mbedtls_mpi_random: check for invalid arguments

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_mpi.data b/tests/suites/test_suite_mpi.data
index a057dcd..fb2c553 100644
--- a/tests/suites/test_suite_mpi.data
+++ b/tests/suites/test_suite_mpi.data
@@ -1132,6 +1132,15 @@
 MPI random in range: 3..4
 mpi_random_many:1:"04":1000
 
+MPI random bad arguments: min < 0
+mpi_random_fail:-1:"04":MBEDTLS_ERR_MPI_BAD_INPUT_DATA
+
+MPI random bad arguments: min = N = 0
+mpi_random_fail:0:"00":MBEDTLS_ERR_MPI_BAD_INPUT_DATA
+
+MPI random bad arguments: min = N = 1
+mpi_random_fail:1:"01":MBEDTLS_ERR_MPI_BAD_INPUT_DATA
+
 MPI Selftest
 depends_on:MBEDTLS_SELF_TEST
 mpi_selftest: