1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/harness/compare-array-sparse.js b/js/src/tests/test262/harness/compare-array-sparse.js
new file mode 100644
index 0000000000..cbfa79d425
--- /dev/null
+++ b/js/src/tests/test262/harness/compare-array-sparse.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: >
+    Spares arrays are only equivalent if they have the same length.
+includes: [compareArray.js]
+---*/
+
+
+assert.compareArray([,], [,], 'Sparse arrays of the same length are equivalent.');
+assert.throws(Test262Error, () => {
+  assert.compareArray([,], [,,]);
+}, 'Sparse arrays of differing lengths are not equivalent.');
+assert.throws(Test262Error, () => {
+  assert.compareArray([,,], [,]);
+}, 'Sparse arrays of differing lengths are not equivalent.');
+assert.throws(Test262Error, () => {
+  assert.compareArray([,], []);
+}, 'Sparse arrays are not equivalent to empty arrays.');
+assert.throws(Test262Error, () => {
+  assert.compareArray([], [,]);
+}, 'Sparse arrays are not equivalent to empty arrays.');
+
+reportCompare(0, 0);