boilerplate layout 2

.formatter.exs

@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

lib/redeyes.ex

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+defmodule Redeyes.Router do
+  use Plug.Router
+
+  plug(Plug.Logger)
+  plug(:match)
+  plug(:dispatch)
+
+  post "/shorten" do
+    conn
+    |> send_resp(200, "Hello, world!")
+  end
+
+  get "/fetch" do
+    conn
+    |> send_resp(200, "Hello, world!")
+  end
+
+  match _ do
+    send_resp(conn, 404, "Not found")
+  end
+end

lib/redeyes/application.ex

@@ -0,0 +1,19 @@
+defmodule Redeyes.Application do
+  @moduledoc false
+
+  use Application
+
+  @impl true
+  def start(_type, _args) do
+    children = [
+      Plug.Cowboy.child_spec(
+        scheme: :http,
+        plug: Redeyes.Router,
+        options: [port: 4001]
+      )
+    ]
+
+    opts = [strategy: :one_for_one, name: Redeyes.Supervisor]
+    Supervisor.start_link(children, opts)
+  end
+end

mix.exs

@@ -0,0 +1,28 @@
+defmodule Redeyes.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :redeyes,
+      version: "0.1.0",
+      elixir: "~> 1.17",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger],
+      mod: {Redeyes.Application, []}
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      {:plug_cowboy, "~> 2.0"}
+    ]
+  end
+end

mix.lock

@@ -0,0 +1,11 @@
+%{
+  "cowboy": {:hex, :cowboy, "2.12.0", "f276d521a1ff88b2b9b4c54d0e753da6c66dd7be6c9fca3d9418b561828a3731", [:make, :rebar3], [{:cowlib, "2.13.0", [hex: :cowlib, repo: "hexpm", optional: false]}, {:ranch, "1.8.0", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm", "8a7abe6d183372ceb21caa2709bec928ab2b72e18a3911aa1771639bef82651e"},
+  "cowboy_telemetry": {:hex, :cowboy_telemetry, "0.4.0", "f239f68b588efa7707abce16a84d0d2acf3a0f50571f8bb7f56a15865aae820c", [:rebar3], [{:cowboy, "~> 2.7", [hex: :cowboy, repo: "hexpm", optional: false]}, {:telemetry, "~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "7d98bac1ee4565d31b62d59f8823dfd8356a169e7fcbb83831b8a5397404c9de"},
+  "cowlib": {:hex, :cowlib, "2.13.0", "db8f7505d8332d98ef50a3ef34b34c1afddec7506e4ee4dd4a3a266285d282ca", [:make, :rebar3], [], "hexpm", "e1e1284dc3fc030a64b1ad0d8382ae7e99da46c3246b815318a4b848873800a4"},
+  "mime": {:hex, :mime, "2.0.6", "8f18486773d9b15f95f4f4f1e39b710045fa1de891fada4516559967276e4dc2", [:mix], [], "hexpm", "c9945363a6b26d747389aac3643f8e0e09d30499a138ad64fe8fd1d13d9b153e"},
+  "plug": {:hex, :plug, "1.16.1", "40c74619c12f82736d2214557dedec2e9762029b2438d6d175c5074c933edc9d", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:plug_crypto, "~> 1.1.1 or ~> 1.2 or ~> 2.0", [hex: :plug_crypto, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "a13ff6b9006b03d7e33874945b2755253841b238c34071ed85b0e86057f8cddc"},
+  "plug_cowboy": {:hex, :plug_cowboy, "2.7.1", "87677ffe3b765bc96a89be7960f81703223fe2e21efa42c125fcd0127dd9d6b2", [:mix], [{:cowboy, "~> 2.7", [hex: :cowboy, repo: "hexpm", optional: false]}, {:cowboy_telemetry, "~> 0.3", [hex: :cowboy_telemetry, repo: "hexpm", optional: false]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "02dbd5f9ab571b864ae39418db7811618506256f6d13b4a45037e5fe78dc5de3"},
+  "plug_crypto": {:hex, :plug_crypto, "2.1.0", "f44309c2b06d249c27c8d3f65cfe08158ade08418cf540fd4f72d4d6863abb7b", [:mix], [], "hexpm", "131216a4b030b8f8ce0f26038bc4421ae60e4bb95c5cf5395e1421437824c4fa"},
+  "ranch": {:hex, :ranch, "1.8.0", "8c7a100a139fd57f17327b6413e4167ac559fbc04ca7448e9be9057311597a1d", [:make, :rebar3], [], "hexpm", "49fbcfd3682fab1f5d109351b61257676da1a2fdbe295904176d5e521a2ddfe5"},
+  "telemetry": {:hex, :telemetry, "1.2.1", "68fdfe8d8f05a8428483a97d7aab2f268aaff24b49e0f599faa091f1d4e7f61c", [:rebar3], [], "hexpm", "dad9ce9d8effc621708f99eac538ef1cbe05d6a874dd741de2e689c47feafed5"},
+}

test/redeyes_test.exs

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+defmodule RedeyesTest do
+  use ExUnit.Case, async: true
+  use Plug.Test
+
+  @opts Redeyes.Router.init([])
+
+  test "/fetch returns hello world" do
+    # Create a test connection
+    conn = conn(:get, "/fetch")
+
+    # Invoke the plug
+    conn = Redeyes.Router.call(conn, @opts)
+
+    # Assert the response and status
+    assert conn.state == :sent
+    assert conn.status == 200
+    assert conn.resp_body == "Hello, world!"
+  end
+
+  test "/shorten returns hello world" do
+    # Create a test connection
+    conn = conn(:post, "/shorten")
+
+    # Invoke the plug
+    conn = Redeyes.Router.call(conn, @opts)
+
+    # Assert the response and status
+    assert conn.state == :sent
+    assert conn.status == 200
+    assert conn.resp_body == "Hello, world!"
+  end
+
+  test "missing page returns 404" do
+    # Create a test connection
+    conn = conn(:get, "/missing")
+
+    # Invoke the plug
+    conn = Redeyes.Router.call(conn, @opts)
+
+    # Assert the response and status
+    assert conn.state == :sent
+    assert conn.status == 404
+    assert conn.resp_body == "Not found"
+  end
+end

test/test_helper.exs

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+ExUnit.start()