1 files changed, 34 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/with/BigInt/early-type-coercion-bigint.js b/js/src/tests/test262/built-ins/TypedArray/prototype/with/BigInt/early-type-coercion-bigint.js
new file mode 100644
index 0000000000..0c32af8a93
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/with/BigInt/early-type-coercion-bigint.js
@@ -0,0 +1,34 @@
+// |reftest| shell-option(--enable-change-array-by-copy) skip-if(!Array.prototype.with||!xulRuntime.shell) -- change-array-by-copy is not enabled unconditionally, requires shell-options
+// Copyright (C) 2021 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-%typedarray%.prototype.with
+description: >
+  %TypedArray%.prototype.with invokes ToNumber before copying
+info: |
+  %TypedArray%.prototype.with ( index, value )
+
+  ...
+  7. If _O_.[[ContentType]] is ~BigInt~, set _value_ to ? ToBigInt(_value_).
+  8. Else, set _value_ to ? ToNumber(_value_).
+  ...
+features: [BigInt, TypedArray, change-array-by-copy]
+includes: [testBigIntTypedArray.js, compareArray.js]
+---*/
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+  var arr = new TA([0n, 1n, 2n]);
+
+  var value = {
+    valueOf() {
+      arr[0] = 3n;
+      return 4n;
+    }
+  };
+
+  assert.compareArray(arr.with(1, value), [3n, 4n, 2n]);
+  assert.compareArray(arr, [3n, 1n, 2n]);
+});
+
+reportCompare(0, 0);