1 files changed, 66 insertions, 0 deletions
diff --git a/js/src/tests/non262/Date/parse-milliseconds.js b/js/src/tests/non262/Date/parse-milliseconds.js
new file mode 100644
index 0000000000..ddaa73e4e4
--- /dev/null
+++ b/js/src/tests/non262/Date/parse-milliseconds.js
@@ -0,0 +1,66 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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/. */
+
+const accepted = {
+  "Sep 26 1995 12:34:56.789": "1995-09-26T12:34:56.789",
+  "Sep 26 1995 12:34:56.7": "1995-09-26T12:34:56.700",
+  "Sep 26 1995 12:34:56.78": "1995-09-26T12:34:56.780",
+  "Sep 26 1995 12:34:56.001": "1995-09-26T12:34:56.001",
+
+  "Sep 26 1995 12:34:56.789Z": "1995-09-26T12:34:56.789Z",
+  "Sep 26 1995 12:34:56.789 -0500": "1995-09-26T12:34:56.789-0500",
+  "Sep 26 1995 12:34:56.789-0500": "1995-09-26T12:34:56.789-0500",
+
+  // Note that the trailing '.' without milliseconds is rejected.
+  // Rejecting this case could be done trivially, but Chrome allows it,
+  // so we will allow it for parity.
+  "Sep 26 1995 12:34:56.789.": "1995-09-26T12:34:56.789",
+
+  // Truncate after 3 digits
+  "Sep 26 1995 12:34:56.0001": "1995-09-26T12:34:56",
+  "Sep 26 1995 12:34:56.0009": "1995-09-26T12:34:56",
+  "Sep 26 1995 12:34:56.999": "1995-09-26T12:34:56.999",
+  "Sep 26 1995 12:34:56.9990": "1995-09-26T12:34:56.999",
+  "Sep 26 1995 12:34:56.9999": "1995-09-26T12:34:56.999",
+  // Before bug 746529, it would have rounded up here:
+  "Sep 26 1995 12:34:56.99999999999999996": "1995-09-26T12:34:56.999",
+  "Sep 26 1995 12:34:56.50099999999999996": "1995-09-26T12:34:56.500",
+  "Sep 26 1995 12:34:56.00099999999999996": "1995-09-26T12:34:56",
+  "Sep 26 1995 12:34:56.000999999999999999999": "1995-09-26T12:34:56",
+};
+const rejected = [
+  "Sep 26 1995 12:34:56.",
+  "Sep 26 1995 12:34:56:789",
+  "Sep 26 1995 12:34:56..789",
+];
+
+// Sanity check to make sure these are being parsed to the right precision
+// Otherwise, the comparisons in the above object could still pass
+assertEq(Date.parse("1970-01-01T00:00:00.99999999999999996Z"), 999);
+
+for (const [test, expected] of Object.entries(accepted)) {
+  const testDate = new Date(test);
+  const expectedDate = new Date(expected);
+
+  assertEq(
+    false, isNaN(testDate),
+    `${test} should be accepted.`
+  );
+
+  assertEq(
+    testDate.getTime(), expectedDate.getTime(),
+    `"${test}" should be ${expectedDate} (got ${testDate}).`
+  );
+}
+
+for (const reject of rejected) {
+  assertEq(
+    true, isNaN(new Date(reject)),
+    `"${reject}" should be rejected.`
+  );
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);