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What are the best ways to test and debug ESBs that use SOAP-based web services?

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If you work with enterprise software, you probably know how important it is to test and debug your ESBs (Enterprise Service Buses) that use SOAP (Simple Object Access Protocol) based web services. ESBs are middleware tools that integrate different applications and services using a common communication model. SOAP is a protocol that defines how messages are formatted and transmitted over networks, using XML (Extensible Markup Language) and HTTP (Hypertext Transfer Protocol). In this article, you will learn some of the best ways to test and debug ESBs that use SOAP-based web services, and how to avoid some common pitfalls.

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Morten Wittrock

SAP integration veteran | Member of the SAP Mentors program | SAP PRESS author | SAP community enthusiast

1 Use SOAP testing tools

One of the easiest ways to test and debug ESBs that use SOAP-based web services is to use SOAP testing tools. These are software applications that allow you to create, send, receive, and analyze SOAP messages, without writing any code. You can use these tools to simulate different scenarios, check the functionality and performance of your ESBs, and identify any errors or issues. Some of the most popular SOAP testing tools are SoapUI, Postman, and REST Assured.

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2 Validate your SOAP messages

Another way to test and debug ESBs that use SOAP-based web services is to validate your SOAP messages. This means checking that your messages follow the rules and standards of the SOAP protocol, and that they contain the correct data and structure. You can use XML validators, such as XMLSpy, to validate your SOAP messages against the XML schema and the WSDL (Web Services Description Language) file. WSDL is a document that describes the specifications and capabilities of a web service, such as the operations, parameters, and formats. Validating your SOAP messages can help you avoid syntax errors, data inconsistencies, and compatibility issues.

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3 Monitor your ESB logs

A third way to test and debug ESBs that use SOAP-based web services is to monitor your ESB logs. These are files that record the events and activities that occur in your ESB, such as the incoming and outgoing SOAP messages, the transformations, the routing, and the exceptions. You can use log monitoring tools, such as Splunk, Logstash, or ELK Stack, to collect, analyze, and visualize your ESB logs. You can use these tools to track the performance and behavior of your ESBs, detect any anomalies or failures, and troubleshoot any problems.

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4 Use breakpoints and debuggers

A fourth way to test and debug ESBs that use SOAP-based web services is to use breakpoints and debuggers. These are features that allow you to pause the execution of your ESBs at specific points, and inspect the values and states of the variables, objects, and expressions. You can use breakpoints and debuggers to step through your ESB code, line by line, and verify the logic and flow of your ESBs. You can use IDEs (Integrated Development Environments), such as Eclipse, IntelliJ IDEA, or Visual Studio Code, to set breakpoints and debuggers in your ESB code.

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5 Use unit testing and integration testing

A fifth way to test and debug ESBs that use SOAP-based web services is to use unit testing and integration testing. These are types of testing that allow you to verify the quality and functionality of your ESBs at different levels. Unit testing is testing that focuses on the individual components or modules of your ESBs, such as the message processors, the mediators, or the connectors. Integration testing is testing that focuses on the interactions and integrations between your ESBs and the other applications and services that they connect to. You can use testing frameworks, such as JUnit, TestNG, or Mockito, to create and run unit tests and integration tests for your ESBs.

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6 Use mock services and stubs

A sixth way to test and debug ESBs that use SOAP-based web services is to use mock services and stubs. These are fake or simulated versions of the real web services that your ESBs interact with. You can use mock services and stubs to isolate your ESBs from the dependencies and uncertainties of the external web services, such as the availability, the latency, or the response. You can use mock services and stubs to test and debug your ESBs in a controlled and predictable environment, without affecting the production systems. You can use tools, such as WireMock, MockServer, or SoapUI, to create and use mock services and stubs for your ESBs.

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Morten Wittrock

SAP integration veteran | Member of the SAP Mentors program | SAP PRESS author | SAP community enthusiast
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The latency point is important. A mocked service - ideally running close to the integration platform - reduces latency and this translates directly to your test cases executing faster. This shortens the testing feedback cycle and this really helps developers integrate testing into their day-to-day.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Morten Wittrock

SAP integration veteran | Member of the SAP Mentors program | SAP PRESS author | SAP community enthusiast
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Regardless of how you implement your testing, strive to automate as much of it as possible. This carries multiple benefits: - Unlike manual testing performed by humans, automated testing is not error-prone at scale. - You can be testing continuously with close to zero added effort and more testing equals higher quality. - Testing continuously lets you catch errors early. - Automated testing lets you realize the full benefit of CI/CD pipelines and devops in general. Many SOAP tools offer automation out of the box, so implementing this advice can very likely be done without introducing new products into your landscape. With test automation in place, you can consider, for instance, Test Driven Development as the next step.

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What are the best ways to test and debug ESBs that use SOAP-based web services?

1

2

3

4

5

6

7

1 Use SOAP testing tools

2 Validate your SOAP messages

3 Monitor your ESB logs

4 Use breakpoints and debuggers

5 Use unit testing and integration testing

6 Use mock services and stubs

7 Here’s what else to consider

Enterprise Software

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What are the best ways to test and debug ESBs that use SOAP-based web services?

1

2

3

4

5

6

7

1 Use SOAP testing tools

2 Validate your SOAP messages

3 Monitor your ESB logs

4 Use breakpoints and debuggers

5 Use unit testing and integration testing

6 Use mock services and stubs

7 Here’s what else to consider

Enterprise Software

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