creating trusted app from adminFE & mix task

test/tasks/app_test.exs

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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Mix.Tasks.Pleroma.AppTest do
+  use Pleroma.DataCase, async: true
+
+  setup_all do
+    Mix.shell(Mix.Shell.Process)
+
+    on_exit(fn ->
+      Mix.shell(Mix.Shell.IO)
+    end)
+  end
+
+  describe "creates new app" do
+    test "with default scopes" do
+      name = "Some name"
+      redirect = "https://example.com"
+      Mix.Tasks.Pleroma.App.run(["create", "-n", name, "-r", redirect])
+
+      assert_app(name, redirect, ["read", "write", "follow", "push"])
+    end
+
+    test "with custom scopes" do
+      name = "Another name"
+      redirect = "https://example.com"
+
+      Mix.Tasks.Pleroma.App.run([
+        "create",
+        "-n",
+        name,
+        "-r",
+        redirect,
+        "-s",
+        "read,write,follow,push,admin"
+      ])
+
+      assert_app(name, redirect, ["read", "write", "follow", "push", "admin"])
+    end
+  end
+
+  test "with errors" do
+    Mix.Tasks.Pleroma.App.run(["create"])
+    {:mix_shell, :error, ["Creating failed:"]}
+    {:mix_shell, :error, ["name: can't be blank"]}
+    {:mix_shell, :error, ["redirect_uris: can't be blank"]}
+  end
+
+  defp assert_app(name, redirect, scopes) do
+    app = Repo.get_by(Pleroma.Web.OAuth.App, client_name: name)
+
+    assert_received {:mix_shell, :info, [message]}
+    assert message == "#{name} successfully created:"
+
+    assert_received {:mix_shell, :info, [message]}
+    assert message == "App client_id: #{app.client_id}"
+
+    assert_received {:mix_shell, :info, [message]}
+    assert message == "App client_secret: #{app.client_secret}"
+
+    assert app.scopes == scopes
+    assert app.redirect_uris == redirect
+  end
+end