Fixed help messages of the parent parser

chi_pet/chi_parse.py

@@ -15,8 +15,6 @@
 
 
 def parse_chi_options():
-    parser = argparse.ArgumentParser(prog='chi.py')
-
     parent_parser = argparse.ArgumentParser(add_help=False)
 
     parent_parser.add_argument('-a', '--args_file', type=Path,
@@ -26,6 +24,8 @@ def parse_chi_options():
     parent_parser.add_argument('-s', '--states', nargs='+', type=str,
                                help='Name of all the states the simulation will run eg. start, build, analyze, etc.')
 
+    parser = argparse.ArgumentParser(prog='chi.py', parents=[parent_parser])
+
     # TODO add prep functionality
     parser.add_argument('-P', '--prep', action='store_true',
                         help='Prepares simulationss to run with either states specified with -s or all argument states in --args_file.')

chi_pet/chi_run.py

@@ -5,7 +5,7 @@
 from .chi_lib import load_yaml_in_order, dump_yaml_in_order
 import argparse
 from pathlib import Path
-from .chi_parse import chi_parse
+from .chi_parse import parse_chi_options
 
 '''
 Name: ChiMain.py

tests/test_chi_parse.py

@@ -33,3 +33,7 @@ def test_chi_run_argument_parsing():
     sys.argv = ['chi', 'run', '-a',  'args.yaml']
     opts = parse_chi_options()
     assert opts.args_file == Path('args.yaml')
+
+    sys.argv = ['chi', 'run']
+    with pytest.raises(SystemExit):
+        opts = parse_chi_options()