JUnit
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You can change a test and re-run it without having to re-run the entire suite . To do so you have to enable the Keep JUnit running after a test run when
debugging checkbox on the Launch Configuration page and to run in Debug mode. Your VM has to support hot code replace for this feature.
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You can set the JUnit view as a fast view and have it show the results only where there are failures or errors. Select the Window > Preferences > Java >
JUnit > Show the JUnit results view only when an error or failure occurs checkbox.

Creating JUnit tests
Creating JUnit test suites
Running JUnit
Debugging a Test Failure

JUnit preference page