Add test coverage measuring

This adds excoveralls (which is the state of the art coverage tool) and
a `mix spec` command which will run the whole suite with an HTML export
of coverage.

Closes #37

config/test.exs

@@ -9,6 +9,7 @@ config :dpul_collections, DpulCollections.Repo,
   username: "postgres",
   password: "postgres",
   hostname: "localhost",
+  port: 5434,
   database: "dpul_collections_test#{System.get_env("MIX_TEST_PARTITION")}",
   pool: Ecto.Adapters.SQL.Sandbox,
   pool_size: System.schedulers_online() * 2

coveralls.json

@@ -0,0 +1,6 @@
+{
+  "coverage_options": {
+    "minimum_coverage": 100,
+    "floor_coverage": true
+  }
+}

mix.exs

@@ -9,7 +9,16 @@ defmodule DpulCollections.MixProject do
       elixirc_paths: elixirc_paths(Mix.env()),
       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,
+        "coveralls.cobertura": :test,
+        spec: :test
+      ]
     ]
   end
 
@@ -57,7 +66,8 @@ defmodule DpulCollections.MixProject do
       {:gettext, "~> 0.20"},
       {:jason, "~> 1.2"},
       {:dns_cluster, "~> 0.1.1"},
-      {:bandit, "~> 1.2"}
+      {:bandit, "~> 1.2"},
+      {:excoveralls, "~> 0.18", only: :test}
     ]
   end
 
@@ -79,7 +89,8 @@ defmodule DpulCollections.MixProject do
         "tailwind dpul_collections --minify",
         "esbuild dpul_collections --minify",
         "phx.digest"
-      ]
+      ],
+      spec: ["coveralls.html"]
     ]
   end
 end

mix.lock

@@ -7,6 +7,7 @@
   "ecto": {:hex, :ecto, "3.11.2", "e1d26be989db350a633667c5cda9c3d115ae779b66da567c68c80cfb26a8c9ee", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "3c38bca2c6f8d8023f2145326cc8a80100c3ffe4dcbd9842ff867f7fc6156c65"},
   "ecto_sql": {:hex, :ecto_sql, "3.11.2", "c7cc7f812af571e50b80294dc2e535821b3b795ce8008d07aa5f336591a185a8", [:mix], [{:db_connection, "~> 2.4.1 or ~> 2.5", [hex: :db_connection, repo: "hexpm", optional: false]}, {:ecto, "~> 3.11.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:myxql, "~> 0.6.0", [hex: :myxql, repo: "hexpm", optional: true]}, {:postgrex, "~> 0.16 or ~> 1.0", [hex: :postgrex, repo: "hexpm", optional: true]}, {:tds, "~> 2.1.1 or ~> 2.2", [hex: :tds, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.0 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "73c07f995ac17dbf89d3cfaaf688fcefabcd18b7b004ac63b0dc4ef39499ed6b"},
   "esbuild": {:hex, :esbuild, "0.8.1", "0cbf919f0eccb136d2eeef0df49c4acf55336de864e63594adcea3814f3edf41", [:mix], [{:castore, ">= 0.0.0", [hex: :castore, repo: "hexpm", optional: false]}, {:jason, "~> 1.4", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "25fc876a67c13cb0a776e7b5d7974851556baeda2085296c14ab48555ea7560f"},
+  "excoveralls": {:hex, :excoveralls, "0.18.1", "a6f547570c6b24ec13f122a5634833a063aec49218f6fff27de9df693a15588c", [:mix], [{:castore, "~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}], "hexpm", "d65f79db146bb20399f23046015974de0079668b9abb2f5aac074d078da60b8d"},
   "expo": {:hex, :expo, "0.5.2", "beba786aab8e3c5431813d7a44b828e7b922bfa431d6bfbada0904535342efe2", [:mix], [], "hexpm", "8c9bfa06ca017c9cb4020fabe980bc7fdb1aaec059fd004c2ab3bff03b1c599c"},
   "file_system": {:hex, :file_system, "1.0.0", "b689cc7dcee665f774de94b5a832e578bd7963c8e637ef940cd44327db7de2cd", [:mix], [], "hexpm", "6752092d66aec5a10e662aefeed8ddb9531d79db0bc145bb8c40325ca1d8536d"},
   "finch": {:hex, :finch, "0.18.0", "944ac7d34d0bd2ac8998f79f7a811b21d87d911e77a786bc5810adb75632ada4", [:mix], [{:castore, "~> 0.1 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: false]}, {:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.3", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4 or ~> 1.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 0.2.6 or ~> 1.0", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "69f5045b042e531e53edc2574f15e25e735b522c37e2ddb766e15b979e03aa65"},