feat: mail service

integration/gatewayauthsessionuser/gateway_authsession_user_test.go

@@ -61,6 +61,30 @@ func TestGatewayAuthsessionUserExistingAccountKeepsCreateOnlySettings(t *testing
 	require.Equal(t, "Europe/Paris", accountResponse.Account.TimeZone)
 }
 
+func TestGatewayAuthsessionUserAcceptLanguageSetsLocalizedPreferredLanguage(t *testing.T) {
+	h := newGatewayAuthsessionUserHarness(t)
+
+	const email = "localized@example.com"
+
+	challengeID := h.sendChallengeWithAcceptLanguage(t, email, "fr-FR, en;q=0.8")
+	deliveries := h.mailStub.RecordedDeliveries()
+	require.NotEmpty(t, deliveries)
+	require.Equal(t, "fr-FR", deliveries[len(deliveries)-1].Locale)
+
+	code := lastMailCodeFor(t, h.mailStub, email)
+	clientPrivateKey := newClientPrivateKey("localized-account")
+
+	confirmResponse := h.confirmCode(t, challengeID, code, clientPrivateKey)
+	var confirmBody struct {
+		DeviceSessionID string `json:"device_session_id"`
+	}
+	requireJSONStatus(t, confirmResponse, http.StatusOK, &confirmBody)
+
+	accountResponse := h.executeGetMyAccount(t, confirmBody.DeviceSessionID, "request-localized-account", clientPrivateKey)
+	require.Equal(t, "fr-FR", accountResponse.Account.PreferredLanguage)
+	require.Equal(t, gatewayAuthsessionUserTestTimeZone, accountResponse.Account.TimeZone)
+}
+
 func TestGatewayAuthsessionUserBlockedEmailAndUserBehavior(t *testing.T) {
 	h := newGatewayAuthsessionUserHarness(t)