fix: type check for error instance when used toThrowError method

[verycosy]

Summary

toThrow/toThrowError method does not type checking when expected value is error instance.

current behavior

class ErrorA extends Error { }
class ErrorB extends Error { }

const throwErrorA = () => {
  throw new ErrorA();
};

expect(throwErrorA).toThrowError(ErrorA); // pass
expect(throwErrorA).toThrowError(new ErrorA()); // pass
expect(throwErrorA).not.toThrowError(ErrorB); // pass
expect(throwErrorA).not.toThrowError(new ErrorB()); // fail, but this test should be passed

expect behavior

expect(throwErrorA).not.toThrowError(new ErrorB()); // pass

I added some codes that compare type for this problem.
When comparing, need to check error instance is custom error or not.
Because in some tests like this:

// jest-runtime/src/__test__/runtime_internal_module.test.js >> internalModule
it('loads modules and applies transforms', async () => {
  const runtime = await createRuntime(__filename, {
    transform: {'\\.js$': './test_preprocessor'},
  });
  const modulePath = path.resolve(
    path.dirname(runtime.__mockRootPath),
    'internal-root.js',
  );
  expect(() => {
    runtime.requireModule(modulePath);
  }).toThrow(new Error('preprocessor must not run.'));
});

In this case, both thrown.value and expected are Error instances.
But their constructor is not same.

console.log(thrown.value.constructor); // [Function: Error] { stackTraceLimit: 100 }
console.log(expected.constructor); 
/*
[Function: Error] {
    stackTraceLimit: 100,
     prepareStackTrace: [Function: prepareStackTrace]
}
*/

It's no wonder that thrown.value instanceof expected.constructor is false, thus test will fail.
So I checked expected error is custom error or not before comparing type of instance.

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[SimenB]

Great stuff, thanks!

[github-actions]

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[SimenB]

https://github.com/jestjs/jest/releases/tag/v30.0.0-alpha.1