1 files changed, 26 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/temporal/instant-from-epoch-seconds.js b/deps/v8/test/mjsunit/temporal/instant-from-epoch-seconds.js
new file mode 100644
index 0000000000..8fdbd55580
--- /dev/null
+++ b/deps/v8/test/mjsunit/temporal/instant-from-epoch-seconds.js
@@ -0,0 +1,26 @@
+// Copyright 2021 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// Flags: --harmony-temporal
+
+let bigint_nano = 7890123456789000000000n;
+let bigint_sec = 7890123456789n;
+let inst1 = new Temporal.Instant(bigint_nano);
+let inst2 = Temporal.Instant.fromEpochSeconds(bigint_sec);
+assertEquals(inst1, inst2);
+
+let just_fit_neg_bigint = -8640000000000n;
+let just_fit_pos_bigint = 8640000000000n;
+let too_big_bigint = 8640000000001n;
+let too_small_bigint = -8640000000001n;
+
+assertThrows(() =>
+    {let inst = Temporal.Instant.fromEpochSeconds(too_small_bigint)},
+    RangeError)
+assertThrows(() =>
+    {let inst = Temporal.Instant.fromEpochSeconds(too_big_bigint)},
+    RangeError)
+assertEquals(just_fit_neg_bigint,
+    (Temporal.Instant.fromEpochSeconds(just_fit_neg_bigint)).epochSeconds);
+assertEquals(just_fit_pos_bigint,
+    (Temporal.Instant.fromEpochSeconds(just_fit_pos_bigint)).epochSeconds);