# -*- coding: utf-8 -*-
#
# Copyright © Spyder Project Contributors
# Licensed under the terms of the MIT License
#

"""
Tests for codeeditor.py.
"""

try:
    from unittest.mock import Mock
except ImportError:
    from mock import Mock  # Python 2

# Third party imports
import pytest
from qtpy.QtGui import QTextCursor

# Local imports
from spyder import version_info
import spyder.widgets.sourcecode.codeeditor as codeeditor


@pytest.fixture
def code_editor_bot(qtbot):
    """Create code editor with default Python code."""
    editor = codeeditor.CodeEditor(parent=None)
    indent_chars = ' ' * 4
    tab_stop_width_spaces = 4
    editor.setup_editor(language='Python', indent_chars=indent_chars,
                        tab_stop_width_spaces=tab_stop_width_spaces)
    # Mock the screen updates and signal emits to test when they've been
    # called.
    editor.linenumberarea = Mock()
    if version_info > (4, ):
        editor.sig_flags_changed = Mock()
    else:
        editor.get_linenumberarea_width = Mock(return_value=1)
    editor.breakpoints_changed = Mock()
    return editor, qtbot


# --- Tests
# -----------------------------------------------------------------------------
def test_delete(code_editor_bot, mocker):
    """Test CodeEditor.delete()."""
    editor, qtbot = code_editor_bot
    text = ('def f1(a, b):\n')
    editor.set_text(text)

    # Move to start and delete next character without selection.
    cursor = editor.textCursor()
    cursor.movePosition(QTextCursor.Start)
    editor.setTextCursor(cursor)
    editor.delete()
    assert editor.get_text_line(0) == 'ef f1(a, b):'

    # Delete selection.
    cursor = editor.textCursor()
    cursor.select(QTextCursor.WordUnderCursor)
    editor.setTextCursor(cursor)
    editor.delete()
    assert editor.get_text_line(0) == ' f1(a, b):'

    # Move to end of document - nothing to delete after cursor.
    cursor = editor.textCursor()
    cursor.movePosition(QTextCursor.End)
    editor.setTextCursor(cursor)
    editor.delete()
    assert editor.get_text_line(0) == ' f1(a, b):'


if __name__ == "__main__":
    pytest.main()