https://gist.github.com/binarytemple/a707114df7067c1c81ab ,

with help from

https://stackoverflow.com/a/49565707

The link to the old Sourceforge example guide is broken, an archived

version can be found here:

https://web.archive.org/web/20140509103954/https://sourceforge.net/apps/mediawiki/fortranxunit/index.php?title=FruitExample

Installation guide:

1. Untar the gz file

2. Put Ruby in your path.

3. Install rake gem
    gem install rake

4. Install fruit_processor gem
    cd fruit/fruit_processor_gem
    rake install

5. You may need to change your compiler from gfortran to other
   modify this line in rake_base.rb :
     $compiler = 'gfortran'
   $option = "-Wall -Wextra -pedantic -fbounds-check " +
             "-Wuninitialized -O -g -Wno-unused-parameter -cpp"

 By default, ifort is used if available.
 If ifort is abesnt, gfotran or FTN95 is used.

6. Build and run all the test
  cd fruit
  rake

(By default a sample sample_single_dir is omitted,
 because some old compilers does not accept *.f95 extension. Try
   rake sample_single_dir
 to run it.)

Samples:

in_3_minutes A sample of manually written driver. see https://web.archive.org/web/20140509103954/https://sourceforge.net/apps/mediawiki/fortranxunit/index.php?title=FruitExample * fruit.f90 must be copied to in_3_minutes beforehand.

sample Multi-directry test. Tester codes are in fruit-x.x.x/sample/test directry. Before running the test, tested code (fruit-x.x.x/sample/src/calculator.f90) and fruit code (fruit-x.x.x/src/fruit.f90) must be compiled into lib*.a archives. * libfruit.a needed. To prepare it, run "rake compile" in fruit-x.x.x directry for libfruit.a.

sample_single_dir Dependency between Fortran codes is estimated by "rake_estimate.rb" loaded from sample_single_dir/rakefile. see fruit-x.x.x/sample_single_dir/README. Tester code : sample_single_dir/mystack_test.f95 Tested code : sample_single_dir/mystack.f95, Z_constants.f95

sample_selective Testers to call is specifiled in a line in sample_selective/rakefile: fp.process_only = FileList["mydict_test.f90"] This sample also shows that test can be built even when main program (dummy_main.f90) exists. Dependency between Fortran codes is estimated by "rake_estimate.rb". Tester code: fruit-x.x.x/sample_selective/*_test.f90 Tested code: fruit-x.x.x/sample_selective/constant.f90, mydict.f90

sample_build_dir This sample shows build directry may differ from source directry. It also shows that test can be built even when main program (main.f90) exists. Tester code : fruit-x.x.x/sample_build_dir/atoz_test.f90 Tested code : fruit-x.x.x/sample_build_dir/atoz.f90 Build test in fruit-x.x.x/sample_build_dir/build_unittest

sample_multi_dir Tester codes and tested codes are in different directries. Sample of building only selected testers are build in "build_selective" directry and that of all testers are built in "build" directry. Tester codes: fruit-x.x.x/sample_multi_dir/test/.f90 Tested codes: fruit-x.x.x/sample_multi_dir/src/.f90 Build is done in fruit-x.x.x/sample_multi_dir/build/ Selective build: fruit-x.x.x/sample_multi_dir/build_selective/

sample_openmp Tester code uses multiple threads using OpenMP.

self_test Test of fruit.f90 itself.

self_test_openmp Test of fruit.f90 itself. Tester code uses multiple threads using OpenMP.