toThrow does not show a diff with actual result

[FeldrinH]

Describe the bug

Using expect(..).toThrow(Error) the error shown on failure is simply expected error to be instance of Error. This contains very little useful info because it does not say what the actual error was or if an error was thrown at all.

I would have expected toThrow to have an output similar to to.throw, which provides a very detailed diff of the expected and actual errors.

Reproduction

test('simplerror', async () => {
    expect(async () => {}).toThrow(Error)
});

outputs

AssertionError: expected error to be instance of Error
...

instead of a detailed diff like to.error does.

System Info

  System:
    OS: Windows 10 10.0.19045
    CPU: (20) x64 13th Gen Intel(R) Core(TM) i5-13600KF
    Memory: 19.28 GB / 31.83 GB
  Binaries:
    Node: 18.15.0 - C:\Program Files\nodejs\node.EXE
    npm: 9.5.0 - C:\Program Files\nodejs\npm.CMD
    pnpm: 8.2.0 - ~\AppData\Local\pnpm\pnpm.EXE
  npmPackages:
    vitest: ^0.34.1 => 0.34.1
  Browsers:
    N/A

Used Package Manager

npm

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