[elements] Add more tests to increase coverage

test/mjsunit/array-push.js

Index: test/mjsunit/array-push.js
diff --git a/test/mjsunit/array-push.js b/test/mjsunit/array-push.js
index c87fd128e4bd4a19ccf07d6fd293592283726d89..ece3319bc15c57817017aae483ed4189306c12ca 100644
--- a/test/mjsunit/array-push.js
+++ b/test/mjsunit/array-push.js
@@ -146,3 +146,16 @@
   f(a, {});
   assertEquals(10, a.f());
 })();
+
+
+(function testDoubleArrayPush() {
+  var a = [];
+  var max = 1000;
+  for (var i = 0; i < max; i++) {
+    a.push(i + 0.1);
+  }
+  assertEquals(max, a.length);
+  for (var i = 0; i < max; i++) {
+    assertEquals(i+0.1, a[i]);
+  }
+})();