1 files changed, 57 insertions, 0 deletions
diff --git a/tests/suites/test_suite_timing.function b/tests/suites/test_suite_timing.function
new file mode 100644
index 00000000000..4143a1c5112
--- /dev/null
+++ b/tests/suites/test_suite_timing.function
@@ -0,0 +1,57 @@
+/* BEGIN_HEADER */
+
+/* This test module exercises the timing module. Since, depending on the
+ * underlying operating system, the timing routines are not always reliable,
+ * this suite only performs very basic sanity checks of the timing API.
+ */
+
+#include <limits.h>
+
+#include "mbedtls/timing.h"
+
+/* END_HEADER */
+
+/* BEGIN_DEPENDENCIES
+ * depends_on:MBEDTLS_TIMING_C
+ * END_DEPENDENCIES
+ */
+
+/* BEGIN_CASE */
+void timing_get_timer()
+{
+    struct mbedtls_timing_hr_time time;
+
+    memset(&time, 0, sizeof(time));
+
+    (void) mbedtls_timing_get_timer(&time, 1);
+
+    /* Check that a non-zero time was written back */
+    int all_zero = 1;
+    for (size_t i = 0; i < sizeof(time); i++) {
+        all_zero &= ((unsigned char *) &time)[i] == 0;
+    }
+    TEST_ASSERT(!all_zero);
+
+    (void) mbedtls_timing_get_timer(&time, 0);
+
+    /* This goto is added to avoid warnings from the generated code. */
+    goto exit;
+}
+/* END_CASE */
+
+/* BEGIN_CASE */
+void timing_delay(int fin_ms)
+{
+    mbedtls_timing_delay_context ctx;
+    int result;
+    if (fin_ms == 0) {
+        mbedtls_timing_set_delay(&ctx, 0, 0);
+        result = mbedtls_timing_get_delay(&ctx);
+        TEST_ASSERT(result == -1);
+    } else {
+        mbedtls_timing_set_delay(&ctx, fin_ms / 2, fin_ms);
+        result = mbedtls_timing_get_delay(&ctx);
+        TEST_ASSERT(result >= 0 && result <= 2);
+    }
+}
+/* END_CASE */