Answer to Question #127249 in Python for Jean De Dieu

Question

How to make a script file and a plain text output file (.txt) that contains the test output?

Answer 1

Since you did not provide any specific case, I'll lay out some general cases. Ask for any clarifications.

The Python-only way

• A modern Python installation comes with the IDLE IDE. Launch IDLE.
• Go to File > New File. This will create a new file.
• Write your code.

For writing output to a file, use the following code snippet:

with open('filename') as f:
    f.writelines(["first line", "second line"])  # the argument must be a list of strings

The un-Python way

Write your code the normal way, taking input and writing output the normal way. Run the code as:

python yourscript.py < inputfile.txt > outputfile.txt

The inputfile.txt is for your optional input and outputfile.txt will contain your (test) output. This is called I/O Redirection (https://linuxcommand.org/lc3_lts0070.php).

unittest

If you are using unittest, write your test file.

class MyTest(unittest.TestCase):  # should be a subclass of TestCase
    def test_foo(self):
        self.assertEqual('first', 'second')  # OK if both are equal
        self.assertTrue(True)  # OK if argument is false. Similarly, you've assertFalse

You can use the command line to run

python -m unittest testfile
python -m unittest testfile.TestClass
python -m unittest testfile.TestClass.test_method

This will run the specific test cases. You can use I/O redirection as before to write output to a file.