From f1e742dcf4e8fb14f49e791705d7e02053cc8dba Mon Sep 17 00:00:00 2001
From: Kaspar Schleiser <kaspar@schleiser.de>
Date: Thu, 8 Oct 2015 13:45:21 +0200
Subject: [PATCH] tests: unittests: add unittests for div.h
---
tests/unittests/tests-div/Makefile | 1 +
tests/unittests/tests-div/tests-div.c | 120 ++++++++++++++++++++++++++
tests/unittests/tests-div/tests-div.h | 43 +++++++++
3 files changed, 164 insertions(+)
create mode 100644 tests/unittests/tests-div/Makefile
create mode 100644 tests/unittests/tests-div/tests-div.c
create mode 100644 tests/unittests/tests-div/tests-div.h
diff --git a/tests/unittests/tests-div/Makefile b/tests/unittests/tests-div/Makefile
new file mode 100644
index 0000000000..48422e909a
--- /dev/null
+++ b/tests/unittests/tests-div/Makefile
@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base
diff --git a/tests/unittests/tests-div/tests-div.c b/tests/unittests/tests-div/tests-div.c
new file mode 100644
index 0000000000..824d1952a3
--- /dev/null
+++ b/tests/unittests/tests-div/tests-div.c
@@ -0,0 +1,120 @@
+/*
+* Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
+*
+* This file is subject to the terms and conditions of the GNU Lesser
+* General Public License v2.1. See the file LICENSE in the top level
+* directory for more details.
+*/
+
+#include <string.h>
+#include "embUnit.h"
+#include "tests-div.h"
+
+#include "div.h"
+
+#define ENABLE_DEBUG (0)
+#include "debug.h"
+
+static uint32_t u32_test_values[] = {
+ 0,
+ 1,
+ 10,
+ 32,
+ 15625,
+ 15625LU*5,
+ (15625LU*5)+1,
+ 0xffff,
+ 0xffff<<10,
+ 0xffffffff
+};
+
+static uint64_t u64_test_values[] = {
+ 0xffffffffULL+1
+};
+
+#define N_U32_VALS (sizeof(u32_test_values)/sizeof(uint32_t))
+#define N_U64_VALS (sizeof(u64_test_values)/sizeof(uint64_t))
+
+static void test_div_u64_by_15625(void)
+{
+ for (unsigned i = 0; i < N_U32_VALS; i++) {
+ DEBUG("Dividing %"PRIu32" by 15625...\n", u32_test_values[i]);
+ TEST_ASSERT_EQUAL_INT(
+ div_u64_by_15625(u32_test_values[i]),
+ u32_test_values[i]/15625);
+ }
+
+ for (unsigned i = 0; i < N_U64_VALS; i++) {
+ DEBUG("Dividing %"PRIu64" by 15625...\n", u64_test_values[i]);
+ TEST_ASSERT_EQUAL_INT(
+ div_u64_by_15625(u64_test_values[i]),
+ u64_test_values[i]/15625);
+ }
+}
+
+static void test_div_u32_by_15625div512(void)
+{
+ for (unsigned i = 0; i < N_U32_VALS; i++) {
+ DEBUG("Dividing %"PRIu32" by (15625/512)...\n", u32_test_values[i]);
+ TEST_ASSERT_EQUAL_INT(
+ div_u32_by_15625div512(u32_test_values[i]),
+ (uint64_t)u32_test_values[i]*512LU/15625);
+ }
+}
+
+static void test_div_u64_by_1000000(void)
+{
+ for (unsigned i = 0; i < N_U32_VALS; i++) {
+ DEBUG("Dividing %"PRIu32" by 1000000...\n", u32_test_values[i]);
+ TEST_ASSERT_EQUAL_INT(
+ div_u64_by_1000000(u32_test_values[i]),
+ u32_test_values[i]/1000000);
+ }
+
+ for (unsigned i = 0; i < N_U64_VALS; i++) {
+ DEBUG("Dividing %"PRIu64" by 1000000...\n", u64_test_values[i]);
+ TEST_ASSERT_EQUAL_INT(
+ div_u64_by_1000000(u64_test_values[i]),
+ u64_test_values[i]/1000000U);
+ }
+}
+
+static void test_div_u32_by_10(void)
+{
+ for (unsigned i = 0; i < N_U32_VALS; i++) {
+ DEBUG("Dividing %"PRIu32" by 10...\n", u32_test_values[i]);
+ TEST_ASSERT_EQUAL_INT(
+ div_u32_by_10(u32_test_values[i]),
+ u32_test_values[i]/10);
+ }
+}
+
+static void test_div_u32_mod_10(void)
+{
+ for (unsigned i = 0; i < N_U32_VALS; i++) {
+ DEBUG("Calculating %"PRIu32" % 10...\n", u32_test_values[i]);
+ TEST_ASSERT_EQUAL_INT(
+ div_u32_mod_10(u32_test_values[i]),
+ u32_test_values[i]%10);
+ }
+}
+
+Test *tests_div_tests(void)
+{
+ EMB_UNIT_TESTFIXTURES(fixtures) {
+ new_TestFixture(test_div_u64_by_15625),
+ new_TestFixture(test_div_u32_by_15625div512),
+ new_TestFixture(test_div_u64_by_1000000),
+ new_TestFixture(test_div_u32_by_10),
+ new_TestFixture(test_div_u32_mod_10),
+ };
+
+ EMB_UNIT_TESTCALLER(div_tests, NULL, NULL, fixtures);
+
+ return (Test *)&div_tests;
+}
+
+void tests_div(void)
+{
+ TESTS_RUN(tests_div_tests());
+}
diff --git a/tests/unittests/tests-div/tests-div.h b/tests/unittests/tests-div/tests-div.h
new file mode 100644
index 0000000000..037ee6b021
--- /dev/null
+++ b/tests/unittests/tests-div/tests-div.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @addtogroup unittests
+ * @{
+ *
+ * @file
+ * @brief Unittests for the ``div`` header
+ *
+ * @author Kaspar Schleiser <kaspar@schleiser.de>
+ */
+#ifndef TESTS_DIV_H_
+#define TESTS_DIV_H_
+#include "embUnit/embUnit.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+* @brief The entry point of this test suite.
+*/
+void tests_div(void);
+
+/**
+ * @brief Generates tests for div
+ *
+ * @return embUnit tests if successful, NULL if not.
+ */
+Test *tests_div_tests(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TESTS_DIV_H_ */
+/** @} */
--
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