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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /xpcom/tests/unit/test_nsIMutableArray.js
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'xpcom/tests/unit/test_nsIMutableArray.js')
-rw-r--r--xpcom/tests/unit/test_nsIMutableArray.js184
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diff --git a/xpcom/tests/unit/test_nsIMutableArray.js 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 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]();
+}