() cascade-restoring sub-sandboxes (#​2704) (Charlie Leitheiser)

  The ESM port of createApi (#​2683, shipped in 21.1.0) replaced createSandbox: createSandbox with a wrapper that pushes every newly-created sandbox into the root sandbox's fake collection:

  createSandbox: function createSandbox(config) {
      const s = createConfiguredSandbox(config);
      sandbox.getFakes().push(s);
      return s;
  }
  

  Sandbox#restore then walks that collection and calls .restore() on each entry. Because a sub-sandbox is itself an entry, every top-level sinon.restore() cascades into every sub-sandbox and undoes its stubs/timers/etc. — defeating the whole point of having an isolated sub-sandbox. The same cascade hits resetHistory and
  verifyAndRestore. This is the regression reported in #​2701.

  Restore the pre-21.1 behaviour: hand the root API a direct reference to createConfiguredSandbox. Sub-sandboxes are now isolated; only subSandbox.restore() (or verifyAndRestore) clears their fakes.

  Also flip the four sandbox tests that were locking in the buggy cascade: they now assert the parent's restore/resetHistory leaves the child untouched, with an explicit child-side cleanup at the
  end.

  Closes #​2701

• f0bd6e1b
  fix: exclude proto from walk() (#​2699) (Kevin Locke)

  __proto__ is a special property to access an object's prototype. It
  has many pitfalls:

  • Setting it to an object value changes an object's prototype, which is
    generally discouraged and may be unexpected by the iterator callback.
  • Setting it to a non-object value does nothing (meaning seen[k] = true has no effect).
  • When Node.js is run with the --disable-proto=throw option, getting
    or setting __proto__ causes an exception with code
    ERR_PROTO_ACCESS to be thrown.

  Additionally, since this property (and all properties of
  Object.prototype) are currently unused in this project by consumers of
  walk(), it is both safe and preferable to exclude.

  Fixes: #​2695

  Signed-off-by: Kevin Locke kevin@kevinlocke.name

• 1f8afd50
  chore: add context7.json for ownership confirmation (Morgan Roderick)

Released by Carl-Erik Kopseng on 2026-05-05.

v9.0.1

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Bug Fixes

• inline RawSourceMap type to remove external @​types dependency from public types (#​412) (3096e47)

v9.0.0

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Features

• feat!: bump vite peer dependency from >=4 to >=7 (#​406) (0118fad)
• feat!: migrate from unbuild/rollup to tsdown/rolldown (#​405) (6c09248)
• support custom instrumenter option (#​402) (87458e8)

BREAKING CHANGES

• Minimum required Vite version is now 7, up from 4.
• Replaced unbuild/rollup with tsdown/rolldown.