Function expect

frontend/src/utils/interpreter/helpers.ts:48–65

(testOrName: string | (() => boolean), test?: () => boolean)

export function expect(test: () => boolean): void;
export function expect(name: string, test: () => boolean): void;
export function expect(testOrName: string | (() => boolean), test?: () => boolean) {
  // biome-ignore lint/style/noNonNullAssertion: test related, will remove soon with Vitest
  const testFunc = typeof testOrName === 'function' ? (testOrName as () => boolean) : test!;

  const name = typeof testOrName === 'string' ? (testOrName as string) : null;

  if (testFunc()) {
    successfulTests += 1;
    return; // Success
  }

  // Failed!
  throw new Error(`
Test failed ${name ? `: ${name}` : ''}
    ${testFunc.toString()}

`);
}