1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/BigInt/constructor-coercion.js b/js/src/tests/test262/built-ins/BigInt/constructor-coercion.js
new file mode 100644
index 0000000000..8275c5b1ab
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+++ b/js/src/tests/test262/built-ins/BigInt/constructor-coercion.js
@@ -0,0 +1,29 @@
+// Copyright (C) 2022 Kevin Gibbons. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: BigInt constructor only coerces its input once
+esid: sec-bigint-constructor-number-value
+info: |
+  BigInt ( value )
+    1. If NewTarget is not undefined, throw a TypeError exception.
+    2. Let prim be ? ToPrimitive(value, number).
+    3. If Type(prim) is Number, return ? NumberToBigInt(prim).
+    4. Otherwise, return ? ToBigInt(prim).
+features: [BigInt]
+---*/
+
+var first = true;
+var v = {
+  [Symbol.toPrimitive]: function() {
+    if (first) {
+      first = false;
+      return "42";
+    }
+    throw new Test262Error("Symbol.toPrimitive should only be invoked once");
+  },
+};
+
+assert.sameValue(BigInt(v), 42n, "BigInt constructor should use the post-ToPrimitive value as the argument to ToBigInt");
+
+reportCompare(0, 0);