JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / tests / stress / modify-map-during-iteration.js

diff --git a/tests/stress/modify-map-during-iteration.js b/tests/stress/modify-map-during-iteration.js
new file mode 100644 (file)
index 0000000..6261689
--- /dev/null
+++ b/tests/stress/modify-map-during-iteration.js
@@ -0,0 +1,97 @@
+
+function testValue(value, expected) {
+    if (value !== expected)
+        throw new Error("bad value: expected:(" + expected + "),actual:(" + value +").");
+}
+
+function identityPairs(array) {
+    return array.map(function (i) { return [i, i]; });
+}
+
+var map = new Map(identityPairs([0]));
+var counter = 0;
+for (var [elm, _] of map) {
+    testValue(elm, counter);
+    map.set(elm + 1, elm + 1);
+    if (elm > 10000) {
+        map.clear();
+    }
+    ++counter;
+}
+testValue(counter, 10002);
+
+var map = new Map(identityPairs([0, 1, 2, 3]));
+var counter = 0;
+for (var [elm, _] of map) {
+    testValue(elm, counter);
+    map.clear();
+    ++counter;
+}
+testValue(counter, 1);
+
+var map = new Map(identityPairs([0, 1, 2, 3]));
+var exp = [0, 2, 3];
+var counter = 0;
+for (var [elm, _] of map) {
+    testValue(elm, exp[counter]);
+    map.delete(counter + 1);
+    ++counter;
+}
+testValue(counter, 3);
+
+var map = new Map(identityPairs([0, 1, 2, 3]));
+var iter = map.keys();
+var iter2 = map.keys();
+testValue(iter2.next().value, 0);
+
+// Consume all output of iter.
+for (var elm of iter);
+
+testValue(iter.next().done, true);
+testValue(iter.next().value, undefined);
+
+map.clear();
+map.set(1, 1).set(2, 2).set(3, 3);
+
+testValue(iter.next().done, true);
+testValue(iter.next().value, undefined);
+testValue(iter2.next().value, 1);
+testValue(iter2.next().value, 2);
+testValue(iter2.next().value, 3);
+
+var map = new Map();
+map.set(1, 1);
+map.delete(1);
+map.forEach(function (i) {
+    throw new Error("unreeachable.");
+});
+
+var map = new Map();
+var iter = map[Symbol.iterator]();
+map.set(1, 1);
+map.delete(1);
+for (var [elm, _] of map) {
+    throw new Error("unreeachable.");
+}
+
+var map = new Map();
+for (var i = 0; i < 5; ++i)
+    map.set(i, i);
+testValue(map.size, 5);
+var iter = map.keys();
+testValue(iter.next().value, 0);
+testValue(iter.next().value, 1);
+testValue(iter.next().value, 2);
+testValue(iter.next().value, 3);
+map.delete(0);
+map.delete(1);
+map.delete(2);
+map.delete(3);
+// It will cause MapData packing.
+for (var i = 5; i < 1000; ++i)
+    map.set(i, i);
+gc();
+for (var i = 4; i < 1000; ++i)
+    testValue(iter.next().value, i);
+testValue(iter.next().value, undefined);
+