Add test for session resumption
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 833b5e3..7028a07 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -5068,6 +5068,32 @@
-c "found fragmented DTLS handshake message" \
-C "error"
+# This ensures things still work after session_reset(),
+# for example it would have caught #1941.
+# It also exercises the "resumed hanshake" flow.
+# Since we don't support reading fragmented ClientHello yet,
+# up the MTU to 1450 (larger than ClientHello with session ticket,
+# but still smaller than client's Certificate to ensure fragmentation).
+requires_config_enabled MBEDTLS_SSL_PROTO_DTLS
+requires_config_enabled MBEDTLS_RSA_C
+requires_config_enabled MBEDTLS_ECDSA_C
+run_test "DTLS fragmenting: proxy MTU, resumed handshake" \
+ -p "$P_PXY mtu=1450" \
+ "$P_SRV dtls=1 debug_level=2 auth_mode=required \
+ crt_file=data_files/server7_int-ca.crt \
+ key_file=data_files/server7.key \
+ mtu=1450" \
+ "$P_CLI dtls=1 debug_level=2 \
+ crt_file=data_files/server8_int-ca2.crt \
+ key_file=data_files/server8.key \
+ mtu=1450 reconnect=1" \
+ 0 \
+ -S "resend" \
+ -C "resend" \
+ -s "found fragmented DTLS handshake message" \
+ -c "found fragmented DTLS handshake message" \
+ -C "error"
+
requires_config_enabled MBEDTLS_SSL_PROTO_DTLS
requires_config_enabled MBEDTLS_RSA_C
requires_config_enabled MBEDTLS_ECDSA_C
