Add tests for selection persisting

- Remove unneeded override of qt home method

qutebrowser/misc/miscwidgets.py

@@ -105,13 +105,6 @@ class CommandLineEdit(QLineEdit):
         self._validator.prompt = text
         self._promptlen = len(text)
 
-    def home(self, mark):
-        """Override home so it works properly with our cursor restriction."""
-        oldpos = self.cursorPosition()
-        self.setCursorPosition(self._promptlen)
-        if mark:
-            self.setSelection(self._promptlen, oldpos - self._promptlen)
-
 
 class _CommandValidator(QValidator):
 

tests/unit/misc/test_miscwidgets.py

@@ -59,8 +59,8 @@ class TestCommandLineEdit:
         assert cmd_edit.text() == ':hello'
         assert cmd_edit.cursorPosition() == len(':hello')
 
-        cmd_edit.home(mark=True)
-        assert cmd_edit.cursorPosition() == len(':hello')
+        cmd_edit.home(True)
+        assert cmd_edit.cursorPosition() == len(':')
         qtbot.keyClick(cmd_edit, Qt.Key_Delete)
         assert cmd_edit.text() == ':'
         qtbot.keyClick(cmd_edit, Qt.Key_Backspace)
@@ -74,6 +74,25 @@ class TestCommandLineEdit:
         qtbot.keyClicks(cmd_edit, '$hello')
         assert cmd_edit.text() == ''
 
+    def test_selection_home(self, qtbot, cmd_edit):
+        """Test selection persisting when pressing home."""
+        qtbot.keyClicks(cmd_edit, ':hello')
+        assert cmd_edit.text() == ':hello'
+        assert cmd_edit.cursorPosition() == len(':hello')
+        cmd_edit.home(True)
+        assert cmd_edit.cursorPosition() == len(':')
+        assert cmd_edit.selectionStart() == len(':')
+
+    def test_selection_backspace(self, qtbot, cmd_edit):
+        """Test selection persisting when backspacing to the first char."""
+        qtbot.keyClicks(cmd_edit, ':hello')
+        assert cmd_edit.text() == ':hello'
+        assert cmd_edit.cursorPosition() == len(':hello')
+        for _ in range(len(':hello')):
+            qtbot.keyClick(cmd_edit, Qt.Key_Left, modifier=Qt.ShiftModifier)
+        assert cmd_edit.cursorPosition() == len(':')
+        assert cmd_edit.selectionStart() == len(':')
+
 
 class WrappedWidget(QWidget):