switch from env. variable to --test argument

Author: sergey-yaroslavtsev

src/PyMca5/PyMcaGui/pymca/PyMcaMain.py

@@ -49,7 +49,8 @@
                    'nativefiledialogs=',
                    'PySide=',
                    'binding=',
-                   'logging=']
+                   'logging=',
+                   'test']
     try:
         opts, args = getopt.getopt(
                      sys.argv[1:],
@@ -99,6 +100,19 @@
                 import PyQt6.QtCore
             else:
                 raise ValueError("Unknown Qt binding <%s>" % binding)
+        elif opt in ('--test'):
+            try:
+                from PyMca5.tests import TestAll
+                print("Running PyMca Unit Tests...")
+                result = TestAll.main()
+                exit_code = 0 if result.wasSuccessful() else 1
+                print('exit code: ', exit_code)
+                sys.exit(exit_code)
+            except Exception as e:
+                import traceback
+                print("Failed to run tests:", e)
+                traceback.print_exc()
+                sys.exit(1)
 
     from PyMca5.PyMcaCore.LoggingLevel import getLoggingLevel
     logging.basicConfig(level=getLoggingLevel(opts))