Package setup

Custom message usage

Default configuration

showPrefix control

Multiple option combination

Configuration variety

Library import

Jest configuration

Custom message usage

Matcher compatibility

Basic custom messages

Async matcher messages

Message quality

Configuration options

Setup configuration

Library setup

Baseline assertions

Enhanced assertions

Matcher compatibility

Timing measurements

Return structure

Package setup

Custom messages provided

showPrefix option usage

showMatcherMessage option usage

showStack option usage

Multiple configurations

Uses expect with message parameter

Custom messages are descriptive

Works with standard matchers

Handles negation with .not

Tests cover all scenarios

Proper test structure

Setup jest-expect-message

Custom messages usage

.resolves matcher chain

.rejects matcher chain

.not.resolves chain

Message clarity

Custom messages usage

expect.any() usage

expect.objectContaining() usage

expect.arrayContaining() usage

Combined asymmetric matchers

Message quality

expect.extend usage

Matcher return structure

toBeValidPrice implementation

toBeInStock implementation

toHaveCategory implementation

toHaveAllTags implementation

Negation support

Jest-expect-message compatibility

Custom messages usage

Standard matchers

Negated matchers

Async matchers

Multiple matcher types

Package setup