diff --git a/python/reverse-string/.exercism/metadata.json b/python/reverse-string/.exercism/metadata.json new file mode 100644 index 0000000..3fc31ab --- /dev/null +++ b/python/reverse-string/.exercism/metadata.json @@ -0,0 +1 @@ +{"track":"python","exercise":"reverse-string","id":"595a9a9812204b1e92d19df286c22568","url":"https://exercism.io/my/solutions/595a9a9812204b1e92d19df286c22568","handle":"DmitryKokorin","is_requester":true,"auto_approve":false} \ No newline at end of file diff --git a/python/reverse-string/README.md b/python/reverse-string/README.md new file mode 100644 index 0000000..73d58f4 --- /dev/null +++ b/python/reverse-string/README.md @@ -0,0 +1,54 @@ +# 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. diff --git a/python/reverse-string/reverse_string.py b/python/reverse-string/reverse_string.py new file mode 100644 index 0000000..0f0a63f --- /dev/null +++ b/python/reverse-string/reverse_string.py @@ -0,0 +1,2 @@ +def reverse(text): + return text[::-1] diff --git a/python/reverse-string/reverse_string_test.py b/python/reverse-string/reverse_string_test.py new file mode 100644 index 0000000..18724a0 --- /dev/null +++ b/python/reverse-string/reverse_string_test.py @@ -0,0 +1,29 @@ +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()