Add unit tests for saving/loading credentials

lib/hunter/application.ex

@@ -87,7 +87,7 @@ defmodule Hunter.Application do
     * `name` - application name
 
   """
-  @spec load_credentials(String.t()) :: Hunter.Application.t()
+  @spec load_credentials(String.t()) :: Hunter.Application.t() | no_return
   def load_credentials(name) do
     Hunter.Config.home()
     |> Path.join("apps/#{name}.json")

lib/hunter/config.ex

@@ -39,7 +39,8 @@ defmodule Hunter.Config do
 
   """
   def home do
-    Path.expand(System.get_env("HUNTER_HOME") || "~/.hunter")
+    home = System.get_env("HUNTER_HOME") || Application.get_env(:hunter, :home, "~/.hunter")
+    Path.expand(home)
   end
 
   @doc """

test/hunter/application_test.exs

@@ -3,17 +3,15 @@ defmodule Hunter.ApplicationTest do
 
   import Mox
 
-  alias Hunter.Application
-
   setup :verify_on_exit!
 
   test "should allow to create an app" do
     expect(Hunter.ApiMock, :create_app, fn _client, _redirect, _scopes, _website, _opts ->
-      %Application{client_id: "1234567890", client_secret: "1234567890", id: 1234}
+      %Hunter.Application{client_id: "1234567890", client_secret: "1234567890", id: 1234}
     end)
 
-    assert %Application{client_id: "1234567890", client_secret: "1234567890", id: 1234} ==
-             Application.create_app(
+    assert %Hunter.Application{client_id: "1234567890", client_secret: "1234567890", id: 1234} ==
+             Hunter.Application.create_app(
                "hunter",
                "urn:ietf:wg:oauth:2.0:oob",
                ["read", "write", "follow"],
@@ -22,4 +20,49 @@ defmodule Hunter.ApplicationTest do
                api_base_url: "https://example.com"
              )
   end
+
+  test "should allow to store credentials on home directory" do
+    expect(Hunter.ApiMock, :create_app, fn _client, _redirect, _scopes, _website, _opts ->
+      %Hunter.Application{client_id: "1234567890", client_secret: "1234567890", id: 1234}
+    end)
+
+    home = Hunter.Config.home()
+    tmp_dir = Path.expand("../../tmp", __DIR__)
+    Application.put_env(:hunter, :home, tmp_dir)
+    app_name = "hunter"
+
+    assert %Hunter.Application{client_id: "1234567890", client_secret: "1234567890", id: 1234} =
+             result =
+             Hunter.Application.create_app(
+               app_name,
+               "urn:ietf:wg:oauth:2.0:oob",
+               ["read"],
+               nil,
+               save?: true,
+               api_base_url: "https://example.com"
+             )
+
+    assert result == Hunter.Application.load_credentials(app_name)
+    Application.put_env(:hunter, :home, home)
+  end
+
+  test "should allow to load persisted app's credentials" do
+    home = Hunter.Config.home()
+    tmp_dir = Path.expand("../../tmp", __DIR__)
+    app_dir = Path.join(tmp_dir, "apps")
+    app_name = "load"
+    Application.put_env(:hunter, :home, tmp_dir)
+
+    expected = %{id: 1234, client_secret: "1234567890", client_id: "1234567890"}
+
+    unless File.exists?(app_dir), do: File.mkdir_p!(app_dir)
+
+    File.write!("#{app_dir}/#{app_name}.json", Poison.encode!(expected))
+
+    assert %Hunter.Application{} = app = Hunter.Application.load_credentials(app_name)
+
+    assert Map.equal?(Map.from_struct(app), expected)
+
+    Application.put_env(:hunter, :home, home)
+  end
 end

test/test_helper.exs

@@ -1,3 +1,9 @@
 ExUnit.start()
 Mox.defmock(Hunter.ApiMock, for: Hunter.Api)
 Application.put_env(:hunter, :hunter_api, Hunter.ApiMock)
+
+ExUnit.after_suite(fn _ ->
+  "../tmp"
+  |> Path.expand(__DIR__)
+  |> File.rm_rf()
+end)