systemtests: add per-test max_time override for precice-config

changelog-entries/402.md

@@ -0,0 +1 @@
+- Add per-test `max_time` override in `tests.yaml` to cap preCICE simulation time without editing `precice-config.xml` manually. Applies consistently to both test runs and reference result generation. Handles multiple `<max-time>` tags with a warning.

tools/tests/README.md

@@ -118,6 +118,8 @@ In order for the systemtests to pick up the tutorial we need to define a `metada
 To add a testsuite just open the `tests.yaml` file and use the output of `python print_case_combinations.py` to add the right case combinations you want to test. Note that you can specify a `reference_result` which is not yet present. The `generate_reference_data.py` will pick that up and create it for you.
 Note that its important to carefully check the paths of the `reference_result` in order to not have typos in there. Also note that same cases in different testsuites should use the same `reference_result`.
 
+To cap the simulation time without editing `precice-config.xml` manually, add an optional `max_time` field (positive number, in seconds) to any tutorial entry. This overrides the `<max-time>` tag in `precice-config.xml` at run time, and applies consistently to both test runs and reference result generation.
+
 ### Generate reference results
 
 Since we need data to compare against, you need to run `python generate_reference_data.py`. This process might take a while.
@@ -319,6 +321,7 @@ test_suites:
           - fluid-openfoam
           - solid-openfoam
         reference_result: ./flow-over-heated-plate/reference-results/fluid-openfoam_solid-openfoam.tar.gz
+        max_time: 10.0  # optional: overrides <max-time> in precice-config.xml (seconds)
   openfoam_adapter_release:
     tutorials:
       - path: flow-over-heated-plate

tools/tests/generate_reference_results.py

@@ -108,10 +108,11 @@ def main():
     for test_suite in test_suites:
         tutorials = test_suite.cases_of_tutorial.keys()
         for tutorial in tutorials:
-            for case, reference_result in zip(
-                    test_suite.cases_of_tutorial[tutorial], test_suite.reference_results[tutorial]):
+            max_times = test_suite.max_times.get(tutorial, [None] * len(test_suite.cases_of_tutorial[tutorial]))
+            for case, reference_result, max_time in zip(
+                    test_suite.cases_of_tutorial[tutorial], test_suite.reference_results[tutorial], max_times):
                 systemtests_to_run.add(
-                    Systemtest(tutorial, build_args, case, reference_result))
+                    Systemtest(tutorial, build_args, case, reference_result, max_time=max_time))
 
     reference_result_per_tutorial = {}
     current_time_string = datetime.now().strftime('%Y-%m-%d %H:%M:%S')

tools/tests/systemtests.py

@@ -58,10 +58,11 @@ def main():
         for test_suite in test_suites_to_execute:
             tutorials = test_suite.cases_of_tutorial.keys()
             for tutorial in tutorials:
-                for case, reference_result in zip(
-                        test_suite.cases_of_tutorial[tutorial], test_suite.reference_results[tutorial]):
+                max_times = test_suite.max_times.get(tutorial, [None] * len(test_suite.cases_of_tutorial[tutorial]))
+                for case, reference_result, max_time in zip(
+                        test_suite.cases_of_tutorial[tutorial], test_suite.reference_results[tutorial], max_times):
                     systemtests_to_run.append(
-                        Systemtest(tutorial, build_args, case, reference_result))
+                        Systemtest(tutorial, build_args, case, reference_result, max_time=max_time))
 
     if not systemtests_to_run:
         raise RuntimeError("Did not find any Systemtests to execute.")

tools/tests/systemtests/Systemtest.py

@@ -134,6 +134,7 @@ class Systemtest:
     arguments: SystemtestArguments
     case_combination: CaseCombination
     reference_result: ReferenceResult
+    max_time: Optional[float] = None
     params_to_use: Dict[str, str] = field(init=False)
     env: Dict[str, str] = field(init=False)
 
@@ -513,11 +514,52 @@ def __write_logs(self, stdout_data: List[str], stderr_data: List[str]):
         with open(self.system_test_dir / "stderr.log", 'w') as stderr_file:
             stderr_file.write("\n".join(stderr_data))
 
+    def __apply_precice_max_time_override(self):
+        """
+        If max_time is set, override the <max-time value="..."/> in precice-config.xml
+        of the copied tutorial directory. Applies to both test runs and reference generation.
+        Targets only <max-time> tags to avoid modifying time-window-size or other attributes.
+        """
+        if self.max_time is None:
+            return
+        if not (isinstance(self.max_time, (int, float)) and self.max_time > 0):
+            logging.warning(
+                f"Invalid max_time {self.max_time!r} for {self}; must be a positive number. Skipping override.")
+            return
+        config_path = self.system_test_dir / "precice-config.xml"
+        if not config_path.exists():
+            logging.warning(
+                f"Requested max_time override for {self}, but no precice-config.xml "
+                f"found in {self.system_test_dir}")
+            return
+        try:
+            text = config_path.read_text()
+        except Exception as e:
+            logging.warning(f"Could not read {config_path} to apply max_time override: {e}")
+            return
+        pattern = r'(<max-time\s+value=")([^"]*)(")'
+        matches = re.findall(pattern, text)
+        if not matches:
+            logging.warning(
+                f"Requested max_time override for {self}, but no <max-time .../> tag "
+                f"found in {config_path}")
+            return
+        if len(matches) > 1:
+            logging.warning(
+                f"Multiple <max-time> tags found in {config_path}; overriding all to {self.max_time}")
+        new_text = re.sub(pattern, rf"\g<1>{self.max_time}\g<3>", text)
+        try:
+            config_path.write_text(new_text)
+            logging.info(f"Overwrote max-time in {config_path} to {self.max_time} for {self}")
+        except Exception as e:
+            logging.warning(f"Failed to write updated {config_path}: {e}")
+
     def __prepare_for_run(self, run_directory: Path):
         """
         Prepares the run_directory with folders and datastructures needed for every systemtest execution
         """
         self.__copy_tutorial_into_directory(run_directory)
+        self.__apply_precice_max_time_override()
         self.__copy_tools(run_directory)
         self.__put_gitignore(run_directory)
         host_uid, host_gid = self.__get_uid_gid()

tools/tests/systemtests/TestSuite.py

@@ -10,6 +10,7 @@ class TestSuite:
     name: str
     cases_of_tutorial: Dict[Tutorial, List[CaseCombination]]
     reference_results: Dict[Tutorial, List[ReferenceResult]]
+    max_times: Dict[Tutorial, List[Optional[float]]] = field(default_factory=dict)
 
     def __repr__(self) -> str:
         return_string = f"Test suite: {self.name} contains:"
@@ -48,6 +49,7 @@ def from_yaml(cls, path, parsed_tutorials: Tutorials):
             for test_suite_name in test_suites_raw:
                 case_combinations_of_tutorial = {}
                 reference_results_of_tutorial = {}
+                max_times_of_tutorial = {}
                 # iterate over tutorials:
                 for tutorial_case in test_suites_raw[test_suite_name]['tutorials']:
                     tutorial = parsed_tutorials.get_by_path(tutorial_case['path'])
@@ -57,6 +59,7 @@ def from_yaml(cls, path, parsed_tutorials: Tutorials):
                     if tutorial not in case_combinations_of_tutorial:
                         case_combinations_of_tutorial[tutorial] = []
                         reference_results_of_tutorial[tutorial] = []
+                        max_times_of_tutorial[tutorial] = []
 
                     all_case_combinations = tutorial.case_combinations
                     case_combination_requested = CaseCombination.from_string_list(
@@ -65,12 +68,19 @@ def from_yaml(cls, path, parsed_tutorials: Tutorials):
                         case_combinations_of_tutorial[tutorial].append(case_combination_requested)
                         reference_results_of_tutorial[tutorial].append(ReferenceResult(
                             tutorial_case['reference_result'], case_combination_requested))
+                        raw_max_time = tutorial_case.get('max_time')
+                        if raw_max_time is not None:
+                            if not (isinstance(raw_max_time, (int, float)) and raw_max_time > 0):
+                                raise ValueError(
+                                    f"Invalid max_time {raw_max_time!r} for tutorial "
+                                    f"'{tutorial_case['path']}'; must be a positive number.")
+                        max_times_of_tutorial[tutorial].append(raw_max_time)
                     else:
                         raise Exception(
                             f"Could not find the following cases {tutorial_case['case-combination']} in the current metadata of tutorial {tutorial.name}")
 
                 testsuites.append(TestSuite(test_suite_name, case_combinations_of_tutorial,
-                                            reference_results_of_tutorial))
+                                            reference_results_of_tutorial, max_times_of_tutorial))
 
         return cls(testsuites)