Create an asymmetric matcher for a promise resolved value.
Symbol
Expect.resolvesTo
resolvesTo: AsymmetricMatchers
expect(Promise.resolve("value")).toEqual(expect.resolvesTo.stringContaining("value")); // will pass
expect(Promise.reject("value")).toEqual(expect.resolvesTo.stringContaining("value")); // will fail
expect("value").toEqual(expect.resolvesTo.stringContaining("value")); // will fail