Add check for the ecp module variants

Signed-off-by: Gabor Mezei <gabor.mezei@arm.com>
diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index 2658a43..03bbab6 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -1630,3 +1630,18 @@
     mbedtls_free(rX_raw);
 }
 /* END_CASE */
+
+/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS */
+void check_variant()
+{
+    mbedtls_ecp_variant variant = mbedtls_ecp_get_variant();
+
+#if defined(MBEDTLS_ECP_WITH_MPI_STRUCT)
+    TEST_EQUAL(variant, MBEDTLS_ECP_VARIANT_WITH_MPI_STRUCT);
+#elif defined(MBEDTLS_ECP_WITH_MPI_UINT)
+    TEST_EQUAL(variant, MBEDTLS_ECP_VARIANT_WITH_MPI_UINT);
+#else
+    #error "No ecp variant detected."
+#endif
+}
+/* END_CASE */