Implement new exercise, two-fer

[kytrinyx]

In #548 we discussed a new exercise which is equivalent to the current hello-world exercise (which conditionally provides a name, or defaults to "world") in the string "hello, %s".

The conclusion was to implement a new exercise, two-fer.

• Title: Two Fer
• Slug: two-fer
• Template: "One for X, one for me." where X is either a name, or it defaults to "you".

Next steps:

• Create the exercise description and metadata in a new PR in this repository. See https://github.com/exercism/x-common/blob/master/CONTRIBUTING.md#implementing-a-completely-new-exercise for details
• Draft an issue that can be submitted to all the repositories that currently have a hello-world exercise, suggesting that hello-world be simplified as described in the discussion in I posit that hello-world is too complex for a first exercise. How do we deal with it? #520
• Get feedback on the issue text
• Submit it using blazon (there's some documentation about how to use blazon in https://github.com/exercism/docs/blob/master/contributing-to-language-tracks/improving-consistency-across-tracks.md, and an open issue about making that a stand-alone and more complete document in Specify that tests must be output in order docs#10)
• Close this issue (don't need to wait for all the tracks to implement it, since that is optional)

[amit-rastogi]

TwoferTest.scala throws a compilation error when running sbt test
test("no name given") {
Twofer.twofer() should be ("One for you, one for me.")
}
[error] Unspecified value parameter name.
[error] Twofer.twofer() should be ("One for you, one for me.")
[error] ^
[error] one error found
[error] (Test / compileIncremental) Compilation failed

Twofer.twofer() has the name parameter missing. On adding an empty name parameter error is resolved.

test("no name given") {
Twofer.twofer(name = "") should be ("One for you, one for me.")
}

[SaschaMann]

@amit-rastogi you may want to report that in the scala track repo. You're more likely to find help there because this repo is about the shared test cases, not the scala implementation, and the scala team might not notice the bug report here.

(cc @exercism/scala)

[heshamfm]

I am not sure if this is the right place to call for help. I am new to Pharo and trying to use exercism.io to practice. However, I failed to import the example code that I downloaded from https://exercism.io/my/solutions/2c59b5cf2508431baae6a5b95c85a720 into Pharo. I checked in the community and came to understand that Pharo is using a file format called Tonel, which is not the one used in Pharo-exercism. In order to work on Pharo track exercises, one must take it into a Pharo image.

Please advise.

[NobbZ]

As far as I understand the workflow for Pharo, you need to use some prepared Pharo image that does the downloads and submissions for you.

Please refer to the Pharo instructions on the website and open a complete new issue at GitHub.com/exercism/exercism

[heshamfm]

@NobbZ I found this repo https://github.com/exercism/pharo-smalltalk but if i understand correctly, it is for already experienced Pharo developers to contribute. I could not find instructions for freshers like myself.

[NobbZ]

You can ask your question how to work with the pharo track there, chances to find someone who can help you are highest there.

Also, have you followed instructions from https://exercism.io/tracks/pharo-smalltalk/installation, which asks you to run some magic invocation to install the exercism plugin into the Pharo IDE?

[IliasMariosG]

Hello,
in Python3 once I run the test by typing in pytest two_fer_test.py in my shell(zsh) the following is shown:

self = <two_fer_test.TwoFerTest testMethod=test_no_name_given>

    def test_no_name_given(self):
>       self.assertEqual(two_fer(), "One for you, one for me.")
E       TypeError: two_fer() missing 1 required positional argument: 'name'

two_fer_test.py:10: TypeError
======================================================================= short test summary info ========================================================================
FAILED two_fer_test.py::TwoFerTest::test_no_name_given - TypeError: two_fer() missing 1 required positional argument: 'name'

I am using pylint as well. It points to:
> self.assertEqual(two_fer(), "One for you, one for me.")

If I add an empty name, thus:
self.assertEqual(two_fer(""), "One for you, one for me.")
it passes - given that I change the conditional statement accordingly in a separate code file named two_fer.py:

if name == " ":
    return "One for you, one for me"