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-rw-r--r--xpcom/tests/unit/test_nsIMutableArray.js131
1 files changed, 131 insertions, 0 deletions
diff --git a/xpcom/tests/unit/test_nsIMutableArray.js b/xpcom/tests/unit/test_nsIMutableArray.js
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+++ b/xpcom/tests/unit/test_nsIMutableArray.js
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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 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);
+ }
+}
+
+var tests = [
+ test_appending_null_actually_inserts,
+ test_object_gets_appended,
+ test_insert_at_beginning,
+ test_replace_element,
+ test_clear,
+ test_enumerate,
+ test_nsiarrayextensions,
+];
+
+function run_test() {
+ for (var i = 0; i < tests.length; i++) {
+ tests[i]();
+ }
+}