1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/non262/Iterator/prototype/take-drop-throw-eagerly-on-negative.js b/js/src/tests/non262/Iterator/prototype/take-drop-throw-eagerly-on-negative.js
new file mode 100644
index 0000000000..b870e31e72
--- /dev/null
+++ b/js/src/tests/non262/Iterator/prototype/take-drop-throw-eagerly-on-negative.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Iterator'))
+
+//
+//
+/*---
+esid: pending
+description: `take` and `drop` throw eagerly when passed negative numbers, after rounding towards 0.
+info: >
+  Iterator Helpers proposal 2.1.5.4 and 2.1.5.5
+features: [iterator-helpers]
+---*/
+
+const iter = [].values();
+const methods = [
+  value => iter.take(value),
+  value => iter.drop(value),
+];
+
+for (const method of methods) {
+  assertThrowsInstanceOf(() => method(-1), RangeError);
+  assertThrowsInstanceOf(() => method(-Infinity), RangeError);
+
+  method(NaN);
+  method(-NaN);
+  method(-0);
+  method(-0.9);
+}
+
+if (typeof reportCompare == 'function')
+  reportCompare(0, 0);