Allow fom units to be expanded by regex group

lib/ramble/ramble/application.py

@@ -1705,9 +1705,12 @@ def format_context(context_match, context_format):
                                     if context not in fom_values:
                                         fom_values[context] = {}
                                     fom_val = fom_match.group(fom_conf["group"])
+                                    fom_unit = self.expander.expand_var(
+                                        fom_conf["units"], extra_vars=fom_vars
+                                    )
                                     fom_values[context][fom_name] = {
                                         "value": fom_val,
-                                        "units": fom_conf["units"],
+                                        "units": fom_unit,
                                         "origin": fom_conf["origin"],
                                         "origin_type": fom_conf["origin_type"],
                                         "fom_type": fom_conf["fom_type"],

lib/ramble/ramble/test/end_to_end/expanded_fom_dry_run.py

@@ -67,9 +67,11 @@ def test_expanded_foms_dry_run(mutable_config, mutable_mock_workspace_path, mock
 
         exp_dir = os.path.join(ws1.root, "experiments", "expanded_foms", "test_wl", "single_exp")
         fom_out_file = os.path.join(exp_dir, "single_exp.out")
+
+        unit = "seconds"
         with open(fom_out_file, "w+") as f:
             for expected in expected_expansions:
-                f.write(f"Collect FOM {expected} = 567.8 seconds\n")
+                f.write(f"Collect FOM {expected} = 567.8 {unit}\n")
 
         ws1._re_read()
         output = workspace("analyze", global_args=["-w", workspace_name])
@@ -79,4 +81,4 @@ def test_expanded_foms_dry_run(mutable_config, mutable_mock_workspace_path, mock
         with open(text_results_files[0]) as f:
             data = f.read()
             for expected in expected_expansions:
-                assert f"test_fom {expected} = 567.8" in data
+                assert f"test_fom {expected} = 567.8 {unit}" in data

var/ramble/repos/builtin.mock/applications/expanded_foms/application.py

@@ -31,10 +31,10 @@ class ExpandedFoms(ExecutableApplication):
 
     figure_of_merit(
         "test_fom {var}",
-        fom_regex=r"Collect FOM (?P<var>\w+)\s=\s(?P<test>[0-9]+\.[0-9]+) seconds",
+        fom_regex=r"Collect FOM (?P<var>\w+)\s=\s(?P<test>[0-9]+\.[0-9]+) (?P<unit>\w+)",
         log_file="{log_file}",
         group_name="test",
-        units="s",
+        units="{unit}",
     )
 
     success_criteria("Run", mode="string", match=r"Collect", file="{log_file}")