Update test scripts to be posix compliant

[ColemanTom]

I've made some changes to the test scripts to make them shell compliant (or more modern shell). I am making this as it was found building this on OSX led to failures for run_ipolates_tests.sh.

The majority are simple things like

• Change ` ... ` to $(....)
• Change [[ ... to [ ...

The bigger changes are to run_gmerge_tests.sh and run_ipolates_tests.sh

run_gmerge_tests.sh

If running as zsh, there is a risk that word splitting won't work properly, so I've redefined args to be using the positional array @, and use that everywhere. It's the only way I know of which suppoprts all shells.

run_ipolates_tests.sh

The named output pipe is BASH specific. I've chanegd to a series of three numbered redirects which gives the same result in this case.

Testing

Before this change, if I change bash to zsh in the ctest setup, run_ipolates_tests.sh fails due to the named pipe. Its not posix compliant, but if running as zsh, it fails too as its not a zsh thing. The [[ didn't cause issues as they are in most shells anyway.

Test project /home/tcoleman/code/wgrib2-feedstock/wgrib2-3.8.0/bld
      Start  1: run_wgrib2_tests.sh
 1/15 Test  #1: run_wgrib2_tests.sh ................   Passed    2.33 sec
      Start  2: run_wgrib2_rpn_tests.sh
 2/15 Test  #2: run_wgrib2_rpn_tests.sh ............   Passed    0.82 sec
      Start  3: run_wgrib2_update_table_tests.sh
 3/15 Test  #3: run_wgrib2_update_table_tests.sh ...   Passed    0.05 sec
      Start  4: run_wgrib2_png_tests.sh
 4/15 Test  #4: run_wgrib2_png_tests.sh ............   Passed    0.74 sec
      Start  5: run_gmerge_tests.sh
 5/15 Test  #5: run_gmerge_tests.sh ................***Failed    0.30 sec
      Start  6: run_wgrib2_netcdf4_tests.sh
 6/15 Test  #6: run_wgrib2_netcdf4_tests.sh ........   Passed    1.25 sec
      Start  7: run_wgrib2_netcdf3_tests.sh
 7/15 Test  #7: run_wgrib2_netcdf3_tests.sh ........   Passed    0.28 sec
      Start  8: run_wgrib_tests.sh
 8/15 Test  #8: run_wgrib_tests.sh .................   Passed    0.02 sec
      Start  9: run_ipolates_tests.sh
 9/15 Test  #9: run_ipolates_tests.sh ..............***Failed    2.71 sec
      Start 10: run_wgrib2_aec_tests.sh
10/15 Test #10: run_wgrib2_aec_tests.sh ............   Passed    0.94 sec
      Start 11: run_jpeg_tests.sh
11/15 Test #11: run_jpeg_tests.sh ..................   Passed   12.13 sec
      Start 12: test_fortran_api
12/15 Test #12: test_fortran_api ...................   Passed    0.13 sec
      Start 13: test_lib.sh
13/15 Test #13: test_lib.sh ........................   Passed    0.00 sec
      Start 14: test_c_api
14/15 Test #14: test_c_api .........................   Passed    0.13 sec
      Start 15: test_shared_lib.sh
15/15 Test #15: test_shared_lib.sh .................   Passed    0.00 sec

87% tests passed, 2 tests failed out of 15

Total Test time (real) =  21.87 sec

The following tests FAILED:
	  5 - run_gmerge_tests.sh (Failed)
	  9 - run_ipolates_tests.sh (Failed)
Errors while running CTest

Apparently forcing to zsh can also lead to failures in the gmerge tests which I had not seen before.

After I make this change, whilst forcing to run as zsh, all tests pass

Test project /home/tcoleman/code/wgrib2/bld
      Start  1: run_wgrib2_tests.sh
 1/26 Test  #1: run_wgrib2_tests.sh ................   Passed    4.30 sec
      Start  2: run_wgrib2_rpn_tests.sh
 2/26 Test  #2: run_wgrib2_rpn_tests.sh ............   Passed    0.98 sec
      Start  3: run_wgrib2_update_table_tests.sh
 3/26 Test  #3: run_wgrib2_update_table_tests.sh ...   Passed    0.05 sec
      Start  4: run_wgrib2_png_tests.sh
 4/26 Test  #4: run_wgrib2_png_tests.sh ............   Passed    0.71 sec
      Start  5: run_gmerge_tests.sh
 5/26 Test  #5: run_gmerge_tests.sh ................   Passed   95.43 sec
      Start  6: run_wgrib2_netcdf4_tests.sh
 6/26 Test  #6: run_wgrib2_netcdf4_tests.sh ........   Passed    1.57 sec
      Start  7: run_wgrib2_netcdf3_tests.sh
 7/26 Test  #7: run_wgrib2_netcdf3_tests.sh ........   Passed    0.40 sec
      Start  8: run_wgrib_tests.sh
 8/26 Test  #8: run_wgrib_tests.sh .................   Passed    0.03 sec
      Start  9: run_ipolates_tests.sh
 9/26 Test  #9: run_ipolates_tests.sh ..............   Passed   23.83 sec
      Start 10: run_wgrib2_aec_tests.sh
10/26 Test #10: run_wgrib2_aec_tests.sh ............   Passed    1.59 sec
      Start 11: run_jpeg_tests.sh
11/26 Test #11: run_jpeg_tests.sh ..................   Passed   12.67 sec
      Start 12: test_uint8_64bit
12/26 Test #12: test_uint8_64bit ...................   Passed    0.01 sec
      Start 13: test_uint8_32bit
13/26 Test #13: test_uint8_32bit ...................   Passed    0.01 sec
      Start 14: test_rd_msg
14/26 Test #14: test_rd_msg ........................   Passed    0.03 sec
      Start 15: test_fortran_api
15/26 Test #15: test_fortran_api ...................   Passed    0.13 sec
      Start 16: test_lib.sh
16/26 Test #16: test_lib.sh ........................   Passed    0.00 sec
      Start 17: test_c_api
17/26 Test #17: test_c_api .........................   Passed    0.13 sec
      Start 18: test_string2time_unit
18/26 Test #18: test_string2time_unit ..............   Passed    0.01 sec
      Start 19: test_read_latlon
19/26 Test #19: test_read_latlon ...................   Passed    0.02 sec
      Start 20: test_pdt_len
20/26 Test #20: test_pdt_len .......................   Passed    0.02 sec
      Start 21: test_addtime
21/26 Test #21: test_addtime .......................   Passed    0.02 sec
      Start 22: test_flt2ieee
22/26 Test #22: test_flt2ieee ......................   Passed    0.03 sec
      Start 23: test_units
23/26 Test #23: test_units .........................   Passed    0.02 sec
      Start 24: test_update_sec
24/26 Test #24: test_update_sec ....................   Passed    0.02 sec
      Start 25: test_subtime
25/26 Test #25: test_subtime .......................   Passed    0.03 sec
      Start 26: test_shared_lib.sh
26/26 Test #26: test_shared_lib.sh .................   Passed    0.01 sec

100% tests passed, 0 tests failed out of 26

Total Test time (real) = 142.06 sec