Tests updated. Attempt to fix remaining problems with forward keypress and numlock reporting.

tests/unit/test_pty_terminal_sequences.py

@@ -1,6 +1,7 @@
 import pytest
 from unittest.mock import Mock
 
+from fenrirscreenreader.core.eventData import FenrirEventType
 from fenrirscreenreader.screenDriver.ptyDriver import PTYConstants
 from fenrirscreenreader.screenDriver.ptyDriver import Terminal
 from fenrirscreenreader.screenDriver.ptyDriver import driver as PtyDriver
@@ -109,3 +110,37 @@ def test_pty_stdin_input_leaves_filtered_interrupts_to_key_events():
     pty_driver.interrupt_output_on_stdin_input(b"a")
 
     output_manager.interrupt_output.assert_not_called()
+
+
+@pytest.mark.unit
+def test_pty_backspace_with_fenrir_key_synthesizes_shortcut_events():
+    pty_driver = PtyDriver()
+    event_queue = Mock()
+    pty_driver.env = {
+        "input": {"curr_input": ["KEY_FENRIR"]},
+    }
+
+    handled = pty_driver.synthesize_backspace_shortcut(b"\x7f", event_queue)
+
+    assert handled is True
+    assert event_queue.put.call_count == 2
+    first_event = event_queue.put.call_args_list[0].args[0]
+    second_event = event_queue.put.call_args_list[1].args[0]
+    assert first_event["Type"] == FenrirEventType.keyboard_input
+    assert first_event["data"]["event_name"] == "KEY_BACKSPACE"
+    assert first_event["data"]["event_state"] == 1
+    assert second_event["data"]["event_state"] == 0
+
+
+@pytest.mark.unit
+def test_pty_plain_backspace_is_not_synthesized():
+    pty_driver = PtyDriver()
+    event_queue = Mock()
+    pty_driver.env = {
+        "input": {"curr_input": []},
+    }
+
+    handled = pty_driver.synthesize_backspace_shortcut(b"\x7f", event_queue)
+
+    assert handled is False
+    event_queue.put.assert_not_called()