test_utils_deferGetSet.js

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_(

  "Make sure various combinations of deferGetSet arguments correctly defer getting/setting properties to another object"

);

function run_test() {

  let base = function () {};

  base.prototype = {

    dst: {},

    get a() {

      return "a";

},

    set b(val) {

      this.dst.b = val + "!!!";

},

};

  let src = new base();

  _("get/set a single property");

  Utils.deferGetSet(base, "dst", "foo");

  src.foo = "bar";

  Assert.equal(src.dst.foo, "bar");

  Assert.equal(src.foo, "bar");

  _("editing the target also updates the source");

  src.dst.foo = "baz";

  Assert.equal(src.dst.foo, "baz");

  Assert.equal(src.foo, "baz");

  _("handle multiple properties");

  Utils.deferGetSet(base, "dst", ["p1", "p2"]);

  src.p1 = "v1";

  src.p2 = "v2";

  Assert.equal(src.p1, "v1");

  Assert.equal(src.dst.p1, "v1");

  Assert.equal(src.p2, "v2");

  Assert.equal(src.dst.p2, "v2");

  _("make sure existing getter keeps its functionality");

  Utils.deferGetSet(base, "dst", "a");

  src.a = "not a";

  Assert.equal(src.dst.a, "not a");

  Assert.equal(src.a, "a");

  _("make sure existing setter keeps its functionality");

  Utils.deferGetSet(base, "dst", "b");

  src.b = "b";

  Assert.equal(src.dst.b, "b!!!");

  Assert.equal(src.b, "b!!!");