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-rw-r--r--js/src/jit-test/tests/arrays/pop-nonwritable-length-denseinitializedlength-below-length.js49
1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arrays/pop-nonwritable-length-denseinitializedlength-below-length.js b/js/src/jit-test/tests/arrays/pop-nonwritable-length-denseinitializedlength-below-length.js
new file mode 100644
index 000000000..9330f775b
--- /dev/null
+++ b/js/src/jit-test/tests/arrays/pop-nonwritable-length-denseinitializedlength-below-length.js
@@ -0,0 +1,49 @@
+load(libdir + "asserts.js");
+
+function f(arr)
+{
+ assertEq(arr.pop(), undefined); // if it doesn't throw
+}
+
+var N = 100;
+
+function basic(out)
+{
+ // Create an array of arrays, to be iterated over for [].pop-calling. We
+ // can't just loop on pop on a single array with non-writable length because
+ // pop throws when called on an array with non-writable length.
+ var arrs = out.arrs = [];
+ for (var i = 0; i < N; i++)
+ {
+ var arr = [0, 1, 2, 3, 4];
+ arr.length = 6;
+ arrs.push(arr);
+ }
+
+ var a = [0, 1, 2, 3, 4];
+ Object.defineProperty(a, "length", { writable: false, value: 6 });
+
+ arrs.push(a);
+
+ for (var i = 0, sz = arrs.length; i < sz; i++)
+ f(arrs[i]);
+}
+
+var obj = {};
+var arrs, a;
+
+assertThrowsInstanceOf(function() { basic(obj); }, TypeError);
+
+var arrs = obj.arrs;
+assertEq(arrs.length, N + 1);
+for (var i = 0; i < N; i++)
+{
+ assertEq(arrs[i].length, 5, "unexpected length for arrs[" + i + "]");
+ assertEq(arrs[i].hasOwnProperty(5), false,
+ "element not deleted for arrs[" + i + "]");
+}
+
+var a = arrs[N];
+assertEq(a.hasOwnProperty(5), false);
+assertEq(a[5], undefined);
+assertEq(a.length, 6);