Exercism: Hello world

erlang/hello-world/.eunit/hello_world.erl

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+-module(hello_world).
+
+-export([hello/0]).
+
+hello() ->
+  "Goodbye, Mars!".

erlang/hello-world/.eunit/hello_world_tests.erl

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+%% Generated with 'testgen v0.2.0'
+%% Revision 1 of the exercises generator was used
+%% https://github.com/exercism/problem-specifications/raw/42dd0cea20498fd544b152c4e2c0a419bb7e266a/exercises/hello-world/canonical-data.json
+%% This file is automatically generated from the exercises canonical data.
+
+-module(hello_world_tests).
+
+-include_lib("erl_exercism/include/exercism.hrl").
+-include_lib("eunit/include/eunit.hrl").
+
+
+-define(assertStringEqual(Expect, Expr),
+        begin ((fun () ->
+            __X = (Expect),
+            __Y = (Expr),
+            case string:equal(__X, __Y) of
+                true -> ok;
+                false -> erlang:error({assertStringEqual,
+                    [{module, ?MODULE},
+                     {line, ?LINE},
+                     {expression, (??Expr)},
+                     {expected, unicode:characters_to_list(__X)},
+                     {value, unicode:characters_to_list(__Y)}]})
+            end
+        end)())
+    end).
+
+-define(_assertStringEqual(Expect, Expr), ?_test(?assertStringEqual(Expect, Expr))).
+
+
+'1_say_hi_test_'() ->
+    {"Say Hi!",
+     ?_assertStringEqual("Hello, World!",
+			 hello_world:hello())}.

erlang/hello-world/.exercism/config.json

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+{
+  "blurb": "The classical introductory exercise. Just say \"Hello, World!\"",
+  "authors": [
+    "barberj"
+  ],
+  "contributors": [
+    "duffn",
+    "ErikSchierboom",
+    "iHiD",
+    "JordanAdams",
+    "juhlig",
+    "kytrinyx",
+    "NobbZ",
+    "tmcgilchrist",
+    "xymbol"
+  ],
+  "files": {
+    "solution": [
+      "src/hello_world.erl"
+    ],
+    "test": [
+      "test/hello_world_tests.erl"
+    ],
+    "example": [
+      ".meta/example.erl"
+    ]
+  },
+  "source": "This is an exercise to introduce users to using Exercism",
+  "source_url": "http://en.wikipedia.org/wiki/%22Hello,_world!%22_program"
+}

erlang/hello-world/.exercism/metadata.json

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+{"track":"erlang","exercise":"hello-world","id":"d3e91fc949c14f3b946bf72f8fabff37","url":"https://exercism.org/tracks/erlang/exercises/hello-world","handle":"JBiason","is_requester":true,"auto_approve":false}

erlang/hello-world/.qc/hello_world.erl

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+-module(hello_world).
+
+-export([hello/0]).
+
+hello() ->
+  "Goodbye, Mars!".

erlang/hello-world/.qc/hello_world_tests.erl

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+%% Generated with 'testgen v0.2.0'
+%% Revision 1 of the exercises generator was used
+%% https://github.com/exercism/problem-specifications/raw/42dd0cea20498fd544b152c4e2c0a419bb7e266a/exercises/hello-world/canonical-data.json
+%% This file is automatically generated from the exercises canonical data.
+
+-module(hello_world_tests).
+
+-include_lib("erl_exercism/include/exercism.hrl").
+-include_lib("eunit/include/eunit.hrl").
+
+
+-define(assertStringEqual(Expect, Expr),
+        begin ((fun () ->
+            __X = (Expect),
+            __Y = (Expr),
+            case string:equal(__X, __Y) of
+                true -> ok;
+                false -> erlang:error({assertStringEqual,
+                    [{module, ?MODULE},
+                     {line, ?LINE},
+                     {expression, (??Expr)},
+                     {expected, unicode:characters_to_list(__X)},
+                     {value, unicode:characters_to_list(__Y)}]})
+            end
+        end)())
+    end).
+
+-define(_assertStringEqual(Expect, Expr), ?_test(?assertStringEqual(Expect, Expr))).
+
+
+'1_say_hi_test_'() ->
+    {"Say Hi!",
+     ?_assertStringEqual("Hello, World!",
+			 hello_world:hello())}.

erlang/hello-world/HELP.md

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+# Help
+
+## Running the tests
+
+You can run the tests by running the following command from the exercise directory.
+
+```bash
+$ rebar3 eunit
+```
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit src/hello_world.erl` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Erlang track's documentation](https://exercism.org/docs/tracks/erlang)
+- [Exercism's support channel on gitter](https://gitter.im/exercism/support)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [Exercism related BEAM support channel on gitter](https://gitter.im/exercism/xerlang)
+- [Erlang Documentation](http://www.erlang.org/doc.html)
+- [Learn You Some Erlang for Great Good](http://learnyousomeerlang.com)
+- [StackOverflow](http://stackoverflow.com/)

erlang/hello-world/README.md

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+# Hello World
+
+Welcome to Hello World on Exercism's Erlang Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+The classical introductory exercise. Just say "Hello, World!".
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
+the traditional first program for beginning programming in a new language
+or environment.
+
+The objectives are simple:
+
+- Write a function that returns the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+## Source
+
+### Created by
+
+- @barberj
+
+### Contributed to by
+
+- @duffn
+- @ErikSchierboom
+- @iHiD
+- @JordanAdams
+- @juhlig
+- @kytrinyx
+- @NobbZ
+- @tmcgilchrist
+- @xymbol
+
+### Based on
+
+This is an exercise to introduce users to using Exercism - http://en.wikipedia.org/wiki/%22Hello,_world!%22_program

erlang/hello-world/rebar.config

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+%% Erlang compiler options
+{erl_opts, [debug_info, warnings_as_errors]}.
+
+{deps, [{erl_exercism, "0.1.2"}]}.
+
+{dialyzer, [
+  {warnings, [underspecs, no_return]},
+  {get_warnings, true},
+  {plt_apps, top_level_deps}, % top_level_deps | all_deps
+  {plt_extra_apps, []},
+  {plt_location, local}, % local | "/my/file/name"
+  {plt_prefix, "rebar3"},
+  {base_plt_apps, [stdlib, kernel, crypto]},
+  {base_plt_location, global}, % global | "/my/file/name"
+  {base_plt_prefix, "rebar3"}
+]}.
+
+%% eunit:test(Tests)
+{eunit_tests, []}.
+%% Options for eunit:test(Tests, Opts)
+{eunit_opts, [verbose]}.
+
+%% == xref ==
+
+{xref_warnings, true}.
+
+%% xref checks to run
+{xref_checks, [undefined_function_calls, undefined_functions,
+  locals_not_used, exports_not_used,
+  deprecated_function_calls, deprecated_functions]}.

erlang/hello-world/src/hello_world.app.src

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+{application, hello_world,
+  [{description, "exercism.io - hello-world"},
+    {vsn, "0.0.1"},
+    {modules, []},
+    {registered, []},
+    {applications, [kernel,
+      stdlib]},
+    {env, []}
+  ]}.

erlang/hello-world/src/hello_world.erl

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+-module(hello_world).
+
+-export([hello/0]).
+
+hello() ->
+  "Hello, World!".

erlang/hello-world/test/hello_world_tests.erl

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+%% Generated with 'testgen v0.2.0'
+%% Revision 1 of the exercises generator was used
+%% https://github.com/exercism/problem-specifications/raw/42dd0cea20498fd544b152c4e2c0a419bb7e266a/exercises/hello-world/canonical-data.json
+%% This file is automatically generated from the exercises canonical data.
+
+-module(hello_world_tests).
+
+-include_lib("erl_exercism/include/exercism.hrl").
+-include_lib("eunit/include/eunit.hrl").
+
+
+-define(assertStringEqual(Expect, Expr),
+        begin ((fun () ->
+            __X = (Expect),
+            __Y = (Expr),
+            case string:equal(__X, __Y) of
+                true -> ok;
+                false -> erlang:error({assertStringEqual,
+                    [{module, ?MODULE},
+                     {line, ?LINE},
+                     {expression, (??Expr)},
+                     {expected, unicode:characters_to_list(__X)},
+                     {value, unicode:characters_to_list(__Y)}]})
+            end
+        end)())
+    end).
+
+-define(_assertStringEqual(Expect, Expr), ?_test(?assertStringEqual(Expect, Expr))).
+
+
+'1_say_hi_test_'() ->
+    {"Say Hi!",
+     ?_assertStringEqual("Hello, World!",
+			 hello_world:hello())}.