Geb vs unobtainium
When comparing Geb vs unobtainium, the Slant community recommends Geb for most people. In the question“What are the best test automation tools for web apps?” Geb is ranked 15th while unobtainium is ranked 21st. The most important reason people chose Geb is:
It's very easy to integrate Geb with any build system.
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Pros
Pro Easy integration with build systems
It's very easy to integrate Geb with any build system.
Pro Asynchronous requests testing is a easier
Asynchronous web pages can easily be tested with Geb as it has built in, easy to use support for testing such operations.
Pro Extensible
Custom drivers for e.g. API testing or static HTML testing exist and are easily built. Driver modules allow you to extend the main driver (e.g. Selenium or Appium) with ease.
Pro Platform agnostic because it is configuration driven
For test suites crossing multiple platforms, selecting the test target platform can be driven entirely by configuration.
Pro Seamlessly automate mobile and desktop browsers
Based on either Appium or Selenium, the API remains largely the same when switching between different platforms.
Cons
Con Low IDE support
There are not many IDEs that support Geb.