v8/test/mjsunit/harmony/module-linking.js

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// Flags: --harmony-modules --harmony-scoping

// Test basic module linking and initialization.

"use strict";

module R {
  // At this point, only functions and modules are initialized.
  assertEquals(undefined, v)
  assertEquals(undefined, vv)
  assertEquals(undefined, R.v)
  assertEquals(undefined, M.v)
  assertEquals(undefined, MM.v)
  assertEquals(undefined, F.v)
  assertEquals(undefined, G.v)
  assertThrows(function() { l }, ReferenceError)
  assertThrows(function() { ll }, ReferenceError)
  assertThrows(function() { R.l }, ReferenceError)
  assertThrows(function() { M.l }, ReferenceError)
  assertThrows(function() { MM.l }, ReferenceError)
  assertThrows(function() { F.l }, ReferenceError)
  assertThrows(function() { G.l }, ReferenceError)
  assertThrows(function() { c }, ReferenceError)
  assertThrows(function() { cc }, ReferenceError)
  assertThrows(function() { R.c }, ReferenceError)
  assertThrows(function() { M.c }, ReferenceError)
  assertThrows(function() { MM.c }, ReferenceError)
  assertThrows(function() { F.c }, ReferenceError)
  assertThrows(function() { G.c }, ReferenceError)
  assertEquals(4, f())
  assertEquals(24, ff())
  assertEquals(4, R.f())
  assertEquals(14, M.f())
  assertEquals(34, MM.f())
  assertEquals(44, F.f())
  assertEquals(14, G.f())

  // All properties should already exist on the instance objects, though.
  assertTrue("v" in R)
  assertTrue("v" in RR)
  assertTrue("v" in M)
  assertTrue("v" in MM)
  assertTrue("v" in F)
  assertTrue("v" in G)
  assertTrue("l" in R)
  assertTrue("l" in RR)
  assertTrue("l" in M)
  assertTrue("l" in MM)
  assertTrue("l" in F)
  assertTrue("l" in G)
  assertTrue("c" in R)
  assertTrue("c" in RR)
  assertTrue("c" in M)
  assertTrue("c" in MM)
  assertTrue("c" in F)
  assertTrue("c" in G)
  assertTrue("f" in R)
  assertTrue("f" in RR)
  assertTrue("f" in M)
  assertTrue("f" in MM)
  assertTrue("f" in F)
  assertTrue("f" in G)
  assertTrue("M" in R)
  assertTrue("M" in RR)
  assertTrue("RR" in R)
  assertTrue("RR" in RR)

  // And aliases should be identical.
  assertSame(R, RR)
  assertSame(R, R.RR)
  assertSame(M, R.M)
  assertSame(M, G)

  // We can only assign to var.
  assertEquals(-1, v = -1)
  assertEquals(-2, R.v = -2)
  assertEquals(-2, v)
  assertEquals(-2, R.v)

  assertThrows(function() { l = -1 }, ReferenceError)
  assertThrows(function() { R.l = -2 }, ReferenceError)
  assertThrows(function() { l }, ReferenceError)
  assertThrows(function() { R.l }, ReferenceError)

  assertThrows(function() { eval("c = -1") }, TypeError)
  assertThrows(function() { R.c = -2 }, TypeError)

  // Initialize first bunch of variables.
  export var v = 1
  export let l = 2
  export const c = 3
  export function f() { return 4 }

  assertEquals(1, v)
  assertEquals(1, R.v)
  assertEquals(2, l)
  assertEquals(2, R.l)
  assertEquals(3, c)
  assertEquals(3, R.c)

  assertEquals(-3, v = -3)
  assertEquals(-4, R.v = -4)
  assertEquals(-3, l = -3)
  assertEquals(-4, R.l = -4)
  assertThrows(function() { eval("c = -3") }, TypeError)
  assertThrows(function() { R.c = -4 }, TypeError)

  assertEquals(-4, v)
  assertEquals(-4, R.v)
  assertEquals(-4, l)
  assertEquals(-4, R.l)
  assertEquals(3, c)
  assertEquals(3, R.c)

  // Initialize nested module.
  export module M {
    export var v = 11
    export let l = 12
    export const c = 13
    export function f() { return 14 }
  }

  assertEquals(11, M.v)
  assertEquals(11, G.v)
  assertEquals(12, M.l)
  assertEquals(12, G.l)
  assertEquals(13, M.c)
  assertEquals(13, G.c)

  // Initialize non-exported variables.
  var vv = 21
  let ll = 22
  const cc = 23
  function ff() { return 24 }

  assertEquals(21, vv)
  assertEquals(22, ll)
  assertEquals(23, cc)

  // Initialize non-exported module.
  module MM {
    export var v = 31
    export let l = 32
    export const c = 33
    export function f() { return 34 }
  }

  assertEquals(31, MM.v)
  assertEquals(32, MM.l)
  assertEquals(33, MM.c)

  // Recursive self reference.
  export module RR = R
}

// Initialize sibling module that was forward-used.
module F {
  assertEquals(undefined, v)
  assertEquals(undefined, F.v)
  assertThrows(function() { l }, ReferenceError)
  assertThrows(function() { F.l }, ReferenceError)
  assertThrows(function() { c }, ReferenceError)
  assertThrows(function() { F.c }, ReferenceError)

  export var v = 41
  export let l = 42
  export const c = 43
  export function f() { return 44 }

  assertEquals(41, v)
  assertEquals(41, F.v)
  assertEquals(42, l)
  assertEquals(42, F.l)
  assertEquals(43, c)
  assertEquals(43, F.c)
}

// Define recursive module alias.
module G = R.M



// Second test with side effects and more module nesting.

let log = "";

export let x = (log += "1");

export module B = A.B

export module A {
  export let x = (log += "2");
  let y = (log += "3");
  export function f() { log += "5" };
  export module B {
    module BB = B;
    export BB, x;
    let x = (log += "4");
    f();
    let y = (log += "6");
  }
  export let z = (log += "7");
  export module C {
    export let z = (log += "8");
    export module D = B
    export module C = A.C
  }
  module D {}
}

export module M1 {
  export module A2 = M2;
  export let x = (log += "9");
}
export module M2 {
  export module A1 = M1;
  export let x = (log += "0");
}

assertEquals("object", typeof A);
assertTrue('x' in A);
assertFalse('y' in A);
assertTrue('f' in A);
assertTrue('B' in A);
assertTrue('z' in A);
assertTrue('C' in A);
assertFalse('D' in A);

assertEquals("object", typeof B);
assertTrue('BB' in B);
assertTrue('x' in B);
assertFalse('y' in B);

assertEquals("object", typeof A.B);
assertTrue('BB' in A.B);
assertTrue('x' in A.B);
assertFalse('y' in A.B);

assertEquals("object", typeof A.B.BB);
assertTrue('BB' in A.B.BB);
assertTrue('x' in A.B.BB);
assertFalse('y' in A.B.BB);

assertEquals("object", typeof A.C);
assertTrue('z' in A.C);
assertTrue('D' in A.C);
assertTrue('C' in A.C);

assertEquals("object", typeof M1);
assertEquals("object", typeof M2);
assertTrue('A2' in M1);
assertTrue('A1' in M2);
assertEquals("object", typeof M1.A2);
assertEquals("object", typeof M2.A1);
assertTrue('A1' in M1.A2);
assertTrue('A2' in M2.A1);
assertEquals("object", typeof M1.A2.A1);
assertEquals("object", typeof M2.A1.A2);

assertSame(B, A.B);
assertSame(B, B.BB);
assertSame(B, A.C.D);
assertSame(A.C, A.C.C);
assertFalse(A.D === A.C.D);

assertSame(M1, M2.A1);
assertSame(M2, M1.A2);
assertSame(M1, M1.A2.A1);
assertSame(M2, M2.A1.A2);

assertEquals("1234567890", log);