bun.sh/docs/guides/test/todo-tests.md

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Mark a test as a "todo" with the Bun test runner

To remind yourself to write a test later, use the test.todo function. There's no need to provide a test implementation.

import { test, expect } from "bun:test";

// write this later
test.todo("unimplemented feature");

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The output of bun test indicates how many todo tests were encountered.

$ bun test

test.test.ts:
✓ add [0.03ms]
✓ multiply [0.02ms]
✎ unimplemented feature

 2 pass
 1 todo
 0 fail
 2 expect() calls
Ran 3 tests across 1 files. [74.00ms]

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Optionally, you can provide a test implementation.

import { test, expect } from "bun:test";

test.todo("unimplemented feature", () => {
  expect(Bun.isAwesome()).toBe(true);
});

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If an implementation is provided, it will be executed and expected to fail by test runner! If a todo test passes, the bun test run will return a non-zero exit code to signal the failure.

$ bun test
$ echo $?
1 # this is the exit code of the previous command

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See also:

• Skip a test
• Docs > Test runner > Writing tests