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pythonのunittestモジュールでテスト対象コード上のprint文を標準出力する

Last updated at Posted at 2024-04-17

unittestを書いているときもprintデバッグしたいときありますよね。私はあります。
そんなときのプラクティス

import io
import sys

class Case(unittest.TestCase):
    def setUp(self):
        # 標準出力退避
        self.original_stdout = sys.stdout
        # 標準出力をキャプチャするためのストリームをセットアップ
        sys.stdout = io.StringIO()

    def tearDown(self):
        # 標準出力を元に戻す
        output = sys.stdout.getvalue()
        sys.stdout = self.original_stdout
        # プリント
        print(output)
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