зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
3.2 KiB
JavaScript
123 строки
3.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const Ci = Components.interfaces;
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const Cr = Components.results;
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const Cc = Components.classes;
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const CC = Components.Constructor;
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var MutableArray = CC("@mozilla.org/array;1", "nsIMutableArray");
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var SupportsString = CC("@mozilla.org/supports-string;1", "nsISupportsString");
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function create_n_element_array(n)
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{
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var arr = new MutableArray();
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for (let i=0; i<n; i++) {
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let str = new SupportsString();
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str.data = "element " + i;
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arr.appendElement(str, false);
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}
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return arr;
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}
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function test_appending_null_actually_inserts()
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{
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var arr = new MutableArray();
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do_check_eq(0, arr.length);
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arr.appendElement(null, false);
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do_check_eq(1, arr.length);
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}
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function test_object_gets_appended()
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{
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var arr = new MutableArray();
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var str = new SupportsString();
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str.data = "hello";
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arr.appendElement(str, false);
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do_check_eq(1, arr.length);
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var obj = arr.queryElementAt(0, Ci.nsISupportsString);
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do_check_eq(str, obj);
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}
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function test_insert_at_beginning()
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{
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var arr = create_n_element_array(5);
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// just a sanity check
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do_check_eq(5, arr.length);
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var str = new SupportsString();
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str.data = "hello";
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arr.insertElementAt(str, 0, false);
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do_check_eq(6, arr.length);
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var obj = arr.queryElementAt(0, Ci.nsISupportsString);
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do_check_eq(str, obj);
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// check the data of all the other objects
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for (let i=1; i<arr.length; i++) {
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let obj = arr.queryElementAt(i, Ci.nsISupportsString);
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do_check_eq("element " + (i-1), obj.data);
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}
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}
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function test_replace_element()
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{
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var arr = create_n_element_array(5);
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// just a sanity check
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do_check_eq(5, arr.length);
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var str = new SupportsString();
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str.data = "hello";
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// replace first element
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arr.replaceElementAt(str, 0, false);
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do_check_eq(5, arr.length);
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var obj = arr.queryElementAt(0, Ci.nsISupportsString);
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do_check_eq(str, obj);
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// replace last element
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arr.replaceElementAt(str, arr.length - 1, false);
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do_check_eq(5, arr.length);
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obj = arr.queryElementAt(arr.length - 1, Ci.nsISupportsString);
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do_check_eq(str, obj);
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// replace after last element, should insert empty elements
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arr.replaceElementAt(str, 9, false);
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do_check_eq(10, arr.length);
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obj = arr.queryElementAt(9, Ci.nsISupportsString);
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do_check_eq(str, obj);
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// AFAIK there's no way to check the empty elements, since you can't QI them.
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}
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function test_clear()
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{
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var arr = create_n_element_array(5);
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// just a sanity check
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do_check_eq(5, arr.length);
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arr.clear();
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do_check_eq(0, arr.length);
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}
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function test_enumerate()
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{
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var arr = create_n_element_array(5);
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do_check_eq(5, arr.length);
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var en = arr.enumerate();
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var i = 0;
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while (en.hasMoreElements()) {
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let str = en.getNext();
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do_check_true(str instanceof Ci.nsISupportsString);
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do_check_eq(str.data, "element " + i);
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i++;
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}
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do_check_eq(arr.length, i);
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}
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var tests = [
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test_appending_null_actually_inserts,
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test_object_gets_appended,
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test_insert_at_beginning,
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test_replace_element,
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test_clear,
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test_enumerate,
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];
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function run_test() {
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for (var i = 0; i < tests.length; i++)
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tests[i]();
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}
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