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diff --git a/external/contributions/Microsoft/ietestcenter_ie9_rtm/chapter12/12.6/12.6.4/12.6.4-1.js b/external/contributions/Microsoft/ietestcenter_ie9_rtm/chapter12/12.6/12.6.4/12.6.4-1.js
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+++ b/external/contributions/Microsoft/ietestcenter_ie9_rtm/chapter12/12.6/12.6.4/12.6.4-1.js
@@ -0,0 +1,57 @@
+/// Copyright (c) 2009 Microsoft Corporation 
+/// 
+/// Redistribution and use in source and binary forms, with or without modification, are permitted provided
+/// that the following conditions are met: 
+///    * Redistributions of source code must retain the above copyright notice, this list of conditions and
+///      the following disclaimer. 
+///    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and 
+///      the following disclaimer in the documentation and/or other materials provided with the distribution.  
+///    * Neither the name of Microsoft nor the names of its contributors may be used to
+///      endorse or promote products derived from this software without specific prior written permission.
+/// 
+/// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+/// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+/// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+/// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+/// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+/// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+/// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+/// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+ES5Harness.registerTest({
+    id: "12.6.4-1",
+
+    path: "TestCases/chapter12/12.6/12.6.4/12.6.4-1.js",
+
+    description: "The for-in Statement - a property name must not be visited more than once in any enumeration.",
+
+    test: function testcase() {
+        var obj = { prop1: "abc", prop2: "bbc", prop3: "cnn" };
+
+        var countProp1 = 0;
+        var countProp2 = 0;
+        var countProp3 = 0;
+
+        for (var p in obj) {
+            if (obj.hasOwnProperty(p)) {
+                if (p === "prop1") {
+                    countProp1++;
+                }
+                if (p === "prop2") {
+                    countProp2++;
+                }
+                if (p === "prop3") {
+                    countProp3++;
+                }
+            }
+        }
+        return countProp1 === 1 && countProp2 === 1 && countProp3 === 1;
+    },
+
+
+
+    precondition: function prereq() {
+        return true;
+    }
+});