добавил юниттесты

test.py

@@ -0,0 +1,77 @@
+import unittest
+from mvc.models import VimModel
+from mystring import MyString as MyString
+
+class TestVimModel(unittest.TestCase):
+    def setUp(self):
+        self.model = VimModel(displayLinesCount=10, displayColsCount=80)
+        self.model.displayBuffer = [MyString("line 1"), MyString("line 2")]
+
+    def test_initial_state(self):
+        self.assertEqual(self.model.currentLine, 0)
+        self.assertEqual(self.model.currentCol, 0)
+        self.assertEqual(len(self.model.displayBuffer), 2)
+
+    def test_insert_symbol(self):
+        self.model.InsertSymbol(ord('a'))
+        self.assertEqual(self.model.displayBuffer[0].data(), "aline 1")
+        self.assertEqual(self.model.currentCol, 1)
+
+    def test_move_right(self):
+        self.model.currentCol = 5
+        self.model.MoveRight()
+        self.assertEqual(self.model.currentCol, 6)
+
+    def test_move_left(self):
+        self.model.currentCol = 5
+        self.model.MoveLeft()
+        self.assertEqual(self.model.currentCol, 4)
+
+    def test_move_up(self):
+        self.model.currentLine = 1
+        self.model.MoveUp()
+        self.assertEqual(self.model.currentLine, 0)
+
+    def test_move_down(self):
+        self.model.MoveDown()
+        self.assertEqual(self.model.currentLine, 1)
+
+    def test_backspace(self):
+        self.model.currentCol = 5
+        self.model.Backspace()
+        self.assertEqual(self.model.displayBuffer[0].data(), "line1")
+        self.assertEqual(self.model.currentCol, 4)
+
+    def test_enter(self):
+        self.model.currentCol = 5
+        self.model.Enter()
+        self.assertEqual(len(self.model.displayBuffer), 3)
+        self.assertEqual(self.model.displayBuffer[0].data(), "line ")
+        self.assertEqual(self.model.displayBuffer[1].data(), "1")
+        self.assertEqual(self.model.currentLine, 1)
+        self.assertEqual(self.model.currentCol, 0)
+
+    def test_to_line_start(self):
+        self.model.currentCol = 5
+        self.model.ToLineStart()
+        self.assertEqual(self.model.currentCol, 0)
+
+    def test_to_line_end(self):
+        self.model.ToLineEnd()
+        self.assertEqual(self.model.currentCol, len(self.model.displayBuffer[0]))
+
+    def test_save_file(self):
+        self.model.SaveFile()
+        with open("testfile.txt", "r") as file:
+            lines = file.readlines()
+        self.assertEqual(lines[0].strip(), "line 1")
+        self.assertEqual(lines[1].strip(), "line 2")
+
+    def test_load_file(self):
+        self.model.LoadFile("testfile.txt")
+        self.assertEqual(len(self.model.displayBuffer), 2)
+        self.assertEqual(self.model.displayBuffer[0].data(), "line 1")
+        self.assertEqual(self.model.displayBuffer[1].data(), "line 2")
+
+if __name__ == '__main__':
+    unittest.main()

testfile.txt

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+line 1
+line 2