Python: reverse_string

python/reverse-string/.exercism/metadata.json

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+{"track":"python","exercise":"reverse-string","id":"595a9a9812204b1e92d19df286c22568","url":"https://exercism.io/my/solutions/595a9a9812204b1e92d19df286c22568","handle":"DmitryKokorin","is_requester":true,"auto_approve":false}

python/reverse-string/README.md

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+# Reverse String
+
+Reverse a string
+
+For example:
+input: "cool"
+output: "looc"
+
+
+## Exception messages
+
+Sometimes it is necessary to raise an exception. When you do this, you should include a meaningful error message to
+indicate what the source of the error is. This makes your code more readable and helps significantly with debugging. Not
+every exercise will require you to raise an exception, but for those that do, the tests will only pass if you include
+a message.
+
+To raise a message with an exception, just write it as an argument to the exception type. For example, instead of
+`raise Exception`, you should write:
+
+```python
+raise Exception("Meaningful message indicating the source of the error")
+```
+
+## Running the tests
+
+To run the tests, run `pytest reverse_string_test.py`
+
+Alternatively, you can tell Python to run the pytest module:
+`python -m pytest reverse_string_test.py`
+
+### Common `pytest` options
+
+- `-v` : enable verbose output
+- `-x` : stop running tests on first failure
+- `--ff` : run failures from previous test before running other test cases
+
+For other options, see `python -m pytest -h`
+
+## Submitting Exercises
+
+Note that, when trying to submit an exercise, make sure the solution is in the `$EXERCISM_WORKSPACE/python/reverse-string` directory.
+
+You can find your Exercism workspace by running `exercism debug` and looking for the line that starts with `Workspace`.
+
+For more detailed information about running tests, code style and linting,
+please see [Running the Tests](http://exercism.io/tracks/python/tests).
+
+## Source
+
+Introductory challenge to reverse an input string [https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb](https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb)
+
+## Submitting Incomplete Solutions
+
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

python/reverse-string/reverse_string.py

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+def reverse(text):
+    return text[::-1]

python/reverse-string/reverse_string_test.py

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+import unittest
+
+from reverse_string import reverse
+
+# Tests adapted from `problem-specifications//canonical-data.json`
+
+
+class ReverseStringTest(unittest.TestCase):
+    def test_an_empty_string(self):
+        self.assertEqual(reverse(""), "")
+
+    def test_a_word(self):
+        self.assertEqual(reverse("robot"), "tobor")
+
+    def test_a_capitalized_word(self):
+        self.assertEqual(reverse("Ramen"), "nemaR")
+
+    def test_a_sentence_with_punctuation(self):
+        self.assertEqual(reverse("I'm hungry!"), "!yrgnuh m'I")
+
+    def test_a_palindrome(self):
+        self.assertEqual(reverse("racecar"), "racecar")
+
+    def test_an_even_sized_word(self):
+        self.assertEqual(reverse("drawer"), "reward")
+
+
+if __name__ == "__main__":
+    unittest.main()