Uint8.buffer is not instance of ArrayBuffer when environment is jsdom

[charlie632]

Describe the bug

Checking the uint8.buffer instance fails when checking with the global ArrayBuffer class.

/**
 * @vitest-environment jsdom
 */

describe(() => {
  it('arraybuffer', async () => {
    const uint8 = new Uint8Array([1]);
    expect(uint8.constructor.name).toBe('Uint8Array');
    expect(uint8 instanceof Uint8Array).toBeTruthy();
    expect(ArrayBuffer.isView(uint8)).toBeTruthy();
    expect(uint8.buffer instanceof ArrayBuffer).toBeTruthy();
  });
});

When using @vitest-environment jsdom.

Using node works well, tho.

This scenario should work in the browser as seen here:

Using:

"vitest@0.28.4"

"jsdom@22.1.0"

Reproduction

/**
 * @vitest-environment jsdom
 */

describe(() => {
  it('arraybuffer', async () => {
    const uint8 = new Uint8Array([1]);
    expect(uint8.constructor.name).toBe('Uint8Array');
    expect(uint8 instanceof Uint8Array).toBeTruthy();
    expect(ArrayBuffer.isView(uint8)).toBeTruthy();
    expect(uint8.buffer instanceof ArrayBuffer).toBeTruthy();
  });
});

System Info

System:
    OS: macOS 13.5
    CPU: (10) arm64 Apple M1 Pro
    Memory: 1.18 GB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 16.18.1 - ~/.nvm/versions/node/v16.18.1/bin/node
    Yarn: 1.19.0 - ~/Workspace/platform/client-applications/node_modules/.bin/yarn
    npm: 8.19.2 - ~/.nvm/versions/node/v16.18.1/bin/npm
  Browsers:
    Chrome: 115.0.5790.170
    Chrome Canary: 118.0.5953.0
    Edge: 115.0.1901.200
    Firefox: 116.0.2
    Safari: 16.6

Used Package Manager

yarn

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[charlie632]

Please, let me know if this is a JSDOM specific issue, if so, I can report it there.

[charlie632]

Thanks @sheremet-va!