Add test coverage report via coveralls.io

Author: dkarter

.circleci/config.yml

@@ -24,6 +24,6 @@ jobs:
       - run: mix phx.digest
       - run: mix format --check-formatted
       - run: mix credo
-      - run: mix test
+      - run: mix coveralls.circle
       - store_artifacts:
           path: /home/circleci/tilex/screenshots

.gitignore

@@ -30,5 +30,8 @@ erl_crash.dump
 
 /tmp
 
+# coveralls output
+/cover
+
 /priv/static/js/app.js
 /priv/static/js/app.js.map

README.md

@@ -1,6 +1,6 @@
 # Tilex - Today I Learned in Elixir
 
-[![CircleCI](https://circleci.com/gh/hashrocket/tilex.svg?style=svg)](https://circleci.com/gh/hashrocket/tilex)
+[![CircleCI](https://circleci.com/gh/hashrocket/tilex.svg?style=svg)](https://circleci.com/gh/hashrocket/tilex) [![Coverage Status](https://coveralls.io/repos/github/hashrocket/tilex/badge.svg?branch=master)](https://coveralls.io/github/hashrocket/tilex?branch=master)
 
 > Today I Learned is an open-source project by the team at
 > [Hashrocket](https://hashrocket.com/) that catalogues the sharing &

coveralls.json

@@ -0,0 +1,13 @@
+{
+  "skip_files": [
+    "lib/mix/tasks",
+    "lib/test",
+    "lib/tilex/repo.ex",
+    "lib/tilex_web.ex",
+    "lib/tilex_web/channels/user_socket.ex",
+    "lib/tilex_web/endpoint.ex",
+    "lib/tilex_web/gettext.ex",
+    "lib/tilex_web/router.ex",
+    "test/support"
+  ]
+}

mix.exs

@@ -11,7 +11,14 @@ defmodule Tilex.Mixfile do
       build_embedded: Mix.env() == :prod,
       start_permanent: Mix.env() == :prod,
       aliases: aliases(),
-      deps: deps()
+      deps: deps(),
+      test_coverage: [tool: ExCoveralls],
+      preferred_cli_env: [
+        coveralls: :test,
+        "coveralls.detail": :test,
+        "coveralls.post": :test,
+        "coveralls.html": :test
+      ]
     ]
   end
 
@@ -38,6 +45,7 @@ defmodule Tilex.Mixfile do
       {:credo, "~> 1.1.0", only: [:dev, :test], runtime: false},
       {:earmark, "~> 1.3.2"},
       {:ecto_sql, "~> 3.0"},
+      {:excoveralls, "~> 0.10", only: :test},
       {:extwitter, "~> 0.8"},
       {:floki, "~> 0.21.0"},
       {:gettext, "~> 0.13"},

mix.lock

@@ -18,6 +18,7 @@
   "ecto": {:hex, :ecto, "3.1.7", "fa21d06ef56cdc2fdaa62574e8c3ba34a2751d44ea34c30bc65f0728421043e5", [:mix], [{:decimal, "~> 1.6", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm"},
   "ecto_sql": {:hex, :ecto_sql, "3.1.6", "1e80e30d16138a729c717f73dcb938590bcdb3a4502f3012414d0cbb261045d8", [:mix], [{:db_connection, "~> 2.0", [hex: :db_connection, repo: "hexpm", optional: false]}, {:ecto, "~> 3.1.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:mariaex, "~> 0.9.1", [hex: :mariaex, repo: "hexpm", optional: true]}, {:myxql, "~> 0.2.0", [hex: :myxql, repo: "hexpm", optional: true]}, {:postgrex, "~> 0.14.0 or ~> 0.15.0", [hex: :postgrex, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm"},
   "eternal": {:hex, :eternal, "1.2.1", "d5b6b2499ba876c57be2581b5b999ee9bdf861c647401066d3eeed111d096bc4", [:mix], [], "hexpm"},
+  "excoveralls": {:hex, :excoveralls, "0.11.2", "0c6f2c8db7683b0caa9d490fb8125709c54580b4255ffa7ad35f3264b075a643", [:mix], [{:hackney, "~> 1.0", [hex: :hackney, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm"},
   "extwitter": {:hex, :extwitter, "0.8.0", "1de29ba0b75c9cdbbbb936302ebfae2635ab42b6530a404c0e24f7acfe062fc1", [:mix], [{:oauther, "~> 1.1", [hex: :oauther, repo: "hexpm", optional: false]}, {:poison, "~> 2.0", [hex: :poison, repo: "hexpm", optional: false]}], "hexpm"},
   "file_system": {:hex, :file_system, "0.2.7", "e6f7f155970975789f26e77b8b8d8ab084c59844d8ecfaf58cbda31c494d14aa", [:mix], [], "hexpm"},
   "floki": {:hex, :floki, "0.21.0", "0c0191a6dbc559300bac232f716c55fb5738d45ae846b3141b19e5f5741c1907", [:mix], [{:html_entities, "~> 0.4.0", [hex: :html_entities, repo: "hexpm", optional: false]}, {:mochiweb, "~> 2.15", [hex: :mochiweb, repo: "hexpm", optional: false]}], "hexpm"},