1 files changed, 84 insertions, 0 deletions
diff --git a/test/unit/hwclock.c b/test/unit/hwclock.c
new file mode 100644
index 0000000..6462c5c
--- /dev/null
+++ b/test/unit/hwclock.c
@@ -0,0 +1,84 @@
+/*
+ **********************************************************************
+ * Copyright (C) Miroslav Lichvar  2016-2018
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * 
+ **********************************************************************
+ */
+
+#include <hwclock.c>
+#include "test.h"
+
+void
+test_unit(void)
+{
+  struct timespec start_hw_ts, start_local_ts, hw_ts, local_ts, ts;
+  HCL_Instance clock;
+  double freq, jitter, interval, dj, sum;
+  int i, j, k, count;
+
+  LCL_Initialise();
+
+  for (i = 1; i <= 8; i++) {
+    clock = HCL_CreateInstance(random() % (1 << i), 1 << i, 1.0);
+
+    for (j = 0, count = 0, sum = 0.0; j < 100; j++) {
+      UTI_ZeroTimespec(&start_hw_ts);
+      UTI_ZeroTimespec(&start_local_ts);
+      UTI_AddDoubleToTimespec(&start_hw_ts, TST_GetRandomDouble(0.0, 1e9), &start_hw_ts);
+      UTI_AddDoubleToTimespec(&start_local_ts, TST_GetRandomDouble(0.0, 1e9), &start_local_ts);
+
+      DEBUG_LOG("iteration %d", j);
+
+      freq = TST_GetRandomDouble(0.9, 1.1);
+      jitter = TST_GetRandomDouble(10.0e-9, 1000.0e-9);
+      interval = TST_GetRandomDouble(0.1, 10.0);
+
+      clock->n_samples = 0;
+      clock->valid_coefs = 0;
+
+      for (k = 0; k < 100; k++) {
+        UTI_AddDoubleToTimespec(&start_hw_ts, k * interval * freq, &hw_ts);
+        UTI_AddDoubleToTimespec(&start_local_ts, k * interval, &local_ts);
+        if (HCL_CookTime(clock, &hw_ts, &ts, NULL)) {
+          dj = fabs(UTI_DiffTimespecsToDouble(&ts, &local_ts) / jitter);
+          DEBUG_LOG("delta/jitter %f", dj);
+          if (clock->n_samples >= clock->max_samples / 2)
+            sum += dj, count++;
+          TEST_CHECK(clock->n_samples < 4 || dj <= 4.0);
+          TEST_CHECK(clock->n_samples < 8 || dj <= 3.0);
+        }
+
+        UTI_AddDoubleToTimespec(&start_hw_ts, k * interval * freq + TST_GetRandomDouble(-jitter, jitter), &hw_ts);
+
+        if (HCL_NeedsNewSample(clock, &local_ts))
+          HCL_AccumulateSample(clock, &hw_ts, &local_ts, 2.0 * jitter);
+
+        TEST_CHECK(clock->valid_coefs || clock->n_samples < 2);
+
+        if (!clock->valid_coefs)
+          continue;
+
+        TEST_CHECK(fabs(clock->offset) <= 2.0 * jitter);
+      }
+    }
+
+    TEST_CHECK(sum / count < 2.4 / sqrt(clock->max_samples));
+
+    HCL_DestroyInstance(clock);
+  }
+
+  LCL_Finalise();
+}