/* 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 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);
} return arr;
}
function test_appending_null_actually_inserts() { var arr = new MutableArray(); Assert.equal(0, arr.length);
arr.appendElement(null); Assert.equal(1, arr.length);
}
function test_object_gets_appended() { var arr = new MutableArray(); var str = new SupportsString();
str.data = "hello";
arr.appendElement(str); Assert.equal(1, arr.length); var obj = arr.queryElementAt(0, Ci.nsISupportsString); Assert.equal(str, obj);
}
function test_insert_at_beginning() { var arr = create_n_element_array(5); // just a sanity check Assert.equal(5, arr.length); var str = new SupportsString();
str.data = "hello";
arr.insertElementAt(str, 0); Assert.equal(6, arr.length); var obj = arr.queryElementAt(0, Ci.nsISupportsString); Assert.equal(str, obj); // check the data of all the other objects for (let i = 1; i < arr.length; i++) {
let obj2 = arr.queryElementAt(i, Ci.nsISupportsString); Assert.equal("element " + (i - 1), obj2.data);
}
}
function test_replace_element() { var arr = create_n_element_array(5); // just a sanity check Assert.equal(5, arr.length); var str = new SupportsString();
str.data = "hello"; // replace first element
arr.replaceElementAt(str, 0); Assert.equal(5, arr.length); var obj = arr.queryElementAt(0, Ci.nsISupportsString); Assert.equal(str, obj); // replace last element
arr.replaceElementAt(str, arr.length - 1); Assert.equal(5, arr.length);
obj = arr.queryElementAt(arr.length - 1, Ci.nsISupportsString); Assert.equal(str, obj); // replace after last element, should insert empty elements
arr.replaceElementAt(str, 9); Assert.equal(10, arr.length);
obj = arr.queryElementAt(9, Ci.nsISupportsString); Assert.equal(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 Assert.equal(5, arr.length);
arr.clear(); Assert.equal(0, arr.length);
}
function test_enumerate() { var arr = create_n_element_array(5); Assert.equal(5, arr.length); var i = 0; for (let str of arr.enumerate()) { Assert.ok(str instanceof Ci.nsISupportsString); Assert.equal(str.data, "element " + i);
i++;
} Assert.equal(arr.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. Assert.equal(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); Assert.notEqual(elm, null);
let str = elm.QueryInterface(Ci.nsISupportsString); Assert.notEqual(str, null); Assert.equal(str.data, "element " + i);
}
}
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