First mouse interaction test

kitty_tests/mouse.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+# vim:fileencoding=utf-8
+# License: GPL v3 Copyright: 2016, Kovid Goyal <kovid at kovidgoyal.net>
+
+from functools import partial
+
+from kitty.fast_data_types import (
+    create_mock_window, send_mock_mouse_event_to_window, GLFW_MOUSE_BUTTON_LEFT
+)
+
+from . import BaseTest
+
+
+def send_mouse_event(window, button=-1, modifiers=0, is_release=False, x=0, y=0):
+    send_mock_mouse_event_to_window(window, button, modifiers, is_release, x, y)
+
+
+class TestMouse(BaseTest):
+
+    def test_mouse_selection(self):
+        s = self.create_screen()
+        w = create_mock_window(s)
+        ev = partial(send_mouse_event, w)
+
+        def sel():
+            return s.text_for_selection()[0]
+
+        def init():
+            s.reset()
+            s.draw('12345')
+            s.draw('67890')
+            s.draw('abcde')
+            s.draw('fghij')
+            s.draw('klmno')
+
+        init()
+        ev(GLFW_MOUSE_BUTTON_LEFT)
+        ev(x=3)
+        self.ae(sel(), '1234')
+        ev(GLFW_MOUSE_BUTTON_LEFT, x=3, is_release=True)
+        self.ae(sel(), '1234')