test: easier way to write hmr test cases

[LingyuCoder]

Summary

before:

expect(value).toBe(1);
NEXT(require("../../update")(done, true, () => {
	expect(value).toBe(2);
	NEXT(require("../../update")(done, true, () => {
		expect(value).toBe(1);
		NEXT(require("../../update")(done, true, () => {
			expect(value).toBe(3);
			done();
		}))
	}));
}));

after:

expect(value).toBe(1);
await NEXT_HMR();
expect(value).toBe(2);
await NEXT_HMR();
expect(value).toBe(1);
await NEXT_HMR();
expect(value).toBe(3);

---

generated by copilot

This pull request includes several important changes to the rspack-test-tools package, focusing on improving hot module replacement (HMR) support, simplifying the codebase, and updating test snapshots.

Improvements to HMR support:

• Added new HMR support methods in packages/rspack-test-tools/src/helper/legacy/fake-update-loader.js to handle module reexports and runtime updates.
• Introduced TestHotUpdatePlugin to enhance HMR functionality in HotProcessor and updated the loader path for hot updates. [1] [2] [3]

Codebase simplification:

• Refactored checkArrayExpectation calls to use async/await, removing unnecessary promise wrappers in multiple files (basic.ts, watch.ts, cache.ts). [1] [2] [3] [4]
• Updated HotStepRunnerFactory and HotRunnerFactory to use async/await for the next function and introduced nextHMR for handling HMR updates. [1] [2] [3] [4] [5]

Test snapshot updates:

• Updated test snapshots to reflect changes in HMR behavior and file updates across various test cases (ensure-chunk-change-to-promise-all, recovery-cacheable, recovery, hash/hot-index, recover-after-self-error, dispose-removed-module, replace-runtime-module, require-disposed-module-warning, self-accept-factory). [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rspack canceled.

Name	Link
🔨 Latest commit	4301102
🔍 Latest deploy log	https://app.netlify.com/sites/rspack/deploys/6772375eac8cc20008c4cde3

[codspeed-hq]

CodSpeed Performance Report

Merging #8849 will not alter performance

_{Comparing test/easier-hmr-case (4301102) with main (437c370)}

Summary

✅ 3 untouched benchmarks