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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
var Ci = Components.interfaces;
var Cr = Components.results;
var Cc = Components.classes;
var CC = Components.Constructor;
var MutableArray = CC("@mozilla.org/array;1", "nsIMutableArray");
var SupportsString = CC("@mozilla.org/supports-string;1", "nsISupportsString");
function create_n_element_array(n)
{
var arr = new MutableArray();
for (let i=0; i<n; i++) {
let str = new SupportsString();
str.data = "element " + i;
arr.appendElement(str, false);
}
return arr;
}
function test_appending_null_actually_inserts()
{
var arr = new MutableArray();
do_check_eq(0, arr.length);
arr.appendElement(null, false);
do_check_eq(1, arr.length);
}
function test_object_gets_appended()
{
var arr = new MutableArray();
var str = new SupportsString();
str.data = "hello";
arr.appendElement(str, false);
do_check_eq(1, arr.length);
var obj = arr.queryElementAt(0, Ci.nsISupportsString);
do_check_eq(str, obj);
}
function test_insert_at_beginning()
{
var arr = create_n_element_array(5);
// just a sanity check
do_check_eq(5, arr.length);
var str = new SupportsString();
str.data = "hello";
arr.insertElementAt(str, 0, false);
do_check_eq(6, arr.length);
var obj = arr.queryElementAt(0, Ci.nsISupportsString);
do_check_eq(str, obj);
// check the data of all the other objects
for (let i=1; i<arr.length; i++) {
let obj = arr.queryElementAt(i, Ci.nsISupportsString);
do_check_eq("element " + (i-1), obj.data);
}
}
function test_replace_element()
{
var arr = create_n_element_array(5);
// just a sanity check
do_check_eq(5, arr.length);
var str = new SupportsString();
str.data = "hello";
// replace first element
arr.replaceElementAt(str, 0, false);
do_check_eq(5, arr.length);
var obj = arr.queryElementAt(0, Ci.nsISupportsString);
do_check_eq(str, obj);
// replace last element
arr.replaceElementAt(str, arr.length - 1, false);
do_check_eq(5, arr.length);
obj = arr.queryElementAt(arr.length - 1, Ci.nsISupportsString);
do_check_eq(str, obj);
// replace after last element, should insert empty elements
arr.replaceElementAt(str, 9, false);
do_check_eq(10, arr.length);
obj = arr.queryElementAt(9, Ci.nsISupportsString);
do_check_eq(str, obj);
// AFAIK there's no way to check the empty elements, since you can't QI them.
}
function test_clear()
{
var arr = create_n_element_array(5);
// just a sanity check
do_check_eq(5, arr.length);
arr.clear();
do_check_eq(0, arr.length);
}
function test_enumerate()
{
var arr = create_n_element_array(5);
do_check_eq(5, arr.length);
var en = arr.enumerate();
var i = 0;
while (en.hasMoreElements()) {
let str = en.getNext();
do_check_true(str instanceof Ci.nsISupportsString);
do_check_eq(str.data, "element " + i);
i++;
}
do_check_eq(arr.length, i);
}
function test_nssupportsarray_interop() {
// Tests to check that an nsSupportsArray instance can behave like an
// nsIArray.
let test = Components.classes["@mozilla.org/supports-array;1"]
.createInstance(Ci.nsISupportsArray);
let str = new SupportsString();
str.data = "element";
test.AppendElement(str);
// Now query to an nsIArray.
let iarray = test.QueryInterface(Ci.nsIArray);
do_check_neq(iarray, null);
// Make sure |nsIArray.length| works.
do_check_eq(iarray.length, 1);
// Make sure |nsIArray.queryElementAt| works.
let elm = iarray.queryElementAt(0, Ci.nsISupportsString);
do_check_eq(elm.data, "element");
// Make sure |nsIArray.indexOf| works.
let idx = iarray.indexOf(0, str);
do_check_eq(idx, 0);
// Make sure |nsIArray.enumerate| works.
let en = iarray.enumerate();
do_check_neq(en, null);
let i = 0;
while (en.hasMoreElements()) {
let str = en.getNext();
do_check_true(str instanceof Ci.nsISupportsString);
do_check_eq(str.data, "element");
i++;
}
do_check_eq(iarray.length, i);
}
function test_nsiarrayextensions() {
// Tests to check that the extensions that make an nsArray act like an
// nsISupportsArray for iteration purposes works.
// Note: we do not want to QI here, just want to make sure the magic glue
// works as a drop-in replacement.
let fake_nsisupports_array = create_n_element_array(5);
// Check that |Count| works.
do_check_eq(5, fake_nsisupports_array.Count());
for (let i = 0; i < fake_nsisupports_array.Count(); i++) {
// Check that the generic |GetElementAt| works.
let elm = fake_nsisupports_array.GetElementAt(i);
do_check_neq(elm, null);
let str = elm.QueryInterface(Ci.nsISupportsString);
do_check_neq(str, null);
do_check_eq(str.data, "element " + i);
}
}
var tests = [
test_appending_null_actually_inserts,
test_object_gets_appended,
test_insert_at_beginning,
test_replace_element,
test_clear,
test_enumerate,
test_nssupportsarray_interop,
test_nsiarrayextensions,
];
function run_test() {
for (var i = 0; i < tests.length; i++)
tests[i]();
}
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