prettier/tests/flow/this/__snapshots__/jsfmt.spec.js.snap

// Jest Snapshot v1, https://goo.gl/fbAQLP

exports[`This.js 1`] = `
====================================options=====================================
parsers: ["flow"]
printWidth: 80
                                                                                | printWidth
=====================================input======================================
/* @providesModule This */

function F() { this.x = 0; }
F.prototype.m = function() { this.y = 0; }

function foo(p:string) { }

var o1 = new F(); // sets o1.x to 0
o1.x = "";
foo(o1.x); // ok by definite assignment

var o2 = new F();
o1.y = 0;
o2.y = "";
foo(o2.y); // setting o1.y to 0 has no effect on o2.y

var o3 = new F();
o3.m(); // sets o3.y to 0
o3.y = "";
foo(o3.y); // ok by definite assignment
foo(o2.y); // setting o3.y to 0 has no effect on o2.y

/*
 * this bindings:
 */

/* standard functions may rebind this */
function f1() : number {
  return this.x
}

var f1_1 = f1.bind({x: 0})();            // ok
var f1_2 : string = f1.bind({x: 0})();   // error, number -> string
var f1_3 = f1.bind({x: ""})();           // error, string -> number
// TODO make this error blame the call site, rather than the function body
var f1_4 = f1();                         // error, (global object).x

/* arrow functions bind this at point of definition */
/* top level arrow functions bind this to global object */
var a1 = () => {
  return this.x
}

var ax = a1();                          // error, (this:mixed).x

/* nested arrows bind enclosing this (which may itself rebind) */
function f2() : number {
    var a2 = () => { return this.x };
    return a2()
}

var f2_1 = f2.bind({x: 0})();            // ok
var f2_2 : string = f2.bind({x: 0})();   // error, number -> string
var f2_3 = f2.bind({x: ""})();           // error, string -> number
// TODO make this error blame the call site, rather than the function body
var f2_4 = f2();                         // error, (global object).x

(this: void);

module.exports = true;

=====================================output=====================================
/* @providesModule This */

function F() {
  this.x = 0;
}
F.prototype.m = function() {
  this.y = 0;
};

function foo(p: string) {}

var o1 = new F(); // sets o1.x to 0
o1.x = "";
foo(o1.x); // ok by definite assignment

var o2 = new F();
o1.y = 0;
o2.y = "";
foo(o2.y); // setting o1.y to 0 has no effect on o2.y

var o3 = new F();
o3.m(); // sets o3.y to 0
o3.y = "";
foo(o3.y); // ok by definite assignment
foo(o2.y); // setting o3.y to 0 has no effect on o2.y

/*
 * this bindings:
 */

/* standard functions may rebind this */
function f1(): number {
  return this.x;
}

var f1_1 = f1.bind({ x: 0 })(); // ok
var f1_2: string = f1.bind({ x: 0 })(); // error, number -> string
var f1_3 = f1.bind({ x: "" })(); // error, string -> number
// TODO make this error blame the call site, rather than the function body
var f1_4 = f1(); // error, (global object).x

/* arrow functions bind this at point of definition */
/* top level arrow functions bind this to global object */
var a1 = () => {
  return this.x;
};

var ax = a1(); // error, (this:mixed).x

/* nested arrows bind enclosing this (which may itself rebind) */
function f2(): number {
  var a2 = () => {
    return this.x;
  };
  return a2();
}

var f2_1 = f2.bind({ x: 0 })(); // ok
var f2_2: string = f2.bind({ x: 0 })(); // error, number -> string
var f2_3 = f2.bind({ x: "" })(); // error, string -> number
// TODO make this error blame the call site, rather than the function body
var f2_4 = f2(); // error, (global object).x

(this: void);

module.exports = true;

================================================================================
`;

exports[`arrows.js 1`] = `
====================================options=====================================
parsers: ["flow"]
printWidth: 80
                                                                                | printWidth
=====================================input======================================
class C {
  foo() {
    return () => { return this.bar(); }; // OK, since this: C
  }
  bar() { return this; } // return type is C
}
var c = new C;
var f = c.foo();
var i = f(); // OK
(i: C); // OK

class D extends C { }
var d = new D;
var g = d.foo();
var j = g(); // OK
(j: D); // error, since return type of bar is C, not the type of \`this\`

class E {
  foo(x: number) { }
}
class F extends E {
  foo() { // OK to override with generalization
    (() => {
      super.foo(""); // find super method, error due to incorrect arg
    })();
  }
}

=====================================output=====================================
class C {
  foo() {
    return () => {
      return this.bar();
    }; // OK, since this: C
  }
  bar() {
    return this;
  } // return type is C
}
var c = new C();
var f = c.foo();
var i = f(); // OK
(i: C); // OK

class D extends C {}
var d = new D();
var g = d.foo();
var j = g(); // OK
(j: D); // error, since return type of bar is C, not the type of \`this\`

class E {
  foo(x: number) {}
}
class F extends E {
  foo() {
    // OK to override with generalization
    (() => {
      super.foo(""); // find super method, error due to incorrect arg
    })();
  }
}

================================================================================
`;