1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/object-keys-01.js b/js/src/jit-test/tests/ion/object-keys-01.js
new file mode 100644
index 0000000000..feb053f327
--- /dev/null
+++ b/js/src/jit-test/tests/ion/object-keys-01.js
@@ -0,0 +1,36 @@
+
+// This test case is used to test one common configuration seen in the wild and
+// that we expect to be successful at optimizing properly.
+
+// Similar functions are part of popular framework such as React and Angular.
+function shallowEqual(o1, o2) {
+    var k1 = Object.keys(o1);
+    var k2 = Object.keys(o2);
+    if (k1.length != k2.length) {
+        return false;
+    }
+    for (var k = 0; k < k1.length; k++) {
+        if (!Object.hasOwnProperty.call(o2, k1[k]) || !Object.is(o1[k1[k]], o2[k1[k]])) {
+            return false;
+        }
+    }
+    return true;
+}
+
+let objs = [
+    {x:0, a: 1, b: 2},
+    {x:1, b: 1, c: 2},
+    {x:2, c: 1, d: 2},
+    {x:3, a: 1, b: 2, c: 3},
+    {x:4, b: 1, c: 2, d: 3},
+    {x:5, a: 1, b: 2, c: 3, d: 4}
+];
+
+with({}) {}
+for (let i = 0; i < 1000; i++) {
+    for (let o1 of objs) {
+        for (let o2 of objs) {
+            assertEq(shallowEqual(o1, o2), Object.is(o1, o2));
+        }
+    }
+}