New Fetch

erlang/hello-world/include/exercism.hrl

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+-include_lib("eunit/include/eunit.hrl").
+
+sut(Module) ->
+  {ok, Files} = file:list_dir("./src"),
+  case lists:member("example.erl", Files) of
+    true  -> example;
+    false -> Module
+  end.
+
+version_test() ->
+  ?assertMatch(?TEST_VERSION, ?TESTED_MODULE:test_version()).

erlang/hello-world/rebar.config

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+%% Erlang compiler options
+{erl_opts, [debug_info]}.
+
+{deps, []}.
+
+{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, test_version/0]).
+
+hello() ->
+  undefined.
+
+test_version() -> 2.

erlang/hello-world/test/hello_world_tests.erl

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+-module(hello_world_tests).
+
+-define(TESTED_MODULE, (sut(hello_world))).
+-define(TEST_VERSION, 2).
+-include("exercism.hrl").
+
+
+say_hi_test() ->
+  ?assertEqual("Hello, World!", ?TESTED_MODULE:hello()).