1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/non262/String/IsRegExp.js b/js/src/tests/non262/String/IsRegExp.js
new file mode 100644
index 0000000000..f8f4d3fb16
--- /dev/null
+++ b/js/src/tests/non262/String/IsRegExp.js
@@ -0,0 +1,24 @@
+var BUGNUMBER = 1054755;
+var summary = 'String.prototype.{startsWith,endsWith,includes} should call IsRegExp.';
+
+print(BUGNUMBER + ": " + summary);
+
+for (var method of ["startsWith", "endsWith", "includes"]) {
+  for (var re of [/foo/, new RegExp()]) {
+    assertThrowsInstanceOf(() => "foo"[method](re), TypeError);
+
+    re[Symbol.match] = false;
+    "foo"[method](re);
+  }
+
+  for (var v1 of [true, 1, "bar", [], {}, Symbol.iterator]) {
+    assertThrowsInstanceOf(() => "foo"[method]({ [Symbol.match]: v1 }), TypeError);
+  }
+
+  for (var v2 of [false, 0, undefined, ""]) {
+    "foo"[method]({ [Symbol.match]: v2 });
+  }
+}
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);