prettier/tests/flow/predicates-inferred/__snapshots__/jsfmt.spec.js.snap

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

exports[`sanity.js 1`] = `
// @flow

// Sanity check: shouldn't be allowed to declare a predicate AND use \`chekcs\`

function check(y): %checks(typeof y === "string") {
  return typeof y === "number";
}

declare var y: number | boolean;

if (check(y)) {
  (y: number);
}

// Sanity: disallowed body
function indirect_is_number(y): %checks {
  var y = 1;
  return typeof y === "number";
}

function bak(z: string | number): number {
  if (indirect_is_number(z)) {
    return z;
  } else {
    return z.length;
  }
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// @flow

// Sanity check: shouldn't be allowed to declare a predicate AND use \`chekcs\`

function check(y): %checks(typeof y === "string") {
  return typeof y === "number";
}

declare var y: number | boolean;

if (check(y)) {
  (y: number);
}

// Sanity: disallowed body
function indirect_is_number(y): %checks {
  var y = 1;
  return typeof y === "number";
}

function bak(z: string | number): number {
  if (indirect_is_number(z)) {
    return z;
  } else {
    return z.length;
  }
}

`;

exports[`sanity-multi-params.js 1`] = `
// @flow

// Feature: multi params
function multi_param(w,x,y,z): %checks {
  return typeof z === "string";
}

function foo(x: string | Array<string>): string {
  if (multi_param("1", "2", x, "3")) {
    return x;
  } else {
    return x.join();
  }
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// @flow

// Feature: multi params
function multi_param(w, x, y, z): %checks {
  return typeof z === "string";
}

function foo(x: string | Array<string>): string {
  if (multi_param("1", "2", x, "3")) {
    return x;
  } else {
    return x.join();
  }
}

`;

exports[`sanity-ordering.js 1`] = `
// @flow

declare var key: string;
declare var obj: { page: ?Object; };

if (dotAccess(obj)) {
  (obj.page: Object);
}

function dotAccess(head, create) {
  const path = 'path.location';
  const stack = path.split('.');
  do {
    const key = stack.shift();
    head = head[key] || create && (head[key] = {});
  } while (stack.length && head);
  return head;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// @flow

declare var key: string;
declare var obj: { page: ?Object };

if (dotAccess(obj)) {
  (obj.page: Object);
}

function dotAccess(head, create) {
  const path = "path.location";
  const stack = path.split(".");
  do {
    const key = stack.shift();
    head = head[key] || (create && (head[key] = {}));
  } while (stack.length && head);
  return head;
}

`;

exports[`sanity-unbound-var.js 1`] = `
// @flow

declare var y: mixed;

// Sanity check: this should fail, because the preficate function
// checks \`y\` instead of \`x\`.
function err(x): %checks {
  return typeof y === "string";
}

function foo(x: string | Array<string>): string {
  if (err(x)) {
    return x;
  } else {
    return x.join();
  }
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// @flow

declare var y: mixed;

// Sanity check: this should fail, because the preficate function
// checks \`y\` instead of \`x\`.
function err(x): %checks {
  return typeof y === "string";
}

function foo(x: string | Array<string>): string {
  if (err(x)) {
    return x;
  } else {
    return x.join();
  }
}

`;

exports[`simple-predicate-func.js 1`] = `
// @flow

function is_string(y): %checks {
  return typeof y === "string";
}

function is_bool(y): %checks {
  return typeof y === "boolean";
}

function is_number(y): %checks {
  return typeof y === "number";
}

// Feature check:
function foo(x: string | Array<string>): string {
  if (is_string(x)) {
    // The use of \`is_string\` as a conditional check
    // should guarantee the narrowing of the type of \`x\`
    // to string.
    return x;
  } else {
    // Accordingly the negation of the above check
    // guarantees that \`x\` here is an Array<string>
    return x.join();
  }
}

// Same as above but refining an offset
function bar(z: { f: string | Array<string>}): string {
  if (is_string(z.f)) {
    return z.f;
  } else {
    return z.f.join();
  }
}

function is_number_or_bool(y): %checks {
  return is_number(y) || is_bool(y);
}

function baz(z: string | number): number {
  if (is_number_or_bool(z)) {
    return z;
  } else {
    return z.length;
  }
}

// Feature: multi params
function multi_param(w,x,y,z): %checks {
  return typeof z === "string";
}

function foo(x: string | Array<string>): string {
  if (multi_param("1", "2", "3", x)) {
    return x;
  } else {
    return x.join();
  }
}

function foo(a, b) {
  if (two_strings(a, b)) {
    from_two_strings(a, b);
  }
}

function two_strings(x,y): %checks {
  return is_string(x) && is_string(y) ;
}

declare function from_two_strings(x: string, y: string): void;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// @flow

function is_string(y): %checks {
  return typeof y === "string";
}

function is_bool(y): %checks {
  return typeof y === "boolean";
}

function is_number(y): %checks {
  return typeof y === "number";
}

// Feature check:
function foo(x: string | Array<string>): string {
  if (is_string(x)) {
    // The use of \`is_string\` as a conditional check
    // should guarantee the narrowing of the type of \`x\`
    // to string.
    return x;
  } else {
    // Accordingly the negation of the above check
    // guarantees that \`x\` here is an Array<string>
    return x.join();
  }
}

// Same as above but refining an offset
function bar(z: { f: string | Array<string> }): string {
  if (is_string(z.f)) {
    return z.f;
  } else {
    return z.f.join();
  }
}

function is_number_or_bool(y): %checks {
  return is_number(y) || is_bool(y);
}

function baz(z: string | number): number {
  if (is_number_or_bool(z)) {
    return z;
  } else {
    return z.length;
  }
}

// Feature: multi params
function multi_param(w, x, y, z): %checks {
  return typeof z === "string";
}

function foo(x: string | Array<string>): string {
  if (multi_param("1", "2", "3", x)) {
    return x;
  } else {
    return x.join();
  }
}

function foo(a, b) {
  if (two_strings(a, b)) {
    from_two_strings(a, b);
  }
}

function two_strings(x, y): %checks {
  return is_string(x) && is_string(y);
}

declare function from_two_strings(x: string, y: string): void;

`;

exports[`simple-predicate-func-post.js 1`] = `
// @flow

// Feature check:
// The predicate function is defined after the conditional check

function foo(x: string | Array<string>): string {
  if (is_string(x)) {
    // The use of \`is_string\` as a conditional check
    // should guarantee the narrowing of the type of \`x\`
    // to string.
    return x;
  } else {
    // Accordingly the negation of the above check
    // guarantees that \`x\` here is an Array<string>
    return x.join();
  }
}

function is_string(x): %checks {
  return typeof x === "string";
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// @flow

// Feature check:
// The predicate function is defined after the conditional check

function foo(x: string | Array<string>): string {
  if (is_string(x)) {
    // The use of \`is_string\` as a conditional check
    // should guarantee the narrowing of the type of \`x\`
    // to string.
    return x;
  } else {
    // Accordingly the negation of the above check
    // guarantees that \`x\` here is an Array<string>
    return x.join();
  }
}

function is_string(x): %checks {
  return typeof x === "string";
}

`;