WSo2 Unit Test Example Calculator Validation Sequence

UnitTestExample_Validation_Sequence.xml

<?xml version="1.0" encoding="UTF-8"?>
<sequence name="UnitTestExample_Validation_Sequence" trace="disable" xmlns="http://ws.apache.org/ns/synapse">
    <property description="Get Number1 Value" expression="$ctx:uri.var.number1" name="number1_value" scope="default" type="STRING"/>
    <property description="Get Number2 value" expression="$ctx:uri.var.number2" name="number2_value" scope="default" type="STRING"/>
    <property name="VALIDATION_RESULT" scope="default" type="STRING" value="SUCCESS"/>
    <filter regex="NaN" source="string(number($ctx:number1_value))">
        <then>
            <property name="VALIDATION_RESULT" scope="default" type="STRING" value="FAILURE"/>
            <property name="VAL_ERROR_MESSAGE" scope="default" type="STRING" value="number1 parameter is not a number"/>
        </then>
        <else/>
    </filter>
    <filter regex="NaN" source="string(number($ctx:number2_value))">
        <then>
            <property name="VALIDATION_RESULT" scope="default" type="STRING" value="FAILURE"/>
            <property name="VAL_ERROR_MESSAGE" scope="default" type="STRING" value="number2 parameter is not a number"/>
        </then>
        <else/>
    </filter>
</sequence>