expectequal

Installation

npm install pb.expectequal

Requirements

• typescript@>=5.0.0
• tsconfig.json > "compilerOptions" > { "strict": true }

import type { Expect, Equal, NotEqual } from "pb.expectequal";

const result = JSON.stringify({});

!0 as Expect<Equal<typeof result, string>>;
!0 as Expect<NotEqual<typeof result, number>>;

import { branch } from "pb.expectequal";

void function example(): string | number | undefined {
  if (branch()) {
    return "abc";
  }

  if (branch()) {
    return 12345;
  }

  return undefined;
};