Import of the watch repository from Pebble

tests/fw/test_freertos_utils.c

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "os/tick.h"
+
+#include "FreeRTOS.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "clar.h"
+
+// Stubs
+///////////////////////////////////////////////////////////
+#include "stubs_passert.h"
+#include "stubs_logging.h"
+#include "stubs_tick.h"
+
+// Tests
+///////////////////////////////////////////////////////////
+
+static const double s_tick_rate_hz = configTICK_RATE_HZ;
+
+static double milliseconds_to_ticks_double(double milliseconds) {
+  return (milliseconds * s_tick_rate_hz) / 1000.0;
+}
+
+void test_freertos_utils__should_convert_48h_to_ticks(void) {
+  uint32_t time_ms = 24 * 7 * 60 * 60 * 1000;
+  cl_assert_equal_i(milliseconds_to_ticks(time_ms), (uint32_t)milliseconds_to_ticks_double(time_ms));
+}
+
+void test_freertos_utils__should_convert_max_to_ticks(void) {
+  const uint32_t uint32_max = ~0;
+
+  // The maximum input time possible until overflow
+  uint32_t max_time_ms = ((double)uint32_max * 1000.0) / s_tick_rate_hz;
+
+  cl_assert(milliseconds_to_ticks(max_time_ms) == (uint32_max - 1));
+  cl_assert(milliseconds_to_ticks(max_time_ms) == (uint32_t)milliseconds_to_ticks_double(max_time_ms));
+}