1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Date/parse/year-zero.js b/js/src/tests/test262/built-ins/Date/parse/year-zero.js
new file mode 100644
index 0000000000..f04147e590
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Date/parse/year-zero.js
@@ -0,0 +1,22 @@
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-expanded-years
+description: Negative zero, as an extended year, is rejected
+info: |
+  The year 0 is considered positive and must be prefixed with a + sign. The
+  representation of the year 0 as -000000 is invalid.
+---*/
+
+const invalidStrings = [
+  "-000000-03-31T00:45Z",
+  "-000000-03-31T01:45",
+  "-000000-03-31T01:45:00+01:00"
+];
+
+for (const str of invalidStrings) {
+  assert.sameValue(Date.parse(str), NaN, "reject minus zero as extended year");
+}
+
+reportCompare(0, 0);