Performance and tests improvements

[jkyberneees]

No description provided.

[Copilot]

Pull Request Overview

This PR enhances performance optimizations in the router implementation and significantly expands test coverage across middleware, edge cases, and configuration.

• Added extensive unit tests for middleware behavior, routing edge cases, and configuration overrides
• Optimized URL parsing, caching, and parameter assignment in lib/router/sequential.js and streamlined next function in lib/next.js
• Updated package.json test script to include coverage and removed deprecated smoke tests

Reviewed Changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/unit/middleware.test.js	New unit tests covering middleware sequencing and errors
test/unit/edge-cases.test.js	New tests for router edge and boundary conditions
test/unit/config.test.js	New tests for custom error/default route configuration
test/smoke.test.js	Removed legacy smoke tests
test/helpers/index.js	Added test helpers (createTestRequest, measureTime)
test/fixtures/index.js	Added reusable fixtures with ES module exports
test/config.test.js	Removed old config tests
package.json	Changed test script to run with coverage
lib/router/sequential.js	Rewrote URL parsing, caching, and param assignment
lib/next.js	Optimized middleware next function
bench.ts	Reformatted quotes and updated import style
.vscode/settings.json	Added empty VS Code settings file

Comments suppressed due to low confidence (2)

lib/router/sequential.js:36

• In an arrow function, this is inherited from the outer scope, not the router instance. Returning this here won’t return router, which breaks chaining. Consider returning router explicitly.

return this

test/fixtures/index.js:9

• This file uses ES module export syntax while the test suite and helpers use CommonJS. It may cause import errors unless the test runner is configured for ESM. Consider switching to module.exports or renaming to .mjs.

export const ROUTES = {

[Copilot]

[nitpick] The measureTime helper is defined but not referenced anywhere in the tests. Consider removing it or adding tests that leverage it to avoid dead code.