exports[`test test.js 1`] = `
"class A {
    foo(): A { return this; }
}
class B extends A {
    foo(): B { return this; }
}
class C extends A {}
var a: A = new B();
a.foo = function(): C { return new C(); }
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class A {
  foo(): A {
    return this;
  }
}
class B extends A {
  foo(): B {
    return this;
  }
}
class C extends A {}
var a: A = new B();
a.foo = function(): C {
  return new C();
};
"
`;