expect

• Type: ExpectOptions

expect.requireAssertions

• Type: boolean
• Default: false

The same as calling expect.hasAssertions() at the start of every test. This makes sure that no test will pass accidentally.

TIP

This only works with Vitest's expect. If you use assert or .should assertions, they will not count, and your test will fail due to the lack of expect assertions.

You can change the value of this by calling vi.setConfig({ expect: { requireAssertions: false } }). The config will be applied to every subsequent expect call until the vi.resetConfig is called manually.

WARNING

When you run tests with sequence.concurrent and expect.requireAssertions set to true, you should use local expect instead of the global one. Otherwise, this may cause false negatives in some situations (#8469).

expect.poll

Global configuration options for expect.poll. These are the same options you can pass down to expect.poll(condition, options).

expect.poll.interval

• Type: number
• Default: 50

Polling interval in milliseconds

expect.poll.timeout

• Type: number
• Default: 1000

Polling timeout in milliseconds