Fix colorize_terminal to clear preprocess data when the value changed

pytablewriter/writer/_table_writer.py

@@ -397,7 +397,7 @@ def __init__(self) -> None:
         self._style_filters = []  # type: List[StyleFilterFunc]
         self._styler = self._create_styler(self)
         self.style_filter_kwargs = {}  # type: Dict[str, Any]
-        self.colorize_terminal = True
+        self.__colorize_terminal = True
         self.__enable_ansi_escape = True
 
         self.max_workers = 1
@@ -489,6 +489,18 @@ def column_styles(self, value: Sequence[Optional[Style]]) -> None:
 
         self.__clear_preprocess()
 
+    @property
+    def colorize_terminal(self) -> bool:
+        return self.__colorize_terminal
+
+    @colorize_terminal.setter
+    def colorize_terminal(self, value: bool) -> None:
+        if self.__colorize_terminal == value:
+            return
+
+        self.__colorize_terminal = value
+        self.__clear_preprocess()
+
     @property
     def enable_ansi_escape(self) -> bool:
         return self.__enable_ansi_escape

test/writer/text/test_markdown_writer.py

@@ -817,6 +817,23 @@ def test_normal_ansi_style(self):
         assert regexp_ansi_escape.search(out)
         assert regexp_ansi_escape.sub("", out) == expected
 
+    def test_normal_colorize_terminal(self):
+        writer = table_writer_class()
+        writer.column_styles = [
+            Style(color="red"),
+            Style(bg_color="white"),
+        ]
+        writer.headers = ["fg color", "bg color"]
+        writer.value_matrix = [["hoge", "foo"]]
+
+        writer.colorize_terminal = True
+        out = writer.dumps()
+        assert regexp_ansi_escape.search(out)
+
+        writer.colorize_terminal = False
+        out = writer.dumps()
+        assert regexp_ansi_escape.search(out) is None
+
     def test_normal_enable_ansi_escape(self):
         writer = table_writer_class()
         writer.column_styles = [