xJet-ExpectPowerful Assertions for Seamless Testing

A TypeScript-based matcher library with Jest-style assertions for testing mocks and verifying function calls, thrown errors, and returned values.

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TypeScript First

Full TypeScript support with comprehensive type definitions for maximum type safety, autocomplete, and IDE integration.

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Works seamlessly with ES modules in modern JavaScript environments and build systems.

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Helpful, colorized error output for failed assertions that makes debugging test failures faster and easier.

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Flexible partial matching for complex objects and arrays with intuitive matching patterns.

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Comprehensive mock function call tracking and assertions for effective test isolation and verification.

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First-class support for async/await and Promise testing with resolves/rejects assertion chains.