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Diffstat (limited to 'third_party/abseil_cpp/absl/strings/internal/pow10_helper_test.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/strings/internal/pow10_helper_test.cc | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/third_party/abseil_cpp/absl/strings/internal/pow10_helper_test.cc b/third_party/abseil_cpp/absl/strings/internal/pow10_helper_test.cc deleted file mode 100644 index a4ff76d31e..0000000000 --- a/third_party/abseil_cpp/absl/strings/internal/pow10_helper_test.cc +++ /dev/null @@ -1,122 +0,0 @@ -// Copyright 2018 The Abseil Authors. -// -// 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 -// -// https://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 "absl/strings/internal/pow10_helper.h" - -#include <cmath> - -#include "gtest/gtest.h" -#include "absl/strings/str_format.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace strings_internal { - -namespace { - -struct TestCase { - int power; // Testing Pow10(power) - uint64_t significand; // Raw bits of the expected value - int radix; // significand is adjusted by 2^radix -}; - -TEST(Pow10HelperTest, Works) { - // The logic in pow10_helper.cc is so simple that theoretically we don't even - // need a test. However, we're paranoid and believe that there may be - // compilers that don't round floating-point literals correctly, even though - // it is specified by the standard. We check various edge cases, just to be - // sure. - constexpr TestCase kTestCases[] = { - // Subnormals - {-323, 0x2, -1074}, - {-322, 0x14, -1074}, - {-321, 0xca, -1074}, - {-320, 0x7e8, -1074}, - {-319, 0x4f10, -1074}, - {-318, 0x316a2, -1074}, - {-317, 0x1ee257, -1074}, - {-316, 0x134d761, -1074}, - {-315, 0xc1069cd, -1074}, - {-314, 0x78a42205, -1074}, - {-313, 0x4b6695433, -1074}, - {-312, 0x2f201d49fb, -1074}, - {-311, 0x1d74124e3d1, -1074}, - {-310, 0x12688b70e62b, -1074}, - {-309, 0xb8157268fdaf, -1074}, - {-308, 0x730d67819e8d2, -1074}, - // Values that are very close to rounding the other way. - // Comment shows difference of significand from the true value. - {-307, 0x11fa182c40c60d, -1072}, // -.4588 - {-290, 0x18f2b061aea072, -1016}, // .4854 - {-276, 0x11BA03F5B21000, -969}, // .4709 - {-259, 0x1899C2F6732210, -913}, // .4830 - {-252, 0x1D53844EE47DD1, -890}, // -.4743 - {-227, 0x1E5297287C2F45, -807}, // -.4708 - {-198, 0x1322E220A5B17E, -710}, // -.4714 - {-195, 0x12B010D3E1CF56, -700}, // .4928 - {-192, 0x123FF06EEA847A, -690}, // .4968 - {-163, 0x1708D0F84D3DE7, -594}, // -.4977 - {-145, 0x13FAAC3E3FA1F3, -534}, // -.4785 - {-111, 0x133D4032C2C7F5, -421}, // .4774 - {-106, 0x1D5B561574765B, -405}, // -.4869 - {-104, 0x16EF5B40C2FC77, -398}, // -.4741 - {-88, 0x197683DF2F268D, -345}, // -.4738 - {-86, 0x13E497065CD61F, -338}, // .4736 - {-76, 0x17288E1271F513, -305}, // -.4761 - {-63, 0x1A53FC9631D10D, -262}, // .4929 - {-30, 0x14484BFEEBC2A0, -152}, // .4758 - {-21, 0x12E3B40A0E9B4F, -122}, // -.4916 - {-5, 0x14F8B588E368F1, -69}, // .4829 - {23, 0x152D02C7E14AF6, 24}, // -.5000 (exactly, round-to-even) - {29, 0x1431E0FAE6D721, 44}, // -.4870 - {34, 0x1ED09BEAD87C03, 60}, // -.4721 - {70, 0x172EBAD6DDC73D, 180}, // .4733 - {105, 0x1BE7ABD3781ECA, 296}, // -.4850 - {126, 0x17A2ECC414A03F, 366}, // -.4999 - {130, 0x1CDA62055B2D9E, 379}, // .4855 - {165, 0x115D847AD00087, 496}, // -.4913 - {172, 0x14B378469B6732, 519}, // .4818 - {187, 0x1262DFEEBBB0F9, 569}, // -.4805 - {210, 0x18557F31326BBB, 645}, // -.4992 - {212, 0x1302CB5E6F642A, 652}, // -.4838 - {215, 0x1290BA9A38C7D1, 662}, // -.4881 - {236, 0x1F736F9B3494E9, 731}, // .4707 - {244, 0x176EC98994F489, 758}, // .4924 - {250, 0x1658E3AB795204, 778}, // -.4963 - {252, 0x117571DDF6C814, 785}, // .4873 - {254, 0x1B4781EAD1989E, 791}, // -.4887 - {260, 0x1A03FDE214CAF1, 811}, // .4784 - {284, 0x1585041B2C477F, 891}, // .4798 - {304, 0x1D2A1BE4048F90, 957}, // -.4987 - // Out-of-range values - {-324, 0x0, 0}, - {-325, 0x0, 0}, - {-326, 0x0, 0}, - {309, 1, 2000}, - {310, 1, 2000}, - {311, 1, 2000}, - }; - for (const TestCase& test_case : kTestCases) { - EXPECT_EQ(Pow10(test_case.power), - std::ldexp(test_case.significand, test_case.radix)) - << absl::StrFormat("Failure for Pow10(%d): %a vs %a", test_case.power, - Pow10(test_case.power), - std::ldexp(test_case.significand, test_case.radix)); - } -} - -} // namespace -} // namespace strings_internal -ABSL_NAMESPACE_END -} // namespace absl |