`expect.typeOf(type)`

An asymmetric matcher that checks if the received value is of the specified type, using typeof.

it("is of the correct type", () => {
const values = {
  number: 1,
  string: "hello",
  boolean: true,
};
expect(values).toEqual({
  number: expect.typeOf("number"),
  string: expect.typeOf("string"),
  boolean: expect.typeOf("boolean"),
});
});