2 * Copyright 2017 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/ConstexprMath.h>
19 #include <folly/portability/GTest.h>
23 class ConstexprMathTest : public testing::Test {};
26 TEST_F(ConstexprMathTest, constexpr_abs_unsigned) {
27 constexpr auto v = uint32_t(17);
28 constexpr auto a = folly::constexpr_abs(v);
30 EXPECT_TRUE((std::is_same<const uint32_t, decltype(a)>::value));
33 TEST_F(ConstexprMathTest, constexpr_abs_signed_positive) {
34 constexpr auto v = int32_t(17);
35 constexpr auto a = folly::constexpr_abs(v);
37 EXPECT_TRUE((std::is_same<const uint32_t, decltype(a)>::value));
40 TEST_F(ConstexprMathTest, constexpr_abs_signed_negative) {
41 constexpr auto v = int32_t(-17);
42 constexpr auto a = folly::constexpr_abs(v);
44 EXPECT_TRUE((std::is_same<const uint32_t, decltype(a)>::value));
47 TEST_F(ConstexprMathTest, constexpr_abs_float_positive) {
48 constexpr auto v = 17.5f;
49 constexpr auto a = folly::constexpr_abs(v);
51 EXPECT_TRUE((std::is_same<const float, decltype(a)>::value));
54 TEST_F(ConstexprMathTest, constexpr_abs_float_negative) {
55 constexpr auto v = -17.5f;
56 constexpr auto a = folly::constexpr_abs(v);
58 EXPECT_TRUE((std::is_same<const float, decltype(a)>::value));
61 TEST_F(ConstexprMathTest, constexpr_abs_double_positive) {
62 constexpr auto v = 17.5;
63 constexpr auto a = folly::constexpr_abs(v);
65 EXPECT_TRUE((std::is_same<const double, decltype(a)>::value));
68 TEST_F(ConstexprMathTest, constexpr_abs_double_negative) {
69 constexpr auto v = -17.5;
70 constexpr auto a = folly::constexpr_abs(v);
72 EXPECT_TRUE((std::is_same<const double, decltype(a)>::value));
75 TEST_F(ConstexprMathTest, constexpr_log2_1) {
76 constexpr auto v = 1ull;
77 constexpr auto a = folly::constexpr_log2(v);
79 EXPECT_TRUE((std::is_same<decltype(v), decltype(a)>::value));
82 TEST_F(ConstexprMathTest, constexpr_log2_2) {
83 constexpr auto v = 2ull;
84 constexpr auto a = folly::constexpr_log2(v);
86 EXPECT_TRUE((std::is_same<decltype(v), decltype(a)>::value));
89 TEST_F(ConstexprMathTest, constexpr_log2_64) {
90 constexpr auto v = 64ull;
91 constexpr auto a = folly::constexpr_log2(v);
93 EXPECT_TRUE((std::is_same<decltype(v), decltype(a)>::value));