Adds get_cadet_version()

This commit adds a get_cadet_version() function and calls it inside
run_simulation.

tests/create_LWE.py

@@ -1,5 +1,8 @@
 import numpy as np
 from typing import NoReturn
+import subprocess
+import re
+import warnings
 
 from CADETProcess.simulator import Cadet
 from CADETProcess import CADETProcessError
@@ -76,16 +79,43 @@ def create_lwe(unit_type: str, **kwargs) -> Process:
 
 
 def run_simulation(process: Process, cadet_install_path: str = None) -> NoReturn:
-    process_simulator = Cadet(
-        install_path=cadet_install_path)
+    process_simulator = Cadet(install_path=cadet_install_path)
     simulation_results = process_simulator.simulate(process)
 
+    cadet_version = get_cadet_version(process_simulator.cadet_path)
+
+    if cadet_version < '5.0.0':
+        warnings.warn(
+            f'You are using CADET version {cadet_version}, which might not support all unit operations.'
+            f'Please make sure to point to the correct CADET installation.',
+            UserWarning
+        )
+
     if simulation_results.exit_flag == 0:
         print(
             f'CADET-Process LWE test simulation for unit {process.flow_sheet.unit_names[1]} completed successfully')
     else:
         raise CADETProcessError(
-            f'CADET-Process LWE test simulation failed with {simulation_results.exit_message}')
+            f'CADET-Process LWE test simulation failed with {simulation_results.exit_message}'
+        )
+
+
+def get_cadet_version(cadet_install_path: str) -> str:
+    version_output = subprocess.run(
+        [cadet_install_path, '--version'],
+        check=True,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        text=True
+    ).stdout.strip()
+
+    version_match = re.search(r'cadet-cli version (\d+\.\d+\.\d+)', version_output)
+    if version_match:
+        cadet_version = version_match.group(1)
+    else:
+        raise ValueError("Unable to determine CADET version from the output")
+
+    return cadet_version
 
 
 def run_simulation_for_all_units(cadet_install_path: str = None) -> None:
@@ -300,4 +330,5 @@ def configure_flow_direction(unit_operation, **kwargs):
 if __name__ == "__main__":
     process = create_lwe('cstr')
     run_simulation(process)
-    run_simulation_for_all_units(cadet_install_path='C:/new_cadet_build/CADET/out/install/aRELEASE')
+    run_simulation_for_all_units(
+        cadet_install_path='C:/new_cadet_build/CADET/out/install/aRELEASE')