1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/mergeFields/basic.js b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/mergeFields/basic.js
new file mode 100644
index 0000000000..2a9d6abacd
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Temporal/Calendar/prototype/mergeFields/basic.js
@@ -0,0 +1,36 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// Copyright (C) 2022 Igalia S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.mergefields
+description: >
+  Temporal.Calendar.prototype.mergeFields will merge own data properties on its
+  arguments
+info: |
+  1. Let calendar be the this value.
+  2. Perform ? RequireInternalSlot(calendar, [[InitializedTemporalCalendar]]).
+  3. Assert: calendar.[[Identifier]] is "iso8601".
+  4. Set fields to ? ToObject(fields).
+  5. Set additionalFields to ? ToObject(additionalFields).
+  6. Return ? DefaultMergeFields(fields, additionalFields).
+features: [Temporal]
+includes: [deepEqual.js]
+---*/
+
+const cal = new Temporal.Calendar("iso8601");
+
+assert.deepEqual(
+  cal.mergeFields({ a: 1, b: 2 }, { c: 3, d: 4 }),
+  { a: 1, b: 2, c: 3, d: 4 },
+  "properties are merged"
+);
+
+assert.deepEqual(
+  cal.mergeFields({ a: 1, b: 2 }, { b: 3, c: 4 }),
+  { a: 1, b: 3, c: 4 },
+  "property in additionalFields should overwrite one in fields"
+);
+
+reportCompare(0, 0);