Fixed coverage

aiogram/utils/keyboard.py

@@ -106,7 +106,7 @@ class KeyboardBuilder(Generic[ButtonType], ABC):
                 f"not type {type(row).__name__}"
             )
         if len(row) > self.max_width:
-            raise ValueError(f"Row {row!r} is too long (MAX_WIDTH={self.max_width})")
+            raise ValueError(f"Row {row!r} is too long (max width: {self.max_width})")
         self._validate_buttons(*row)
         return True
 
@@ -144,14 +144,6 @@ class KeyboardBuilder(Generic[ButtonType], ABC):
             raise ValueError(f"Row size {size} are not allowed")
         return size
 
-    def copy(self: "KeyboardBuilder[ButtonType]") -> "KeyboardBuilder[ButtonType]":
-        """
-        Make full copy of current builder with markup
-
-        :return:
-        """
-        return self.__class__(self._button_type, markup=self.export())
-
     def export(self) -> List[List[ButtonType]]:
         """
         Export configured markup as list of lists of buttons

tests/test_utils/test_keyboard.py

@@ -78,27 +78,21 @@ class TestKeyboardBuilder:
                 row=[KeyboardButton(text=f"test {index}") for index in range(count)]
             )
 
-    def test_validate_markup(self):
+    def test_validate_markup_invalid_type(self):
         builder = ReplyKeyboardBuilder()
-
         with pytest.raises(ValueError):
             builder._validate_markup(markup=())
 
+    def test_validate_markup_too_many_buttons(self):
+        builder = ReplyKeyboardBuilder()
         with pytest.raises(ValueError):
             builder._validate_markup(
                 markup=[
-                    [KeyboardButton(text=f"{row}.{col}") for col in range(builder.max_width + 5)]
+                    [KeyboardButton(text=f"{row}.{col}") for col in range(builder.max_width)]
-                    for row in range(5)
+                    for row in range(builder.max_buttons)
                 ]
             )
 
-        assert builder._validate_markup(
-            markup=[
-                [KeyboardButton(text=f"{row}.{col}") for col in range(builder.max_width)]
-                for row in range(5)
-            ]
-        )
-
     def test_validate_size(self):
         builder = ReplyKeyboardBuilder()
         with pytest.raises(ValueError):