test: some test coverage (#3)

* test: adds test coverage to Juggler.init

* ci: enables mix test

* build(deps): support elixir 1.15

* test description

.github/workflows/ci.yml

@@ -29,5 +29,4 @@ jobs:
       - run: mix deps.compile
       - run: mix compile --warnings-as-errors
         if: ${{ matrix.lint }}
-      # TODO
-      # - run: mix test
+      - run: mix test

mix.exs

@@ -5,7 +5,7 @@ defmodule Juggler.MixProject do
     [
       app: :juggler,
       version: "0.1.0",
-      elixir: "~> 1.16",
+      elixir: "~> 1.15",
       start_permanent: Mix.env() == :prod,
       deps: deps()
     ]

test/juggler_test.exs

@@ -2,7 +2,22 @@ defmodule JugglerTest do
   use ExUnit.Case
   doctest Juggler
 
-  test "greets the world" do
-    assert Juggler.hello() == :world
+  @tmp_path Path.expand("../tmp", __DIR__)
+
+  setup do
+    File.mkdir_p!(@tmp_path)
+    on_exit(fn -> File.rm_rf(@tmp_path) end)
+    :ok
+  end
+
+  test "init/0 generates juggles file" do
+    File.cd!(
+      @tmp_path,
+      fn ->
+        refute File.exists?("juggles.exs")
+        assert Juggler.init() == :ok
+        assert File.exists?("juggles.exs")
+      end
+    )
   end
 end