Patter Matching in Dynamic Script in response

I have a type defined in xsd as


<xs:simpleType name="Test_Type">
<xs:restriction base="xs:string">
<xs:annotation>
</xs:annotation>
<xs:pattern value="[0-9]{1,10}"/>
</xs:restriction>
</xs:simpleType>


I am trying to create a dynamic response through the script

Something like

context.testStoreId='9000015';

and using it in my response as

<v41:TestStoreId>${testStoreId}</v41:TestStoreId>

I am getting this error

line 10: string value '${testStoreId}' does not match pattern forTest_Type in namespace http://ecc.pdxinc.com/webservice/TestIn ... ice/xsd/v4