You should definitely use SoapUI. Especially in a mixed environment. that is, in a mixed environment (java, delphi, WCF, etc.), SoapUI will become your usual tool that can confirm what works and what doesn't. You can also use it to configure mock services so you can test a service that is not yet built. those. from WSDL you can build something in minutes to register requests and give answers. It is very useful. In the future, you will be able to check what works and what does not use a regular tool, and not fight "works here in x technology, so this should be a problem in YOUR end".
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