ITK/Release 4/Modularization/ Add tests

Regression tests(need test driver):

• Approach a: stand-alone regression test

• Approach b: using the test driver macro

The CMake macro "CreateTestDriver" defined in "Module/Core/TestKernal/CreateTestDriver.cmake" is designed to make it easy to do regression tests in ITK.

e.g. set(ITK-FooFilterTests
        itkFooFilterTest1.cxx
        itkFooFilterTest2.cxx)
      

Non-regression tests

The same way it used to be, except the "add_test" command:

• add_executable( [executable name] [source file or files])

• target_link_libraries([executable name] <name of libraries])

• adopt the modern CMake syntax :[NAME, COMMAND]: add_test(NAME [test name] COMMAND [executable name] [arguments])

 e.g. add_executable(itkBinaryThresholdFilterTest itkBinaryThresholdFilterTest.cxx)
      target_link_libraries(itkBindaryThresholdFilterTest ${ITK-BinaryThreshold_LIBRARIES})
      add_test(NAME itkBinaryThresholdFilterTest  
            COMMAND itkBinaryThresholdFilterTest input.png output.png)