This topic explains how to configure and apply the XML Data Bank tool in SOAtest and Virtualize. This tool that extracts XML values (e.g., from a request or response message) so that they can be used in another place. Data can also be sent to a Writable Data Source and accessed in the Extension Tool, or it can be sent to variables for easy reuse across the test suite (SOAtest) or Responder suite or Action suite (Virtualize).

Sections include:

Understanding XML Data Bank

The XML Data Bank tool enables you to extract certain XML values (e.g., from a request or response message) so that they can be used in another place. The XML Data Bank tool can be chained to any other tool that outputs XML. It can extract any information from the XML and make that information available for later use.

For example, you can configure a test suite that tests a bank’s Web service transactions. Test 1 of that test suite can log on to the service using a User ID, then the SOAP response would return a session ID back to Test 1. Test 2 of that test suite can be configured to use the session ID from Test 1 to perform transactions. You can configure any of the tests in a test suite to use SOAP response parameters as SOAP request parameters.

Users typically configure an XML Data Bank by accessing the "Use Data SourceWizard" while parameterizing a value in a tool such as the SOAP Client or Messaging Client tool. This provides a quick, intuitive, and largely automated way to extract data from one tool and use it another. You simply go to the tool where you want to insert extracted data, then use a wizard to specify what data (e.g., from what tool) you want to extract. This is the usage model demonstrated in the Storing Results to Be Used in Subsequent Tests tutorial. This same method can be used to extract data that is used to set a variable. Alternatively, you can manually configure an XML Data Bank tool to extract data from one tool, then manually configure other tools to use the extracted values.

You can also extract a value from an incoming request in Virtualize, for example, and use it to populate an element of the response to be sent when that request is received. You can configure XML Data Banks automatically when using wizards to create virtual assets from traffic. In addition, you can use the "Use Data Source Wizard" to extract a value and use it as a parameterized value in a response. For Message Responders, you can extract values from the incoming request (body or header); for other tools (e.g., tools used in action suites), you can extract values from another tool in the suite. Another option is to manually add an XML Data Bank tool (as an output to an existing tool) that extracts the desired data, then configure other tools to use the extracted data.

Video Tutorial

In this video, you'll learn how to extract values from XML responses and reuse them in other tests.

Configuring XML Data Bank Using the Data Source Wizard

Configuring the Extraction

To use the "Use Data Source Wizard" wizard to configure an XML Data Bank:

  1. (Not applicable for use with Message Responders) Ensure that you have an action set or test suite with at least two tools.

  2. In the configuration panel for the tool that you want use the extracted value, select one of the available Form views.
  3. From the Operation drop-down menu, select the operation that you want to use the extracted value.
  4. In the element view (for example, the id value), go to the message element that you want to use the extracted value, then select Parameterized and Use Data Source Wizard from the available drop-down menus.

  5. In the wizard that opens:
    1. Select the tool you want to extract a value from(for action suite tools). The drop-down menu at the top of the panel will contain all tools in the test or Responder suite that occur before the current tool you are configuring. For example, if you are configuring Tool 4, tools 1, 2, and 3 will display in this menu along with any data sources that may be available.

    2. For Message Responders, select the incoming request message that you want to extract a value from, then specify whether you want to extract values from the message body or message header.

    3. Using the controls on the left side of the panel, indicate what you want to extract and add it to the right side of the panel. The right panel lists the values you have configured for extraction, and shows the name of the data source column where they will be stored (if you keep the default setting).
    4. (Optional) If you want to specify additional options (e.g., if you want to change the name of the column used to store the value, you want the value saved to a writable data source, or you want the value stored to an existing variable) —or if you want to modify advanced XPath settings—then select the appropriate element in table on the right and click Modify. Next, configure the options as needed, then click OK. Available options are described in Options for Each Extracted Element.

Configuring the XML Data Bank Manually

You can also manually chain the XML Data Bank tool to a tool within the Responder, Action, or test suite. To configure the XML Data Bank as a chained tool, complete the following:

  1. (Not applicable for use with Message Responders) Ensure that you have an action set or test suite with at least two tools.

  2. Right-click the node for the tool associated with the data you want to extract(e.g., if you want to extract a value from an incoming request or outgoing response, choose the Message Responder that handles those messages), then choose Add Output.

  3. In the Add Output wizard, indicate where you want to extract the value from (e.g., SOAP Envelope, Incoming Request, Transport Header, Incoming Attachment, Outgoing Response, etc.) and click the Finish button. An XML Data Bank node displays below the tool.

  4. Configure the tool as follows:
    1. Use the available controls to specify the XPaths that indicate what value you want to extract. To add an XPath, select a value from the Expected Message list and click the Extract Element button. The value you added displays in the Selected Element list with a Data Source Column name containing the name of the tool the value came from, as well as the extracted value.

      The left panel displays the expected XML response used to create a template from which you can select elements. If this tool receives a valid XML message (e.g., from traffic or as defined by the client tool it is attached to), this panel will be populated automatically. Alternatively, you can copy a sample message into the Literal or Tree tabs. Note that the expected XML does not get saved by default; if you want to save it, enable the Save Expected XML option.
    2. If you want to further configure the XPath or customize extraction settings for this element, click Modify, then modify it as desired. See Options for Each Extracted Element for details.

    3. Repeat steps a and b as needed to configure any additional extractions you want performed.
    4. In the bottom area of the XML Data Bank configuration panel, customize the options as desired. See Tool-Wide Extraction Options for details.

Using the Extracted Value

After adding and/or modifying the extraction, configure the tool that you want to use the extracted data.

Set the value to Parameterized, and choose the appropriate item from the drop-down. For example, if you saved the value to the "title" data source column, you would select it as follows.

Configuration Options

You can configure the following options when configuring an XML Data Bank:

Options for Each Extracted Element

The following options can be set by modifying a selection listed in the right panel of the XML Data Bank configuration panel.

XPath Options

Data Source Column Options

For headers, you can configure the header name, as well as the data source column options listed above.

Tool-Wide Extraction Options

The following options can be configured in the lower portion of the XML Data Bank tool configuration panel.

Viewing the Data Bank Variables Used During Test Execution

You can configure the Console view (Window> Show View> Console) to display the data bank variables used during test execution. For details, see Monitoring Variable Usage.

Parameterizing XPaths

You can parameterize XPaths to reference Responder suite or test variables, environment variables, and data source values. The syntax to reference variables  is ${myVariableName}. The syntax to reference XML Data Bank values and Data Source values is: ${myColumnName}.

For example, if ${XPath Key} is a data source column name, you could use

/*[local-name(.)="bookstore" and namespace-uri(.)=""]/*[local-name(.)="book"


namespace-uri(.)=""][child::node()[local-name(.)="title" and text()="${XPath Key}"]]

Handling Empty/Missing Elements to Maintain the Integrity of the XML Response

By default, empty and missing elements will not be extracted.  This could impact the integrity of the XML response for use in a Writable Data Source.

For instance, assume you have the following XML:

<?xml version="1.0" encoding="UTF-8"?>

Also assume that you want to create an extraction for all 'e' elements.  To do this, select the first element, then click Extract Element.

Next, select the new extraction, then click Modify.  

In the Modify dialog, change the XPath to extract from /root/e[1]/text() to /root/e/text().

This will extract all three text nodes.

Next, click Data source column and select a writable data source column. When the Data Bank is executed, the writable data source will only contain two rows because the second element is missing text:

ROW 1 = 5
ROW 2 = 6

If you want to write the empty value, change the XPath from /root/e/text() to /root/e and ensure that Content Only is enabled. 

This way, all three elements are extracted, including their content. You can optionally enable the Extract empty element as option to change the value extracted for the empty value. The Data Bank will now append the empty value to the writable data source:

ROW 1 = 5
ROW 2 =
ROW 3 = 6

Related Tutorials

The following tutorial lesson demonstrates how to use this tool: