Birth dates: Add tests

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

test/pleroma/user_test.exs

@@ -755,6 +755,54 @@ defmodule Pleroma.UserTest do
     end
   end
 
+  describe "user registration, with :birth_date_required and :birth_date_min_age" do
+    @full_user_data %{
+      bio: "A guy",
+      name: "my name",
+      nickname: "nick",
+      password: "test",
+      password_confirmation: "test",
+      email: "email@example.com"
+    }
+
+    setup do
+      clear_config([:instance, :birth_date_required], true)
+      clear_config([:instance, :birth_date_min_age], 18 * 365)
+    end
+
+    test "it passes when correct birth date is provided" do
+      today = Date.utc_today()
+      birth_date = Date.add(today, -19 * 365)
+
+      params =
+        @full_user_data
+        |> Map.put(:birth_date, birth_date)
+
+      changeset = User.register_changeset(%User{}, params)
+
+      assert changeset.valid?
+    end
+
+    test "it fails when birth date is not provided" do
+      changeset = User.register_changeset(%User{}, @full_user_data)
+
+      refute changeset.valid?
+    end
+
+    test "it fails when provided invalid birth date" do
+      today = Date.utc_today()
+      birth_date = Date.add(today, -17 * 365)
+
+      params =
+        @full_user_data
+        |> Map.put(:birth_date, birth_date)
+
+      changeset = User.register_changeset(%User{}, params)
+
+      refute changeset.valid?
+    end
+  end
+
   describe "get_or_fetch/1" do
     test "gets an existing user by nickname" do
       user = insert(:user)