1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/tests/test262/harness/compare-array-falsy-arguments.js b/js/src/tests/test262/harness/compare-array-falsy-arguments.js
new file mode 100644
index 0000000000..1d0354312d
--- /dev/null
+++ b/js/src/tests/test262/harness/compare-array-falsy-arguments.js
@@ -0,0 +1,30 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    compareArray gracefully handles nullish arguments.
+includes: [compareArray.js]
+---*/
+
+function assertThrows(func, errorMessage) {
+    var caught = false;
+    try {
+        func();
+    } catch (error) {
+        caught = true;
+        assert.sameValue(error.constructor, Test262Error);
+        assert.sameValue(error.message, errorMessage);
+    }
+
+    assert(caught, `Expected ${func} to throw, but it didn't.`);
+}
+
+assertThrows(() => assert.compareArray(), "First argument shouldn't be nullish. ");
+assertThrows(() => assert.compareArray(null, []), "First argument shouldn't be nullish. ");
+assertThrows(() => assert.compareArray(null, [], "foo"), "First argument shouldn't be nullish. foo");
+
+assertThrows(() => assert.compareArray([]), "Second argument shouldn't be nullish. ");
+assertThrows(() => assert.compareArray([], undefined, "foo"), "Second argument shouldn't be nullish. foo");
+
+reportCompare(0, 0);