Fixup OAuth [wip]tests/openapi-oauth

3 files changed, 815 insertions, 747 deletions

diff --git a/test/pleroma/web/o_auth/ldap_authorization_test.exs b/test/pleroma/web/o_auth/ldap_authorization_test.exs
index a839ed4a7..ae5ffcf41 100644
--- a/test/pleroma/web/o_auth/ldap_authorization_test.exs
+++ b/test/pleroma/web/o_auth/ldap_authorization_test.exs
@@ -37,13 +37,17 @@ defmodule Pleroma.Web.OAuth.LDAPAuthorizationTest do
     ] do
       conn =
         build_conn()
-        |> post("/oauth/token?#{URI.encode_query(%{
-          "grant_type" => "password",
-          "username" => user.nickname,
-          "password" => password,
-          "client_id" => app.client_id,
-          "client_secret" => app.client_secret
-        })}")
+        |> post(
+          "/oauth/token?#{
+            URI.encode_query(%{
+              "grant_type" => "password",
+              "username" => user.nickname,
+              "password" => password,
+              "client_id" => app.client_id,
+              "client_secret" => app.client_secret
+            })
+          }"
+        )
 
       assert %{"access_token" => token} = json_response_and_validate_schema(conn, 200)
 
@@ -81,13 +85,17 @@ defmodule Pleroma.Web.OAuth.LDAPAuthorizationTest do
     ] do
       conn =
         build_conn()
-        |> post("/oauth/token?#{URI.encode_query(%{
-          "grant_type" => "password",
-          "username" => user.nickname,
-          "password" => password,
-          "client_id" => app.client_id,
-          "client_secret" => app.client_secret
-        })}")
+        |> post(
+          "/oauth/token?#{
+            URI.encode_query(%{
+              "grant_type" => "password",
+              "username" => user.nickname,
+              "password" => password,
+              "client_id" => app.client_id,
+              "client_secret" => app.client_secret
+            })
+          }"
+        )
 
       assert %{"access_token" => token} = json_response_and_validate_schema(conn, 200)
 
@@ -120,13 +128,17 @@ defmodule Pleroma.Web.OAuth.LDAPAuthorizationTest do
     ] do
       conn =
         build_conn()
-        |> post("/oauth/token?#{URI.encode_query(%{
-          "grant_type" => "password",
-          "username" => user.nickname,
-          "password" => password,
-          "client_id" => app.client_id,
-          "client_secret" => app.client_secret
-        })}")
+        |> post(
+          "/oauth/token?#{
+            URI.encode_query(%{
+              "grant_type" => "password",
+              "username" => user.nickname,
+              "password" => password,
+              "client_id" => app.client_id,
+              "client_secret" => app.client_secret
+            })
+          }"
+        )
 
       assert %{"error" => "Invalid credentials"} = json_response_and_validate_schema(conn, 400)
       assert_received :close_connection
diff --git a/test/pleroma/web/o_auth/o_auth_browser_controller_test.exs b/test/pleroma/web/o_auth/o_auth_browser_controller_test.exs
new file mode 100644
index 000000000..278af5d95
--- /dev/null
+++ b/test/pleroma/web/o_auth/o_auth_browser_controller_test.exs
@@ -0,0 +1,576 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.OAuth.OAuthBrowserControllerTest do
+  use Pleroma.Web.ConnCase
+
+  import Pleroma.Factory
+
+  alias Pleroma.Helpers.AuthHelper
+  alias Pleroma.MFA
+  alias Pleroma.MFA.TOTP
+  alias Pleroma.Repo
+  alias Pleroma.Web.OAuth.Authorization
+  alias Pleroma.Web.OAuth.OAuthController
+
+  @session_opts [
+    store: :cookie,
+    key: "_test",
+    signing_salt: "cooldude"
+  ]
+  setup do
+    clear_config([:instance, :account_activation_required])
+    clear_config([:instance, :account_approval_required])
+  end
+
+  describe "in OAuth consumer mode, " do
+    setup do
+      [
+        app: insert(:oauth_app),
+        conn:
+          build_conn()
+          |> Plug.Session.call(Plug.Session.init(@session_opts))
+          |> fetch_session()
+      ]
+    end
+
+    setup do: clear_config([:auth, :oauth_consumer_strategies], ~w(twitter facebook))
+
+    test "GET /oauth/prepare_request encodes parameters as `state` and redirects", %{
+      app: app,
+      conn: conn
+    } do
+      conn =
+        get(
+          conn,
+          "/oauth/prepare_request",
+          %{
+            "provider" => "twitter",
+            "authorization" => %{
+              "scope" => "read follow",
+              "client_id" => app.client_id,
+              "redirect_uri" => OAuthController.default_redirect_uri(app),
+              "state" => "a_state"
+            }
+          }
+        )
+
+      assert html_response(conn, 302)
+
+      redirect_query = URI.parse(redirected_to(conn)).query
+      assert %{"state" => state_param} = URI.decode_query(redirect_query)
+      assert {:ok, state_components} = Jason.decode(state_param)
+
+      expected_client_id = app.client_id
+      expected_redirect_uri = app.redirect_uris
+
+      assert %{
+               "scope" => "read follow",
+               "client_id" => ^expected_client_id,
+               "redirect_uri" => ^expected_redirect_uri,
+               "state" => "a_state"
+             } = state_components
+    end
+
+    test "with user-bound registration, GET /oauth/<provider>/callback redirects to `redirect_uri` with `code`",
+         %{app: app, conn: conn} do
+      registration = insert(:registration)
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      state_params = %{
+        "scope" => Enum.join(app.scopes, " "),
+        "client_id" => app.client_id,
+        "redirect_uri" => redirect_uri,
+        "state" => ""
+      }
+
+      conn =
+        conn
+        |> assign(:ueberauth_auth, %{provider: registration.provider, uid: registration.uid})
+        |> get(
+          "/oauth/twitter/callback",
+          %{
+            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
+            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
+            "provider" => "twitter",
+            "state" => Jason.encode!(state_params)
+          }
+        )
+
+      assert html_response(conn, 302)
+      assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
+    end
+
+    test "with user-unbound registration, GET /oauth/<provider>/callback renders registration_details page",
+         %{app: app, conn: conn} do
+      user = insert(:user)
+
+      state_params = %{
+        "scope" => "read write",
+        "client_id" => app.client_id,
+        "redirect_uri" => OAuthController.default_redirect_uri(app),
+        "state" => "a_state"
+      }
+
+      conn =
+        conn
+        |> assign(:ueberauth_auth, %{
+          provider: "twitter",
+          uid: "171799000",
+          info: %{nickname: user.nickname, email: user.email, name: user.name, description: nil}
+        })
+        |> get(
+          "/oauth/twitter/callback",
+          %{
+            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
+            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
+            "provider" => "twitter",
+            "state" => Jason.encode!(state_params)
+          }
+        )
+
+      assert response = html_response(conn, 200)
+      assert response =~ ~r/name="op" type="submit" value="register"/
+      assert response =~ ~r/name="op" type="submit" value="connect"/
+      assert response =~ user.email
+      assert response =~ user.nickname
+    end
+
+    test "on authentication error, GET /oauth/<provider>/callback redirects to `redirect_uri`", %{
+      app: app,
+      conn: conn
+    } do
+      state_params = %{
+        "scope" => Enum.join(app.scopes, " "),
+        "client_id" => app.client_id,
+        "redirect_uri" => OAuthController.default_redirect_uri(app),
+        "state" => ""
+      }
+
+      conn =
+        conn
+        |> assign(:ueberauth_failure, %{errors: [%{message: "(error description)"}]})
+        |> get(
+          "/oauth/twitter/callback",
+          %{
+            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
+            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
+            "provider" => "twitter",
+            "state" => Jason.encode!(state_params)
+          }
+        )
+
+      assert html_response(conn, 302)
+      assert redirected_to(conn) == app.redirect_uris
+      assert get_flash(conn, :error) == "Failed to authenticate: (error description)."
+    end
+
+    test "GET /oauth/registration_details renders registration details form", %{
+      app: app,
+      conn: conn
+    } do
+      conn =
+        get(
+          conn,
+          "/oauth/registration_details",
+          %{
+            "authorization" => %{
+              "scopes" => app.scopes,
+              "client_id" => app.client_id,
+              "redirect_uri" => OAuthController.default_redirect_uri(app),
+              "state" => "a_state",
+              "nickname" => nil,
+              "email" => "john@doe.com"
+            }
+          }
+        )
+
+      assert response = html_response(conn, 200)
+      assert response =~ ~r/name="op" type="submit" value="register"/
+      assert response =~ ~r/name="op" type="submit" value="connect"/
+    end
+
+    test "with valid params, POST /oauth/register?op=register redirects to `redirect_uri` with `code`",
+         %{
+           app: app,
+           conn: conn
+         } do
+      registration = insert(:registration, user: nil, info: %{"nickname" => nil, "email" => nil})
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      conn =
+        conn
+        |> put_session(:registration_id, registration.id)
+        |> post(
+          "/oauth/register",
+          %{
+            "op" => "register",
+            "authorization" => %{
+              "scopes" => app.scopes,
+              "client_id" => app.client_id,
+              "redirect_uri" => redirect_uri,
+              "state" => "a_state",
+              "nickname" => "availablenick",
+              "email" => "available@email.com"
+            }
+          }
+        )
+
+      assert html_response(conn, 302)
+      assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
+    end
+
+    test "with unlisted `redirect_uri`, POST /oauth/register?op=register results in HTTP 401",
+         %{
+           app: app,
+           conn: conn
+         } do
+      registration = insert(:registration, user: nil, info: %{"nickname" => nil, "email" => nil})
+      unlisted_redirect_uri = "http://cross-site-request.com"
+
+      conn =
+        conn
+        |> put_session(:registration_id, registration.id)
+        |> post(
+          "/oauth/register",
+          %{
+            "op" => "register",
+            "authorization" => %{
+              "scopes" => app.scopes,
+              "client_id" => app.client_id,
+              "redirect_uri" => unlisted_redirect_uri,
+              "state" => "a_state",
+              "nickname" => "availablenick",
+              "email" => "available@email.com"
+            }
+          }
+        )
+
+      assert html_response(conn, 401)
+    end
+
+    test "with invalid params, POST /oauth/register?op=register renders registration_details page",
+         %{
+           app: app,
+           conn: conn
+         } do
+      another_user = insert(:user)
+      registration = insert(:registration, user: nil, info: %{"nickname" => nil, "email" => nil})
+
+      params = %{
+        "op" => "register",
+        "authorization" => %{
+          "scopes" => app.scopes,
+          "client_id" => app.client_id,
+          "redirect_uri" => OAuthController.default_redirect_uri(app),
+          "state" => "a_state",
+          "nickname" => "availablenickname",
+          "email" => "available@email.com"
+        }
+      }
+
+      for {bad_param, bad_param_value} <-
+            [{"nickname", another_user.nickname}, {"email", another_user.email}] do
+        bad_registration_attrs = %{
+          "authorization" => Map.put(params["authorization"], bad_param, bad_param_value)
+        }
+
+        bad_params = Map.merge(params, bad_registration_attrs)
+
+        conn =
+          conn
+          |> put_session(:registration_id, registration.id)
+          |> post("/oauth/register", bad_params)
+
+        assert html_response(conn, 403) =~ ~r/name="op" type="submit" value="register"/
+        assert get_flash(conn, :error) == "Error: #{bad_param} has already been taken."
+      end
+    end
+
+    test "with valid params, POST /oauth/register?op=connect redirects to `redirect_uri` with `code`",
+         %{
+           app: app,
+           conn: conn
+         } do
+      user = insert(:user, password_hash: Pleroma.Password.Pbkdf2.hash_pwd_salt("testpassword"))
+      registration = insert(:registration, user: nil)
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      conn =
+        conn
+        |> put_session(:registration_id, registration.id)
+        |> post(
+          "/oauth/register",
+          %{
+            "op" => "connect",
+            "authorization" => %{
+              "scopes" => app.scopes,
+              "client_id" => app.client_id,
+              "redirect_uri" => redirect_uri,
+              "state" => "a_state",
+              "name" => user.nickname,
+              "password" => "testpassword"
+            }
+          }
+        )
+
+      assert html_response(conn, 302)
+      assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
+    end
+
+    test "with unlisted `redirect_uri`, POST /oauth/register?op=connect results in HTTP 401`",
+         %{
+           app: app,
+           conn: conn
+         } do
+      user = insert(:user, password_hash: Pleroma.Password.Pbkdf2.hash_pwd_salt("testpassword"))
+      registration = insert(:registration, user: nil)
+      unlisted_redirect_uri = "http://cross-site-request.com"
+
+      conn =
+        conn
+        |> put_session(:registration_id, registration.id)
+        |> post(
+          "/oauth/register",
+          %{
+            "op" => "connect",
+            "authorization" => %{
+              "scopes" => app.scopes,
+              "client_id" => app.client_id,
+              "redirect_uri" => unlisted_redirect_uri,
+              "state" => "a_state",
+              "name" => user.nickname,
+              "password" => "testpassword"
+            }
+          }
+        )
+
+      assert html_response(conn, 401)
+    end
+
+    test "with invalid params, POST /oauth/register?op=connect renders registration_details page",
+         %{
+           app: app,
+           conn: conn
+         } do
+      user = insert(:user)
+      registration = insert(:registration, user: nil)
+
+      params = %{
+        "op" => "connect",
+        "authorization" => %{
+          "scopes" => app.scopes,
+          "client_id" => app.client_id,
+          "redirect_uri" => OAuthController.default_redirect_uri(app),
+          "state" => "a_state",
+          "name" => user.nickname,
+          "password" => "wrong password"
+        }
+      }
+
+      conn =
+        conn
+        |> put_session(:registration_id, registration.id)
+        |> post("/oauth/register", params)
+
+      assert html_response(conn, 401) =~ ~r/name="op" type="submit" value="connect"/
+      assert get_flash(conn, :error) == "Invalid Username/Password"
+    end
+  end
+
+  describe "POST /oauth/authorize_callback" do
+    test "redirects with oauth authorization, " <>
+           "granting requested app-supported scopes to both admin- and non-admin users" do
+      app_scopes = ["read", "write", "admin", "secret_scope"]
+      app = insert(:oauth_app, scopes: app_scopes)
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      non_admin = insert(:user, is_admin: false)
+      admin = insert(:user, is_admin: true)
+      scopes_subset = ["read:subscope", "write", "admin"]
+
+      # In case scope param is missing, expecting _all_ app-supported scopes to be granted
+      for user <- [non_admin, admin],
+          {requested_scopes, expected_scopes} <-
+            %{scopes_subset => scopes_subset, nil: app_scopes} do
+        conn =
+          post(
+            build_conn(),
+            "/oauth/authorize_callback",
+            %{
+              "authorization" => %{
+                "name" => user.nickname,
+                "password" => "test",
+                "client_id" => app.client_id,
+                "redirect_uri" => redirect_uri,
+                "scope" => requested_scopes,
+                "state" => "statepassed"
+              }
+            }
+          )
+
+        target = redirected_to(conn)
+        assert target =~ redirect_uri
+
+        query = URI.parse(target).query |> URI.query_decoder() |> Map.new()
+
+        assert %{"state" => "statepassed", "code" => code} = query
+        auth = Repo.get_by(Authorization, token: code)
+        assert auth
+        assert auth.scopes == expected_scopes
+      end
+    end
+
+    test "authorize from cookie" do
+      user = insert(:user)
+      app = insert(:oauth_app)
+      oauth_token = insert(:oauth_token, user: user, app: app)
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      conn =
+        build_conn()
+        |> Plug.Session.call(Plug.Session.init(@session_opts))
+        |> fetch_session()
+        |> AuthHelper.put_session_token(oauth_token.token)
+        |> post(
+          "/oauth/authorize_callback",
+          %{
+            "authorization" => %{
+              "name" => user.nickname,
+              "client_id" => app.client_id,
+              "redirect_uri" => redirect_uri,
+              "scope" => app.scopes,
+              "state" => "statepassed"
+            }
+          }
+        )
+
+      target = redirected_to(conn)
+      assert target =~ redirect_uri
+
+      query = URI.parse(target).query |> URI.query_decoder() |> Map.new()
+
+      assert %{"state" => "statepassed", "code" => code} = query
+      auth = Repo.get_by(Authorization, token: code)
+      assert auth
+      assert auth.scopes == app.scopes
+    end
+
+    test "redirect to on two-factor auth page" do
+      otp_secret = TOTP.generate_secret()
+
+      user =
+        insert(:user,
+          multi_factor_authentication_settings: %MFA.Settings{
+            enabled: true,
+            totp: %MFA.Settings.TOTP{secret: otp_secret, confirmed: true}
+          }
+        )
+
+      app = insert(:oauth_app, scopes: ["read", "write", "follow"])
+
+      conn =
+        build_conn()
+        |> post("/oauth/authorize_callback", %{
+          "authorization" => %{
+            "name" => user.nickname,
+            "password" => "test",
+            "client_id" => app.client_id,
+            "redirect_uri" => app.redirect_uris,
+            "scope" => "read write",
+            "state" => "statepassed"
+          }
+        })
+
+      result = html_response(conn, 200)
+
+      mfa_token = Repo.get_by(MFA.Token, user_id: user.id)
+      assert result =~ app.redirect_uris
+      assert result =~ "statepassed"
+      assert result =~ mfa_token.token
+      assert result =~ "Two-factor authentication"
+    end
+
+    test "returns 401 for wrong credentials", %{conn: conn} do
+      user = insert(:user)
+      app = insert(:oauth_app)
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      result =
+        conn
+        |> post("/oauth/authorize_callback", %{
+          "authorization" => %{
+            "name" => user.nickname,
+            "password" => "wrong",
+            "client_id" => app.client_id,
+            "redirect_uri" => redirect_uri,
+            "state" => "statepassed",
+            "scope" => Enum.join(app.scopes, " ")
+          }
+        })
+        |> html_response(:unauthorized)
+
+      # Keep the details
+      assert result =~ app.client_id
+      assert result =~ redirect_uri
+
+      # Error message
+      assert result =~ "Invalid Username/Password"
+    end
+
+    test "returns 401 for missing scopes" do
+      user = insert(:user, is_admin: false)
+      app = insert(:oauth_app, scopes: ["read", "write", "admin"])
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      result =
+        build_conn()
+        |> post("/oauth/authorize_callback", %{
+          "authorization" => %{
+            "name" => user.nickname,
+            "password" => "test",
+            "client_id" => app.client_id,
+            "redirect_uri" => redirect_uri,
+            "state" => "statepassed",
+            "scope" => ""
+          }
+        })
+        |> html_response(:unauthorized)
+
+      # Keep the details
+      assert result =~ app.client_id
+      assert result =~ redirect_uri
+
+      # Error message
+      assert result =~ "This action is outside the authorized scopes"
+    end
+
+    test "returns 401 for scopes beyond app scopes hierarchy", %{conn: conn} do
+      user = insert(:user)
+      app = insert(:oauth_app, scopes: ["read", "write"])
+      redirect_uri = OAuthController.default_redirect_uri(app)
+
+      result =
+        conn
+        |> post("/oauth/authorize_callback", %{
+          "authorization" => %{
+            "name" => user.nickname,
+            "password" => "test",
+            "client_id" => app.client_id,
+            "redirect_uri" => redirect_uri,
+            "state" => "statepassed",
+            "scope" => "read write follow"
+          }
+        })
+        |> html_response(:unauthorized)
+
+      # Keep the details
+      assert result =~ app.client_id
+      assert result =~ redirect_uri
+
+      # Error message
+      assert result =~ "This action is outside the authorized scopes"
+    end
+  end
+end
diff --git a/test/pleroma/web/o_auth/o_auth_controller_test.exs b/test/pleroma/web/o_auth/o_auth_controller_test.exs
index c0f243a75..4e51edb63 100644
--- a/test/pleroma/web/o_auth/o_auth_controller_test.exs
+++ b/test/pleroma/web/o_auth/o_auth_controller_test.exs
@@ -59,708 +59,6 @@ defmodule Pleroma.Web.OAuth.OAuthControllerTest do
       assert response =~ "Sign in with Twitter"
       assert response =~ o_auth_path(conn, :prepare_request)
     end
-
-    test "GET /oauth/prepare_request encodes parameters as `state` and redirects", %{
-      app: app,
-      conn: conn
-    } do
-      conn =
-        get(
-          conn,
-          "/oauth/prepare_request",
-          %{
-            "provider" => "twitter",
-            "authorization" => %{
-              "scope" => "read follow",
-              "client_id" => app.client_id,
-              "redirect_uri" => OAuthController.default_redirect_uri(app),
-              "state" => "a_state"
-            }
-          }
-        )
-
-      assert html_response(conn, 302)
-
-      redirect_query = URI.parse(redirected_to(conn)).query
-      assert %{"state" => state_param} = URI.decode_query(redirect_query)
-      assert {:ok, state_components} = Jason.decode(state_param)
-
-      expected_client_id = app.client_id
-      expected_redirect_uri = app.redirect_uris
-
-      assert %{
-               "scope" => "read follow",
-               "client_id" => ^expected_client_id,
-               "redirect_uri" => ^expected_redirect_uri,
-               "state" => "a_state"
-             } = state_components
-    end
-
-    test "with user-bound registration, GET /oauth/<provider>/callback redirects to `redirect_uri` with `code`",
-         %{app: app, conn: conn} do
-      registration = insert(:registration)
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      state_params = %{
-        "scope" => Enum.join(app.scopes, " "),
-        "client_id" => app.client_id,
-        "redirect_uri" => redirect_uri,
-        "state" => ""
-      }
-
-      conn =
-        conn
-        |> assign(:ueberauth_auth, %{provider: registration.provider, uid: registration.uid})
-        |> get(
-          "/oauth/twitter/callback",
-          %{
-            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
-            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
-            "provider" => "twitter",
-            "state" => Jason.encode!(state_params)
-          }
-        )
-
-      assert html_response(conn, 302)
-      assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
-    end
-
-    test "with user-unbound registration, GET /oauth/<provider>/callback renders registration_details page",
-         %{app: app, conn: conn} do
-      user = insert(:user)
-
-      state_params = %{
-        "scope" => "read write",
-        "client_id" => app.client_id,
-        "redirect_uri" => OAuthController.default_redirect_uri(app),
-        "state" => "a_state"
-      }
-
-      conn =
-        conn
-        |> assign(:ueberauth_auth, %{
-          provider: "twitter",
-          uid: "171799000",
-          info: %{nickname: user.nickname, email: user.email, name: user.name, description: nil}
-        })
-        |> get(
-          "/oauth/twitter/callback",
-          %{
-            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
-            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
-            "provider" => "twitter",
-            "state" => Jason.encode!(state_params)
-          }
-        )
-
-      assert response = html_response(conn, 200)
-      assert response =~ ~r/name="op" type="submit" value="register"/
-      assert response =~ ~r/name="op" type="submit" value="connect"/
-      assert response =~ user.email
-      assert response =~ user.nickname
-    end
-
-    test "on authentication error, GET /oauth/<provider>/callback redirects to `redirect_uri`", %{
-      app: app,
-      conn: conn
-    } do
-      state_params = %{
-        "scope" => Enum.join(app.scopes, " "),
-        "client_id" => app.client_id,
-        "redirect_uri" => OAuthController.default_redirect_uri(app),
-        "state" => ""
-      }
-
-      conn =
-        conn
-        |> assign(:ueberauth_failure, %{errors: [%{message: "(error description)"}]})
-        |> get(
-          "/oauth/twitter/callback",
-          %{
-            "oauth_token" => "G-5a3AAAAAAAwMH9AAABaektfSM",
-            "oauth_verifier" => "QZl8vUqNvXMTKpdmUnGejJxuHG75WWWs",
-            "provider" => "twitter",
-            "state" => Jason.encode!(state_params)
-          }
-        )
-
-      assert html_response(conn, 302)
-      assert redirected_to(conn) == app.redirect_uris
-      assert get_flash(conn, :error) == "Failed to authenticate: (error description)."
-    end
-
-    test "GET /oauth/registration_details renders registration details form", %{
-      app: app,
-      conn: conn
-    } do
-      conn =
-        get(
-          conn,
-          "/oauth/registration_details",
-          %{
-            "authorization" => %{
-              "scopes" => app.scopes,
-              "client_id" => app.client_id,
-              "redirect_uri" => OAuthController.default_redirect_uri(app),
-              "state" => "a_state",
-              "nickname" => nil,
-              "email" => "john@doe.com"
-            }
-          }
-        )
-
-      assert response = html_response(conn, 200)
-      assert response =~ ~r/name="op" type="submit" value="register"/
-      assert response =~ ~r/name="op" type="submit" value="connect"/
-    end
-
-    test "with valid params, POST /oauth/register?op=register redirects to `redirect_uri` with `code`",
-         %{
-           app: app,
-           conn: conn
-         } do
-      registration = insert(:registration, user: nil, info: %{"nickname" => nil, "email" => nil})
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      conn =
-        conn
-        |> put_session(:registration_id, registration.id)
-        |> post(
-          "/oauth/register",
-          %{
-            "op" => "register",
-            "authorization" => %{
-              "scopes" => app.scopes,
-              "client_id" => app.client_id,
-              "redirect_uri" => redirect_uri,
-              "state" => "a_state",
-              "nickname" => "availablenick",
-              "email" => "available@email.com"
-            }
-          }
-        )
-
-      assert html_response(conn, 302)
-      assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
-    end
-
-    test "with unlisted `redirect_uri`, POST /oauth/register?op=register results in HTTP 401",
-         %{
-           app: app,
-           conn: conn
-         } do
-      registration = insert(:registration, user: nil, info: %{"nickname" => nil, "email" => nil})
-      unlisted_redirect_uri = "http://cross-site-request.com"
-
-      conn =
-        conn
-        |> put_session(:registration_id, registration.id)
-        |> post(
-          "/oauth/register",
-          %{
-            "op" => "register",
-            "authorization" => %{
-              "scopes" => app.scopes,
-              "client_id" => app.client_id,
-              "redirect_uri" => unlisted_redirect_uri,
-              "state" => "a_state",
-              "nickname" => "availablenick",
-              "email" => "available@email.com"
-            }
-          }
-        )
-
-      assert html_response(conn, 401)
-    end
-
-    test "with invalid params, POST /oauth/register?op=register renders registration_details page",
-         %{
-           app: app,
-           conn: conn
-         } do
-      another_user = insert(:user)
-      registration = insert(:registration, user: nil, info: %{"nickname" => nil, "email" => nil})
-
-      params = %{
-        "op" => "register",
-        "authorization" => %{
-          "scopes" => app.scopes,
-          "client_id" => app.client_id,
-          "redirect_uri" => OAuthController.default_redirect_uri(app),
-          "state" => "a_state",
-          "nickname" => "availablenickname",
-          "email" => "available@email.com"
-        }
-      }
-
-      for {bad_param, bad_param_value} <-
-            [{"nickname", another_user.nickname}, {"email", another_user.email}] do
-        bad_registration_attrs = %{
-          "authorization" => Map.put(params["authorization"], bad_param, bad_param_value)
-        }
-
-        bad_params = Map.merge(params, bad_registration_attrs)
-
-        conn =
-          conn
-          |> put_session(:registration_id, registration.id)
-          |> post("/oauth/register", bad_params)
-
-        assert html_response(conn, 403) =~ ~r/name="op" type="submit" value="register"/
-        assert get_flash(conn, :error) == "Error: #{bad_param} has already been taken."
-      end
-    end
-
-    test "with valid params, POST /oauth/register?op=connect redirects to `redirect_uri` with `code`",
-         %{
-           app: app,
-           conn: conn
-         } do
-      user = insert(:user, password_hash: Pleroma.Password.Pbkdf2.hash_pwd_salt("testpassword"))
-      registration = insert(:registration, user: nil)
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      conn =
-        conn
-        |> put_session(:registration_id, registration.id)
-        |> post(
-          "/oauth/register",
-          %{
-            "op" => "connect",
-            "authorization" => %{
-              "scopes" => app.scopes,
-              "client_id" => app.client_id,
-              "redirect_uri" => redirect_uri,
-              "state" => "a_state",
-              "name" => user.nickname,
-              "password" => "testpassword"
-            }
-          }
-        )
-
-      assert html_response(conn, 302)
-      assert redirected_to(conn) =~ ~r/#{redirect_uri}\?code=.+/
-    end
-
-    test "with unlisted `redirect_uri`, POST /oauth/register?op=connect results in HTTP 401`",
-         %{
-           app: app,
-           conn: conn
-         } do
-      user = insert(:user, password_hash: Pleroma.Password.Pbkdf2.hash_pwd_salt("testpassword"))
-      registration = insert(:registration, user: nil)
-      unlisted_redirect_uri = "http://cross-site-request.com"
-
-      conn =
-        conn
-        |> put_session(:registration_id, registration.id)
-        |> post(
-          "/oauth/register",
-          %{
-            "op" => "connect",
-            "authorization" => %{
-              "scopes" => app.scopes,
-              "client_id" => app.client_id,
-              "redirect_uri" => unlisted_redirect_uri,
-              "state" => "a_state",
-              "name" => user.nickname,
-              "password" => "testpassword"
-            }
-          }
-        )
-
-      assert html_response(conn, 401)
-    end
-
-    test "with invalid params, POST /oauth/register?op=connect renders registration_details page",
-         %{
-           app: app,
-           conn: conn
-         } do
-      user = insert(:user)
-      registration = insert(:registration, user: nil)
-
-      params = %{
-        "op" => "connect",
-        "authorization" => %{
-          "scopes" => app.scopes,
-          "client_id" => app.client_id,
-          "redirect_uri" => OAuthController.default_redirect_uri(app),
-          "state" => "a_state",
-          "name" => user.nickname,
-          "password" => "wrong password"
-        }
-      }
-
-      conn =
-        conn
-        |> put_session(:registration_id, registration.id)
-        |> post("/oauth/register", params)
-
-      assert html_response(conn, 401) =~ ~r/name="op" type="submit" value="connect"/
-      assert get_flash(conn, :error) == "Invalid Username/Password"
-    end
-  end
-
-  describe "GET /oauth/authorize" do
-    setup do
-      [
-        app: insert(:oauth_app, redirect_uris: "https://redirect.url"),
-        conn:
-          build_conn()
-          |> Plug.Session.call(Plug.Session.init(@session_opts))
-          |> fetch_session()
-      ]
-    end
-
-    test "renders authentication page", %{app: app, conn: conn} do
-      conn =
-        get(
-          conn,
-          "/oauth/authorize",
-          %{
-            "response_type" => "code",
-            "client_id" => app.client_id,
-            "redirect_uri" => OAuthController.default_redirect_uri(app),
-            "scope" => "read"
-          }
-        )
-
-      assert html_response(conn, 200) =~ ~s(type="submit")
-    end
-
-    test "properly handles internal calls with `authorization`-wrapped params", %{
-      app: app,
-      conn: conn
-    } do
-      conn =
-        get(
-          conn,
-          "/oauth/authorize",
-          %{
-            "authorization" => %{
-              "response_type" => "code",
-              "client_id" => app.client_id,
-              "redirect_uri" => OAuthController.default_redirect_uri(app),
-              "scope" => "read"
-            }
-          }
-        )
-
-      assert html_response(conn, 200) =~ ~s(type="submit")
-    end
-
-    test "renders authentication page if user is already authenticated but `force_login` is tru-ish",
-         %{app: app, conn: conn} do
-      token = insert(:oauth_token, app: app)
-
-      conn =
-        conn
-        |> AuthHelper.put_session_token(token.token)
-        |> get(
-          "/oauth/authorize",
-          %{
-            "response_type" => "code",
-            "client_id" => app.client_id,
-            "redirect_uri" => OAuthController.default_redirect_uri(app),
-            "scope" => "read",
-            "force_login" => "true"
-          }
-        )
-
-      assert html_response(conn, 200) =~ ~s(type="submit")
-    end
-
-    test "renders authentication page if user is already authenticated but user request with another client",
-         %{
-           app: app,
-           conn: conn
-         } do
-      token = insert(:oauth_token, app: app)
-
-      conn =
-        conn
-        |> AuthHelper.put_session_token(token.token)
-        |> get(
-          "/oauth/authorize",
-          %{
-            "response_type" => "code",
-            "client_id" => "another_client_id",
-            "redirect_uri" => OAuthController.default_redirect_uri(app),
-            "scope" => "read"
-          }
-        )
-
-      assert html_response(conn, 200) =~ ~s(type="submit")
-    end
-
-    test "with existing authentication and non-OOB `redirect_uri`, redirects to app with `token` and `state` params",
-         %{
-           app: app,
-           conn: conn
-         } do
-      token = insert(:oauth_token, app: app)
-
-      conn =
-        conn
-        |> AuthHelper.put_session_token(token.token)
-        |> get(
-          "/oauth/authorize",
-          %{
-            "response_type" => "code",
-            "client_id" => app.client_id,
-            "redirect_uri" => OAuthController.default_redirect_uri(app),
-            "state" => "specific_client_state",
-            "scope" => "read"
-          }
-        )
-
-      assert URI.decode(redirected_to(conn)) ==
-               "https://redirect.url?access_token=#{token.token}&state=specific_client_state"
-    end
-
-    test "with existing authentication and unlisted non-OOB `redirect_uri`, redirects without credentials",
-         %{
-           app: app,
-           conn: conn
-         } do
-      unlisted_redirect_uri = "http://cross-site-request.com"
-      token = insert(:oauth_token, app: app)
-
-      conn =
-        conn
-        |> AuthHelper.put_session_token(token.token)
-        |> get(
-          "/oauth/authorize",
-          %{
-            "response_type" => "code",
-            "client_id" => app.client_id,
-            "redirect_uri" => unlisted_redirect_uri,
-            "state" => "specific_client_state",
-            "scope" => "read"
-          }
-        )
-
-      assert redirected_to(conn) == unlisted_redirect_uri
-    end
-
-    test "with existing authentication and OOB `redirect_uri`, redirects to app with `token` and `state` params",
-         %{
-           app: app,
-           conn: conn
-         } do
-      token = insert(:oauth_token, app: app)
-
-      conn =
-        conn
-        |> AuthHelper.put_session_token(token.token)
-        |> get(
-          "/oauth/authorize",
-          %{
-            "response_type" => "code",
-            "client_id" => app.client_id,
-            "redirect_uri" => "urn:ietf:wg:oauth:2.0:oob",
-            "scope" => "read"
-          }
-        )
-
-      assert html_response(conn, 200) =~ "Authorization exists"
-    end
-  end
-
-  describe "POST /oauth/authorize" do
-    test "redirects with oauth authorization, " <>
-           "granting requested app-supported scopes to both admin- and non-admin users" do
-      app_scopes = ["read", "write", "admin", "secret_scope"]
-      app = insert(:oauth_app, scopes: app_scopes)
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      non_admin = insert(:user, is_admin: false)
-      admin = insert(:user, is_admin: true)
-      scopes_subset = ["read:subscope", "write", "admin"]
-
-      # In case scope param is missing, expecting _all_ app-supported scopes to be granted
-      for user <- [non_admin, admin],
-          {requested_scopes, expected_scopes} <-
-            %{scopes_subset => scopes_subset, nil: app_scopes} do
-        conn =
-          post(
-            build_conn(),
-            "/oauth/authorize",
-            %{
-              "authorization" => %{
-                "name" => user.nickname,
-                "password" => "test",
-                "client_id" => app.client_id,
-                "redirect_uri" => redirect_uri,
-                "scope" => requested_scopes,
-                "state" => "statepassed"
-              }
-            }
-          )
-
-        target = redirected_to(conn)
-        assert target =~ redirect_uri
-
-        query = URI.parse(target).query |> URI.query_decoder() |> Map.new()
-
-        assert %{"state" => "statepassed", "code" => code} = query
-        auth = Repo.get_by(Authorization, token: code)
-        assert auth
-        assert auth.scopes == expected_scopes
-      end
-    end
-
-    test "authorize from cookie" do
-      user = insert(:user)
-      app = insert(:oauth_app)
-      oauth_token = insert(:oauth_token, user: user, app: app)
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      conn =
-        build_conn()
-        |> Plug.Session.call(Plug.Session.init(@session_opts))
-        |> fetch_session()
-        |> AuthHelper.put_session_token(oauth_token.token)
-        |> post(
-          "/oauth/authorize",
-          %{
-            "authorization" => %{
-              "name" => user.nickname,
-              "client_id" => app.client_id,
-              "redirect_uri" => redirect_uri,
-              "scope" => app.scopes,
-              "state" => "statepassed"
-            }
-          }
-        )
-
-      target = redirected_to(conn)
-      assert target =~ redirect_uri
-
-      query = URI.parse(target).query |> URI.query_decoder() |> Map.new()
-
-      assert %{"state" => "statepassed", "code" => code} = query
-      auth = Repo.get_by(Authorization, token: code)
-      assert auth
-      assert auth.scopes == app.scopes
-    end
-
-    test "redirect to on two-factor auth page" do
-      otp_secret = TOTP.generate_secret()
-
-      user =
-        insert(:user,
-          multi_factor_authentication_settings: %MFA.Settings{
-            enabled: true,
-            totp: %MFA.Settings.TOTP{secret: otp_secret, confirmed: true}
-          }
-        )
-
-      app = insert(:oauth_app, scopes: ["read", "write", "follow"])
-
-      conn =
-        build_conn()
-        |> post("/oauth/authorize", %{
-          "authorization" => %{
-            "name" => user.nickname,
-            "password" => "test",
-            "client_id" => app.client_id,
-            "redirect_uri" => app.redirect_uris,
-            "scope" => "read write",
-            "state" => "statepassed"
-          }
-        })
-
-      result = html_response(conn, 200)
-
-      mfa_token = Repo.get_by(MFA.Token, user_id: user.id)
-      assert result =~ app.redirect_uris
-      assert result =~ "statepassed"
-      assert result =~ mfa_token.token
-      assert result =~ "Two-factor authentication"
-    end
-
-    test "returns 401 for wrong credentials", %{conn: conn} do
-      user = insert(:user)
-      app = insert(:oauth_app)
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      result =
-        conn
-        |> post("/oauth/authorize", %{
-          "authorization" => %{
-            "name" => user.nickname,
-            "password" => "wrong",
-            "client_id" => app.client_id,
-            "redirect_uri" => redirect_uri,
-            "state" => "statepassed",
-            "scope" => Enum.join(app.scopes, " ")
-          }
-        })
-        |> html_response(:unauthorized)
-
-      # Keep the details
-      assert result =~ app.client_id
-      assert result =~ redirect_uri
-
-      # Error message
-      assert result =~ "Invalid Username/Password"
-    end
-
-    test "returns 401 for missing scopes" do
-      user = insert(:user, is_admin: false)
-      app = insert(:oauth_app, scopes: ["read", "write", "admin"])
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      result =
-        build_conn()
-        |> post("/oauth/authorize", %{
-          "authorization" => %{
-            "name" => user.nickname,
-            "password" => "test",
-            "client_id" => app.client_id,
-            "redirect_uri" => redirect_uri,
-            "state" => "statepassed",
-            "scope" => ""
-          }
-        })
-        |> html_response(:unauthorized)
-
-      # Keep the details
-      assert result =~ app.client_id
-      assert result =~ redirect_uri
-
-      # Error message
-      assert result =~ "This action is outside the authorized scopes"
-    end
-
-    test "returns 401 for scopes beyond app scopes hierarchy", %{conn: conn} do
-      user = insert(:user)
-      app = insert(:oauth_app, scopes: ["read", "write"])
-      redirect_uri = OAuthController.default_redirect_uri(app)
-
-      result =
-        conn
-        |> post("/oauth/authorize", %{
-          "authorization" => %{
-            "name" => user.nickname,
-            "password" => "test",
-            "client_id" => app.client_id,
-            "redirect_uri" => redirect_uri,
-            "state" => "statepassed",
-            "scope" => "read write follow"
-          }
-        })
-        |> html_response(:unauthorized)
-
-      # Keep the details
-      assert result =~ app.client_id
-      assert result =~ redirect_uri
-
-      # Error message
-      assert result =~ "This action is outside the authorized scopes"
-    end
   end
 
   describe "POST /oauth/token" do
@@ -1136,12 +434,16 @@ defmodule Pleroma.Web.OAuth.OAuthControllerTest do
 
       response =
         build_conn()
-        |> post("/oauth/token", %{
-          "grant_type" => "refresh_token",
-          "refresh_token" => token.refresh_token,
-          "client_id" => app.client_id,
-          "client_secret" => app.client_secret
-        })
+        |> post(
+          "/oauth/token?#{
+            URI.encode_query(%{
+              "grant_type" => "refresh_token",
+              "refresh_token" => token.refresh_token,
+              "client_id" => app.client_id,
+              "client_secret" => app.client_secret
+            })
+          }"
+        )
         |> json_response_and_validate_schema(200)
 
       ap_id = user.ap_id
@@ -1174,12 +476,16 @@ defmodule Pleroma.Web.OAuth.OAuthControllerTest do
 
       response =
         build_conn()
-        |> post("/oauth/token", %{
-          "grant_type" => "refresh_token",
-          "refresh_token" => token.token,
-          "client_id" => app.client_id,
-          "client_secret" => app.client_secret
-        })
+        |> post(
+          "/oauth/token?#{
+            URI.encode_query(%{
+              "grant_type" => "refresh_token",
+              "refresh_token" => token.token,
+              "client_id" => app.client_id,
+              "client_secret" => app.client_secret
+            })
+          }"
+        )
         |> json_response_and_validate_schema(400)
 
       assert %{"error" => "Invalid credentials"} == response
@@ -1190,12 +496,16 @@ defmodule Pleroma.Web.OAuth.OAuthControllerTest do
 
       response =
         build_conn()
-        |> post("/oauth/token", %{
-          "grant_type" => "refresh_token",
-          "refresh_token" => "token.refresh_token",
-          "client_id" => app.client_id,
-          "client_secret" => app.client_secret
-        })
+        |> post(
+          "/oauth/token?#{
+            URI.encode_query(%{
+              "grant_type" => "refresh_token",
+              "refresh_token" => "token.refresh_token",
+              "client_id" => app.client_id,
+              "client_secret" => app.client_secret
+            })
+          }"
+        )
         |> json_response_and_validate_schema(400)
 
       assert %{"error" => "Invalid credentials"} == response
@@ -1218,12 +528,16 @@ defmodule Pleroma.Web.OAuth.OAuthControllerTest do
 
       response =
         build_conn()
-        |> post("/oauth/token", %{
-          "grant_type" => "refresh_token",
-          "refresh_token" => access_token.refresh_token,
-          "client_id" => app.client_id,
-          "client_secret" => app.client_secret
-        })
+        |> post(
+          "/oauth/token?#{
+            URI.encode_query(%{
+              "grant_type" => "refresh_token",
+              "refresh_token" => access_token.refresh_token,
+              "client_id" => app.client_id,
+              "client_secret" => app.client_secret
+            })
+          }"
+        )
         |> json_response_and_validate_schema(200)
 
       ap_id = user.ap_id
@@ -1304,4 +618,170 @@ defmodule Pleroma.Web.OAuth.OAuthControllerTest do
       assert %{"error" => "Bad request"} == response
     end
   end
+
+  describe "GET /oauth/authorize" do
+    setup do
+      [
+        app: insert(:oauth_app, redirect_uris: "https://redirect.url"),
+        conn:
+          build_conn()
+          |> Plug.Session.call(Plug.Session.init(@session_opts))
+          |> fetch_session()
+      ]
+    end
+
+    test "renders authentication page", %{app: app, conn: conn} do
+      conn =
+        get(
+          conn,
+          "/oauth/authorize",
+          %{
+            "response_type" => "code",
+            "client_id" => app.client_id,
+            "redirect_uri" => OAuthController.default_redirect_uri(app),
+            "scope" => "read"
+          }
+        )
+
+      assert html_response(conn, 200) =~ ~s(type="submit")
+    end
+
+    test "properly handles internal calls with `authorization`-wrapped params", %{
+      app: app,
+      conn: conn
+    } do
+      conn =
+        get(
+          conn,
+          "/oauth/authorize",
+          %{
+            "authorization" => %{
+              "response_type" => "code",
+              "client_id" => app.client_id,
+              "redirect_uri" => OAuthController.default_redirect_uri(app),
+              "scope" => "read"
+            }
+          }
+        )
+
+      assert html_response(conn, 200) =~ ~s(type="submit")
+    end
+
+    test "renders authentication page if user is already authenticated but `force_login` is tru-ish",
+         %{app: app, conn: conn} do
+      token = insert(:oauth_token, app: app)
+
+      conn =
+        conn
+        |> AuthHelper.put_session_token(token.token)
+        |> get(
+          "/oauth/authorize",
+          %{
+            "response_type" => "code",
+            "client_id" => app.client_id,
+            "redirect_uri" => OAuthController.default_redirect_uri(app),
+            "scope" => "read",
+            "force_login" => "true"
+          }
+        )
+
+      assert html_response(conn, 200) =~ ~s(type="submit")
+    end
+
+    test "renders authentication page if user is already authenticated but user request with another client",
+         %{
+           app: app,
+           conn: conn
+         } do
+      token = insert(:oauth_token, app: app)
+
+      conn =
+        conn
+        |> AuthHelper.put_session_token(token.token)
+        |> get(
+          "/oauth/authorize",
+          %{
+            "response_type" => "code",
+            "client_id" => "another_client_id",
+            "redirect_uri" => OAuthController.default_redirect_uri(app),
+            "scope" => "read"
+          }
+        )
+
+      assert html_response(conn, 200) =~ ~s(type="submit")
+    end
+
+    test "with existing authentication and non-OOB `redirect_uri`, redirects to app with `token` and `state` params",
+         %{
+           app: app,
+           conn: conn
+         } do
+      token = insert(:oauth_token, app: app)
+
+      conn =
+        conn
+        |> AuthHelper.put_session_token(token.token)
+        |> get(
+          "/oauth/authorize",
+          %{
+            "response_type" => "code",
+            "client_id" => app.client_id,
+            "redirect_uri" => OAuthController.default_redirect_uri(app),
+            "state" => "specific_client_state",
+            "scope" => "read"
+          }
+        )
+
+      assert URI.decode(redirected_to(conn)) ==
+               "https://redirect.url?access_token=#{token.token}&state=specific_client_state"
+    end
+
+    test "with existing authentication and unlisted non-OOB `redirect_uri`, redirects without credentials",
+         %{
+           app: app,
+           conn: conn
+         } do
+      unlisted_redirect_uri = "http://cross-site-request.com"
+      token = insert(:oauth_token, app: app)
+
+      conn =
+        conn
+        |> AuthHelper.put_session_token(token.token)
+        |> get(
+          "/oauth/authorize",
+          %{
+            "response_type" => "code",
+            "client_id" => app.client_id,
+            "redirect_uri" => unlisted_redirect_uri,
+            "state" => "specific_client_state",
+            "scope" => "read"
+          }
+        )
+
+      assert redirected_to(conn) == unlisted_redirect_uri
+    end
+
+    test "with existing authentication and OOB `redirect_uri`, redirects to app with `token` and `state` params",
+         %{
+           app: app,
+           conn: conn
+         } do
+      token = insert(:oauth_token, app: app)
+
+      conn =
+        conn
+        |> AuthHelper.put_session_token(token.token)
+        |> get(
+          "/oauth/authorize",
+          %{
+            "response_type" => "code",
+            "client_id" => app.client_id,
+            "redirect_uri" => "urn:ietf:wg:oauth:2.0:oob",
+            "scope" => "read"
+          }
+        )
+
+      assert html_response(conn, 200) =~ "Authorization exists"
+    end
+  end
 end