Method toBeNull

packages/expect/src/types.ts:198–198

* This is the same as `.toBe(null)` but the error messages are a bit nicer. * So use `.toBeNull()` when you want to check that something is null.

()

   * So use `.toBeNull()` when you want to check that something is null.
   */
  toBeNull(): R;
  /**
   * Use when you don't care what a value is, you just want to ensure a value
   * is true in a boolean context. In JavaScript, there are six falsy values: