Split test assignments

<script>
(function() {
    // Ensure `window._uxa` is initialized
    window._uxa = window._uxa || [];

    // Function to push a single trackDynamicVariable entry to `window._uxa`
    function generateUxaTrackVariables(assignments) {
        for (var testId in assignments) {
            if (assignments.hasOwnProperty(testId)) {
                var assignment = assignments[testId];
                
                // Ensure each assignment has both `test_id` and `test_group` properties
                if (assignment.test_id && assignment.test_group) {
                    var test_id_value = assignment.test_id;
                    var test_group_value = assignment.test_group;

                    // Construct the dynamic key
                    var key = "split_test_id_" + test_id_value;

                    // Push a single `trackDynamicVariable` entry to `window._uxa`
                    window._uxa.push(["trackDynamicVariable", { key: key, value: test_group_value }]);
                }
            }
        }
    }

    // Check if `split_test_assignments` exists and is an object
    if (typeof split_test_assignments === "object" && split_test_assignments !== null) {
        // Call the function with split test assignments data
        generateUxaTrackVariables(split_test_assignments);
    }
})();
</script>