Extra Input selection tests

Author: darrenburns

CHANGELOG.md

@@ -16,6 +16,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Added new keybinds (hold shift) for text selection in `Input` https://github.com/Textualize/textual/pull/5340
 - Added `Input.selection` reactive attribute for reading and updating the current selection https://github.com/Textualize/textual/pull/5340
 - Added `Input.select_on_focus` (default `True`) to enable/disable selecting all text in an `Input` on focus https://github.com/Textualize/textual/pull/5340
+- Added methods `Input.replace`, `Input.insert`, `Input.delete`, `Input.delete_selection` for editing text https://github.com/Textualize/textual/pull/5340
+- Added `Input.selected_text` property for getting the currently selected text https://github.com/Textualize/textual/pull/5340
 - `Input` can now be scrolled independently of cursor position (hold shift and scroll with the mouse wheel in supported environments) https://github.com/Textualize/textual/pull/5340
 
 ## Changed

src/textual/widgets/_input.py

@@ -743,6 +743,12 @@ def clear(self) -> None:
         """Clear the input."""
         self.value = ""
 
+    @property
+    def selected_text(self) -> str:
+        """The text between the start and end points of the current selection."""
+        start, end = sorted(self.selection)
+        return self.value[start:end]
+
     def action_cursor_left(self, select: bool = False) -> None:
         """Move the cursor one position to the left.
 

tests/input/test_input.py

@@ -6,6 +6,7 @@
 from textual.app import App, ComposeResult
 from textual.containers import Container
 from textual.widgets import Input
+from textual.widgets.input import Selection
 
 
 class InputApp(App[None]):
@@ -61,3 +62,34 @@ async def test_input_height():
             input_widget.styles.height.value == input_widget.parent.styles.height.value
         )
         assert input_widget.parent.styles.height.value == 1
+
+
+async def test_input_selected_text():
+    async with InputApp().run_test() as pilot:
+        input_widget = pilot.app.query_one(Input)
+        input_widget.value = "Hello, world!"
+        input_widget.selection = Selection(0, 4)
+        assert input_widget.selected_text == "Hell"
+
+        # Reverse selection
+        input_widget.selection = Selection(4, 0)
+        assert input_widget.selected_text == "Hell"
+
+        # Empty selection
+        input_widget.selection = Selection(4, 4)
+        assert input_widget.selected_text == ""
+
+
+async def test_input_selection_deleted_programmatically():
+    async with InputApp().run_test() as pilot:
+        input_widget = pilot.app.query_one(Input)
+        input_widget.value = "Hello, world!"
+        input_widget.selection = Selection(0, 4)
+        input_widget.delete_selection()
+        assert input_widget.value == "o, world!"
+
+        # Reverse selection
+        input_widget.value = "Hello, world!"
+        input_widget.selection = Selection(4, 0)
+        input_widget.delete_selection()
+        assert input_widget.value == "o, world!"