From 669cc7aebf5662b469ed0a2cde338c9088faf4f6 Mon Sep 17 00:00:00 2001
From: Julio Biason <julio.biason@pm.me>
Date: Thu, 16 Jul 2020 20:35:43 -0300
Subject: [PATCH] Hello World Elixir

---
 elixir/hello-world/README.md                 | 57 ++++++++++++++++++++
 elixir/hello-world/lib/hello_world.ex        |  9 ++++
 elixir/hello-world/mix.exs                   | 28 ++++++++++
 elixir/hello-world/test/hello_world_test.exs |  7 +++
 elixir/hello-world/test/test_helper.exs      |  2 +
 5 files changed, 103 insertions(+)
 create mode 100644 elixir/hello-world/README.md
 create mode 100644 elixir/hello-world/lib/hello_world.ex
 create mode 100644 elixir/hello-world/mix.exs
 create mode 100644 elixir/hello-world/test/hello_world_test.exs
 create mode 100644 elixir/hello-world/test/test_helper.exs

diff --git a/elixir/hello-world/README.md b/elixir/hello-world/README.md
new file mode 100644
index 0000000..5cf79d0
--- /dev/null
+++ b/elixir/hello-world/README.md
@@ -0,0 +1,57 @@
+# Hello World
+
+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.
+
+## Running tests
+
+Execute the tests with:
+
+```bash
+$ mix test
+```
+
+### Pending tests
+
+In the test suites, all but the first test have been skipped.
+
+Once you get a test passing, you can unskip the next one by
+commenting out the relevant `@tag :pending` with a `#` symbol.
+
+For example:
+
+```elixir
+# @tag :pending
+test "shouting" do
+  assert Bob.hey("WATCH OUT!") == "Whoa, chill out!"
+end
+```
+
+Or, you can enable all the tests by commenting out the
+`ExUnit.configure` line in the test suite.
+
+```elixir
+# ExUnit.configure exclude: :pending, trace: true
+```
+
+If you're stuck on something, it may help to look at some of
+the [available resources](https://exercism.io/tracks/elixir/resources)
+out there where answers might be found.
+
+## Source
+
+This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.
diff --git a/elixir/hello-world/lib/hello_world.ex b/elixir/hello-world/lib/hello_world.ex
new file mode 100644
index 0000000..3edfef7
--- /dev/null
+++ b/elixir/hello-world/lib/hello_world.ex
@@ -0,0 +1,9 @@
+defmodule HelloWorld do
+  @doc """
+  Simply returns "Hello, World!"
+  """
+  @spec hello :: String.t()
+  def hello do
+    "Hello, World!"
+  end
+end
diff --git a/elixir/hello-world/mix.exs b/elixir/hello-world/mix.exs
new file mode 100644
index 0000000..2ba5afc
--- /dev/null
+++ b/elixir/hello-world/mix.exs
@@ -0,0 +1,28 @@
+defmodule HelloWorld.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :hello_world,
+      version: "0.1.0",
+      # elixir: "~> 1.8",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      # {:dep_from_hexpm, "~> 0.3.0"},
+      # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
+    ]
+  end
+end
diff --git a/elixir/hello-world/test/hello_world_test.exs b/elixir/hello-world/test/hello_world_test.exs
new file mode 100644
index 0000000..cfd7952
--- /dev/null
+++ b/elixir/hello-world/test/hello_world_test.exs
@@ -0,0 +1,7 @@
+defmodule HelloWorldTest do
+  use ExUnit.Case
+
+  test "says 'Hello, World!'" do
+    assert HelloWorld.hello() == "Hello, World!"
+  end
+end
diff --git a/elixir/hello-world/test/test_helper.exs b/elixir/hello-world/test/test_helper.exs
new file mode 100644
index 0000000..35fc5bf
--- /dev/null
+++ b/elixir/hello-world/test/test_helper.exs
@@ -0,0 +1,2 @@
+ExUnit.start()
+ExUnit.configure(exclude: :pending, trace: true)