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deps/oblib/unittest/lib/random/test_random.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include <gtest/gtest.h>
+#include "lib/random/ob_random.h"
+
+namespace oceanbase {
+namespace common {
+
+TEST(ObRandom, normal)
+{
+  int64_t res = 0;
+  // test static methods
+  res = ObRandom::rand(10, 10);
+  ASSERT_EQ(10, res);
+  res = ObRandom::rand(0, 100);
+  ASSERT_TRUE(res <= 100 && res >= 0);
+  res = ObRandom::rand(-1, -2);
+  ASSERT_TRUE(res >= -2 && res <= -1);
+  res = ObRandom::rand(10, 1);
+  ASSERT_TRUE(res >= 1 && res <= 10);
+
+  // test int64_t random number
+  ObRandom rand1;
+  res = rand1.get();
+  res = rand1.get(10, 10);
+  ASSERT_EQ(10, res);
+  res = rand1.get(0, 100);
+  ASSERT_TRUE(res <= 100 && res >= 0);
+  res = rand1.get(-1, -2);
+  ASSERT_TRUE(res >= -2 && res <= -1);
+  res = rand1.get(10, 1);
+  ASSERT_TRUE(res >= 1 && res <= 10);
+
+  // test int32_t random number
+  res = rand1.get_int32();
+  res = rand1.get_int32(10, 10);
+  ASSERT_EQ(10, res);
+  res = rand1.get_int32(0, 100);
+  ASSERT_TRUE(res <= 100 && res >= 0);
+  res = rand1.get_int32(-1, -2);
+  ASSERT_TRUE(res >= -2 && res <= -1);
+  res = rand1.get_int32(10, 1);
+  ASSERT_TRUE(res >= 1 && res <= 10);
+}
+
+}  // namespace common
+}  // namespace oceanbase
+
+int main(int argc, char** argv)
+{
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}