1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/indexOf/searchstring-tostring-bigint.js b/js/src/tests/test262/built-ins/String/prototype/indexOf/searchstring-tostring-bigint.js
new file mode 100644
index 0000000000..42b59ffef2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/String/prototype/indexOf/searchstring-tostring-bigint.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2017 Josh Wolfe. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+description: String.prototype.indexOf type coercion for searchString parameter
+esid: sec-string.prototype.indexof
+info: |
+  String.prototype.indexOf ( searchString [ , position ] )
+
+  3. Let searchStr be ? ToString(searchString).
+features: [BigInt, Symbol.toPrimitive, computed-property-names]
+---*/
+
+assert.sameValue("__0__".indexOf(0n), 2, "ToString: BigInt to String");
+assert.sameValue("__0__".indexOf(Object(0n)), 2,
+  "ToString: unbox object with internal slot => BigInt to String");
+assert.sameValue("__0__".indexOf({
+  [Symbol.toPrimitive]: function() {
+    return 0n;
+  }
+}), 2, "ToString: @@toPrimitive => BigInt to String");
+assert.sameValue("__0__".indexOf({
+  valueOf: function() {
+    return 0n;
+  },
+  toString: null
+}), 2, "ToString: valueOf => BigInt to String");
+assert.sameValue("__0__".indexOf({
+  toString: function() {
+    return 0n;
+  }
+}), 2, "ToString: toString => BigInt to String");
+
+reportCompare(0, 0);