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# Two Fer `Two-fer` or `2-fer` is short for two for one. One for you and one for me. ```text "One for X, one for me." ``` When X is a name or "you". If the given name is "Alice", the result should be "One for Alice, one for me." If no name is given, the result should be "One for you, one for me." ## Running tests In order to run the tests, issue the following command from the exercise directory: For running the tests provided, `rebar3` is used as it is the official build and dependency management tool for erlang now. Please refer to [the tracks installation instructions](http://exercism.io/languages/erlang/installation) on how to do that. In order to run the tests, you can issue the following command from the exercise directory. ```bash $ rebar3 eunit ``` ### Test versioning Each problem defines a macro `TEST_VERSION` in the test file and verifies that the solution defines and exports a function `test_version` returning that same value. To make tests pass, add the following to your solution: ```erlang -export([test_version/0]). test_version() -> 1. ``` The benefit of this is that reviewers can see against which test version an iteration was written if, for example, a previously posted solution does not solve the current problem or passes current tests. ## Questions? For detailed information about the Erlang track, please refer to the [help page](http://exercism.io/languages/erlang) on the Exercism site. This covers the basic information on setting up the development environment expected by the exercises. ## Source [https://en.wikipedia.org/wiki/Two-fer](https://en.wikipedia.org/wiki/Two-fer) ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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