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bug 455503 - better tests for nsIMutableArray. r=bsmedberg

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This commit is contained in:
Ted Mielczarek 2008-09-22 06:41:55 -04:00
parent a010a5b6a7
commit 086eaca58f
1 changed files with 99 additions and 1 deletions
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100
xpcom/tests/unit/test_nsIMutableArray.js
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@ -38,17 +38,115 @@
const Ci = Components.interfaces;
const Cr = Components.results;
const Cc = Components.classes;
const 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 = Cc["@mozilla.org/array;1"].createInstance(Ci.nsIMutableArray);
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);
}
var tests = [
test_appending_null_actually_inserts,
test_object_gets_appended,
test_insert_at_beginning,
test_replace_element,
test_clear,
test_enumerate,
];
function run_test() {