initial commit

tests/integration/user_username_case_update_test.go

@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package integration
+
+import (
+	"net/http"
+	"strings"
+	"testing"
+)
+
+func TestUserUsernameCaseUpdate(t *testing.T) {
+	runCaseUpdateTest(t, "re-sending_existing_username_keeps_discriminator", func(t *testing.T, client *testClient, account testAccount, initialUser userPartial) {
+		resp, err := client.patchJSONWithAuth("/users/@me", map[string]any{
+			"username": initialUser.Username,
+			"password": account.Password,
+		}, account.Token)
+		if err != nil {
+			t.Fatalf("failed to submit no-op username update: %v", err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var updatedUser userPrivateResponse
+		decodeJSONResponse(t, resp, &updatedUser)
+
+		if updatedUser.Username != initialUser.Username {
+			t.Fatalf("expected username to remain %q, got %q", initialUser.Username, updatedUser.Username)
+		}
+
+		if updatedUser.Discriminator != initialUser.Discriminator {
+			t.Fatalf("expected discriminator to remain %s, got %s", initialUser.Discriminator, updatedUser.Discriminator)
+		}
+	})
+
+	runCaseUpdateTest(t, "changing_username_case_preserves_discriminator", func(t *testing.T, client *testClient, account testAccount, initialUser userPartial) {
+		newUsername := strings.ToUpper(initialUser.Username)
+		if newUsername == initialUser.Username {
+			newUsername = strings.ToLower(initialUser.Username)
+		}
+
+		resp, err := client.patchJSONWithAuth("/users/@me", map[string]any{
+			"username": newUsername,
+			"password": account.Password,
+		}, account.Token)
+		if err != nil {
+			t.Fatalf("failed to update username: %v", err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var updatedUser userPrivateResponse
+		decodeJSONResponse(t, resp, &updatedUser)
+
+		if updatedUser.Username != newUsername {
+			t.Fatalf("expected username to be %q, got %q", newUsername, updatedUser.Username)
+		}
+
+		if updatedUser.Discriminator != initialUser.Discriminator {
+			t.Fatalf("expected discriminator to remain %s, got %s", initialUser.Discriminator, updatedUser.Discriminator)
+		}
+	})
+
+	runCaseUpdateTest(t, "changing_username_completely_works", func(t *testing.T, client *testClient, account testAccount, initialUser userPartial) {
+		newUsername := "diff" + initialUser.Username[:min(len(initialUser.Username), 28)]
+
+		resp, err := client.patchJSONWithAuth("/users/@me", map[string]any{
+			"username": newUsername,
+			"password": account.Password,
+		}, account.Token)
+		if err != nil {
+			t.Fatalf("failed to update username: %v", err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var updatedUser userPrivateResponse
+		decodeJSONResponse(t, resp, &updatedUser)
+
+		if updatedUser.Username != newUsername {
+			t.Fatalf("expected username to be %q, got %q", newUsername, updatedUser.Username)
+		}
+	})
+
+	runCaseUpdateTest(t, "no-op_username_and_discriminator_stays_unchanged", func(t *testing.T, client *testClient, account testAccount, initialUser userPartial) {
+		resp, err := client.patchJSONWithAuth("/users/@me", map[string]any{
+			"username":      initialUser.Username,
+			"discriminator": initialUser.Discriminator,
+			"password":      account.Password,
+		}, account.Token)
+		if err != nil {
+			t.Fatalf("failed to submit no-op update: %v", err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var updatedUser userPrivateResponse
+		decodeJSONResponse(t, resp, &updatedUser)
+
+		if updatedUser.Username != initialUser.Username {
+			t.Fatalf("expected username to remain %q, got %q", initialUser.Username, updatedUser.Username)
+		}
+		if updatedUser.Discriminator != initialUser.Discriminator {
+			t.Fatalf("expected discriminator to remain %s, got %s", initialUser.Discriminator, updatedUser.Discriminator)
+		}
+	})
+
+	runCaseUpdateTest(t, "case-only_change_with_explicit_discriminator_keeps_discriminator", func(t *testing.T, client *testClient, account testAccount, initialUser userPartial) {
+		newUsername := strings.ToLower(initialUser.Username)
+		if newUsername == initialUser.Username {
+			newUsername = strings.ToUpper(initialUser.Username)
+		}
+
+		resp, err := client.patchJSONWithAuth("/users/@me", map[string]any{
+			"username":      newUsername,
+			"discriminator": initialUser.Discriminator,
+			"password":      account.Password,
+		}, account.Token)
+		if err != nil {
+			t.Fatalf("failed to update username: %v", err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var updatedUser userPrivateResponse
+		decodeJSONResponse(t, resp, &updatedUser)
+
+		if updatedUser.Username != newUsername {
+			t.Fatalf("expected username to be %q, got %q", newUsername, updatedUser.Username)
+		}
+		if updatedUser.Discriminator != initialUser.Discriminator {
+			t.Fatalf("expected discriminator to remain %s, got %s", initialUser.Discriminator, updatedUser.Discriminator)
+		}
+	})
+
+	runCaseUpdateTest(t, "non-premium_username_change_rerolls_even_if_same_discriminator_sent", func(t *testing.T, client *testClient, account testAccount, initialUser userPartial) {
+		newUsername := "reroll" + initialUser.Username[:min(len(initialUser.Username), 26)]
+
+		resp, err := client.patchJSONWithAuth("/users/@me", map[string]any{
+			"username":      newUsername,
+			"discriminator": initialUser.Discriminator,
+			"password":      account.Password,
+		}, account.Token)
+		if err != nil {
+			t.Fatalf("failed to update username: %v", err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var updatedUser userPrivateResponse
+		decodeJSONResponse(t, resp, &updatedUser)
+
+		if updatedUser.Username != newUsername {
+			t.Fatalf("expected username to be %q, got %q", newUsername, updatedUser.Username)
+		}
+		if updatedUser.Discriminator == initialUser.Discriminator {
+			t.Fatalf("expected discriminator to change when username changed for non-premium; still %s", updatedUser.Discriminator)
+		}
+	})
+}
+
+func runCaseUpdateTest(t *testing.T, name string, test func(t *testing.T, client *testClient, account testAccount, initialUser userPartial)) {
+	t.Helper()
+	t.Run(name, func(t *testing.T) {
+		client := newTestClient(t)
+		account := createTestAccount(t, client)
+
+		resp, err := client.getWithAuth("/users/@me", account.Token)
+		if err != nil {
+			t.Fatalf("failed to fetch user: %v", err)
+		}
+		assertStatus(t, resp, http.StatusOK)
+
+		var initialUser userPartial
+		decodeJSONResponse(t, resp, &initialUser)
+
+		test(t, client, account, initialUser)
+	})
+}