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-rw-r--r--js/src/jit-test/tests/arrays/push-slowly-loopy-nonwritable-length.js51
1 files changed, 51 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/arrays/push-slowly-loopy-nonwritable-length.js b/js/src/jit-test/tests/arrays/push-slowly-loopy-nonwritable-length.js
new file mode 100644
index 000000000..79d858715
--- /dev/null
+++ b/js/src/jit-test/tests/arrays/push-slowly-loopy-nonwritable-length.js
@@ -0,0 +1,51 @@
+load(libdir + "asserts.js");
+
+function f(arr, v1, v2)
+{
+ // Ensure array_push_slowly is called by passing more than one argument.
+ arr.push(v1, v2);
+}
+
+var N = 100;
+
+function test(out)
+{
+ // Create an array of arrays, to be iterated over for [].push-calling. We
+ // can't just loop on push on a single array with non-writable length because
+ // push throws when called on an array with non-writable length.
+ var arrs = out.arrs = [];
+ for (var i = 0; i < N; i++)
+ arrs.push([]);
+
+ // Use a much-greater capacity than the eventual non-writable length.
+ var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
+ Object.defineProperty(a, "length", { writable: false, value: 6 });
+
+ arrs.push(a);
+
+ for (var i = 0, sz = arrs.length; i < sz; i++)
+ {
+ var arr = arrs[i];
+ f(arr, 8675309, 3141592);
+ }
+}
+
+var obj = {};
+
+assertThrowsInstanceOf(function() { test(obj); }, TypeError);
+
+var arrs = obj.arrs;
+assertEq(arrs.length, N + 1);
+for (var i = 0; i < N; i++)
+{
+ assertEq(arrs[i].length, 2, "unexpected length for arrs[" + i + "]");
+ assertEq(arrs[i][0], 8675309, "bad element for arrs[" + i + "][0]");
+ assertEq(arrs[i][1], 3141592, "bad element for arrs[" + i + "][1]");
+}
+
+var a = arrs[N];
+assertEq(a.hasOwnProperty(6), false);
+assertEq(a[6], undefined);
+assertEq(a.hasOwnProperty(7), false);
+assertEq(a[7], undefined);
+assertEq(a.length, 6);