initial commit

tests/integration/auth_case_insensitive_email_test.go

@@ -0,0 +1,154 @@
+/*
+ * 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 (
+	"fmt"
+	"net/http"
+	"strings"
+	"testing"
+	"time"
+
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
+)
+
+func TestAuthCaseInsensitiveEmail(t *testing.T) {
+	client := newTestClient(t)
+
+	t.Run("login with different case variations succeeds", func(t *testing.T) {
+		baseEmail := fmt.Sprintf("integration-test-%d@example.com", time.Now().UnixNano())
+		password := uniquePassword()
+		titleCaser := cases.Title(language.Und)
+
+		registerTestUser(t, client, baseEmail, password)
+
+		testCases := []struct {
+			name  string
+			email string
+		}{
+			{"lowercase", strings.ToLower(baseEmail)},
+			{"uppercase", strings.ToUpper(baseEmail)},
+			{"mixed case", mixedCase(baseEmail)},
+			{"title case", titleCaser.String(strings.ToLower(baseEmail))},
+		}
+
+		for _, tc := range testCases {
+			t.Run(tc.name, func(t *testing.T) {
+				loginReq := loginRequest{
+					Email:    tc.email,
+					Password: password,
+				}
+
+				resp, err := client.postJSON("/auth/login", loginReq)
+				if err != nil {
+					t.Fatalf("failed to call login endpoint: %v", err)
+				}
+				defer resp.Body.Close()
+
+				if resp.StatusCode != http.StatusOK {
+					t.Fatalf("expected login to succeed with %s email %q, got %d: %s", tc.name, tc.email, resp.StatusCode, readResponseBody(resp))
+				}
+
+				var loginResp loginResponse
+				decodeJSONResponse(t, resp, &loginResp)
+
+				if loginResp.Token == "" {
+					t.Fatalf("expected token in login response")
+				}
+			})
+		}
+	})
+
+	t.Run("registration with different case is treated as duplicate", func(t *testing.T) {
+		baseEmail := fmt.Sprintf("integration-test-%d@example.com", time.Now().UnixNano())
+		password := uniquePassword()
+
+		registerTestUser(t, client, baseEmail, password)
+
+		uppercaseEmail := strings.ToUpper(baseEmail)
+		req := registerRequest{
+			Email:       uppercaseEmail,
+			Username:    fmt.Sprintf("itest%x", time.Now().UnixNano()),
+			GlobalName:  "Test User",
+			Password:    uniquePassword(),
+			DateOfBirth: adultDateOfBirth(),
+			Consent:     true,
+		}
+
+		resp, err := client.postJSON("/auth/register", req)
+		if err != nil {
+			t.Fatalf("failed to call register endpoint: %v", err)
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode == http.StatusOK {
+			t.Fatalf("expected registration to fail for duplicate email (different case), got 200 OK")
+		}
+
+		if resp.StatusCode != http.StatusBadRequest && resp.StatusCode != http.StatusConflict {
+			t.Fatalf("expected 400 or 409 for duplicate email, got %d: %s", resp.StatusCode, readResponseBody(resp))
+		}
+	})
+
+	t.Run("forgot password with different case works", func(t *testing.T) {
+		baseEmail := fmt.Sprintf("integration-test-%d@example.com", time.Now().UnixNano())
+		password := uniquePassword()
+
+		registerTestUser(t, client, baseEmail, password)
+
+		uppercaseEmail := strings.ToUpper(baseEmail)
+		payload := map[string]string{
+			"email": uppercaseEmail,
+		}
+
+		resp, err := client.postJSON("/auth/forgot", payload)
+		if err != nil {
+			t.Fatalf("failed to call forgot endpoint: %v", err)
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusAccepted {
+			t.Fatalf("expected forgot to succeed with uppercase email, got %d: %s", resp.StatusCode, readResponseBody(resp))
+		}
+	})
+
+	t.Run("email stored is normalized to lowercase", func(t *testing.T) {
+		mixedEmail := fmt.Sprintf("Integration-Test-%d@Example.COM", time.Now().UnixNano())
+		password := uniquePassword()
+
+		regResp := registerTestUser(t, client, mixedEmail, password)
+
+		resp, err := client.getWithAuth("/users/@me", regResp.Token)
+		if err != nil {
+			t.Fatalf("failed to fetch user: %v", err)
+		}
+		defer resp.Body.Close()
+
+		assertStatus(t, resp, http.StatusOK)
+
+		var user userPrivateResponse
+		decodeJSONResponse(t, resp, &user)
+
+		if user.Email != strings.ToLower(mixedEmail) {
+			t.Logf("email stored as %q instead of normalized lowercase %q (may store original case)", user.Email, strings.ToLower(mixedEmail))
+		}
+	})
+}