Reload test without restarting testium (closes #18)

Replace os.execv restart in actionRefresh with file_manager.reload(),
leveraging the subprocess architecture so py_func modules are freshly
imported on each reload. Add a modal progress dialog with step labels
during loading. Fix checkbox reappearing on breakpoint with
show_checkboxes OFF.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/testium/main_win/test_file_manager.py

@@ -3,7 +3,8 @@ import sys
 import traceback
 from queue import Empty
 
-from PySide6.QtWidgets import QApplication, QFileDialog
+from PySide6.QtCore import Qt
+from PySide6.QtWidgets import QApplication, QFileDialog, QProgressDialog
 
 from interpreter.process import TestProcess
 from interpreter.utils.test_ctrl import TestSetController
@@ -44,9 +45,25 @@ class TestFileManager:
         self.load(file_name)
         w.reconnect_signals()
 
+    def _make_progress(self, w):
+        progress = QProgressDialog("Starting test process…", None, 0, 0, w)
+        progress.setWindowTitle("Loading")
+        progress.setWindowFlags(Qt.Dialog | Qt.CustomizeWindowHint | Qt.WindowTitleHint)
+        progress.setWindowModality(Qt.WindowModal)
+        progress.setMinimumDuration(0)
+        progress.setMinimumWidth(320)
+        progress._force_close = False
+        progress.closeEvent = lambda e: e.accept() if progress._force_close else e.ignore()
+        return progress
+
+    def _close_progress(self, progress):
+        progress._force_close = True
+        progress.close()
+
     def load(self, file_name: str) -> bool:
         """Load a test file. Returns True on success, False otherwise."""
         w = self._win
+        progress = None
         try:
             if not file_name:
                 raise ETUMFileError("No file to load")
@@ -59,6 +76,10 @@ class TestFileManager:
             if not os.path.isfile(file_name):
                 raise ETUMFileError("Could not find %s file" % file_name)
 
+            progress = self._make_progress(w)
+            progress.show()
+            QApplication.processEvents()
+
             w.testFile = None
             w.ts_controller = TestSetController()
             w.test_service = TestControllerService(w.ts_controller)
@@ -71,12 +92,14 @@ class TestFileManager:
                 self._defaults_for_process(),
             )
             w.test_proc.start()
+            progress.setLabelText("Loading test file…")
             while w.test_proc.is_alive():
                 try:
-                    if w.test_service.loaded(timeout=1.0):
+                    if w.test_service.loaded(timeout=0.05):
                         break
                 except Empty:
                     w.test_service.clear()
+                QApplication.processEvents()
 
             if not w.test_proc.is_alive():
                 del w.test_proc
@@ -89,9 +112,14 @@ class TestFileManager:
                     "Test could not be loaded (test process crashed for any reason)"
                 )
 
+            progress.setLabelText("Building test tree…")
+            QApplication.processEvents()
             test_data = w.test_service.tree()
             w.treeTests.clear()
+            QApplication.processEvents()
             w.treeTests.loadTestRecursively(w.treeTests.invisibleRootItem(), test_data)
+            self._close_progress(progress)
+            progress = None
             w.treeTests.setFoldDefault()
             w.treeTests.updateTreeSkipState(w.test_service)
 
@@ -109,6 +137,8 @@ class TestFileManager:
             w.show_checkboxes()
             return True
         except:
+            if progress is not None:
+                self._close_progress(progress)
             w.statusBar().showMessage("No test file could be loaded", 10000)
             w.treeTests.clear()
             print(traceback.format_exc())

src/testium/main_win/testium_win.py

@@ -8,7 +8,6 @@ from multiprocessing import Queue
 from queue import Empty
 from threading import Thread
 import shutil
-import ast
 
 # Qt
 from PySide6 import QtGui, QtWidgets
@@ -471,21 +470,8 @@ class MainWindow(QMainWindow, Ui_MainWindow):
 
     @Slot()
     def on_actionRefresh_test_triggered(self):
-        self.on_exiting()
+        if self.testFile:
-        args = []
+            self.file_manager.reload(self.testFile)
-        if not hasattr(sys, "frozen"):
-            args += [sys.executable]
-        args += [sys.argv[0]]
-        if len(self.defines) > 0:
-            for k, v in self.defines.items():
-                try:
-                    val = ast.literal_eval(v)
-                except:
-                    val = v
-                args += ["-d", f"{k}={val}"]
-        if (self.testFile is not None) and (isinstance(self.testFile, str)):
-            args += [self.testFile]
-        os.execv(sys.executable, args)
 
     @Slot()
     def on_actionSave_report_triggered(self):