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Diffstat (limited to 'absl/flags/flag_test.cc')
| -rw-r--r-- | absl/flags/flag_test.cc | 482 |
1 files changed, 482 insertions, 0 deletions
diff --git a/absl/flags/flag_test.cc b/absl/flags/flag_test.cc new file mode 100644 index 00000000..1bcd7e96 --- /dev/null +++ b/absl/flags/flag_test.cc @@ -0,0 +1,482 @@ +// +// Copyright 2019 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/flags/flag.h" + +#include "gtest/gtest.h" +#include "absl/strings/match.h" +#include "absl/strings/numbers.h" +#include "absl/strings/str_cat.h" +#include "absl/strings/str_split.h" + +ABSL_DECLARE_FLAG(int64_t, mistyped_int_flag); +ABSL_DECLARE_FLAG(std::vector<std::string>, mistyped_string_flag); + +namespace { + +namespace flags = absl::flags_internal; + +std::string TestHelpMsg() { return "help"; } +template <typename T> +void* TestMakeDflt() { + return new T{}; +} +void TestCallback() {} + +template <typename T> +bool TestConstructionFor() { + constexpr flags::Flag<T> f1("f1", &TestHelpMsg, "file", + &absl::flags_internal::FlagMarshallingOps<T>, + &TestMakeDflt<T>); + EXPECT_EQ(f1.Name(), "f1"); + EXPECT_EQ(f1.Help(), "help"); + EXPECT_EQ(f1.Filename(), "file"); + + ABSL_CONST_INIT static flags::Flag<T> f2( + "f2", &TestHelpMsg, "file", &absl::flags_internal::FlagMarshallingOps<T>, + &TestMakeDflt<T>); + flags::FlagRegistrar<T, false>(&f2).OnUpdate(TestCallback); + + EXPECT_EQ(f2.Name(), "f2"); + EXPECT_EQ(f2.Help(), "help"); + EXPECT_EQ(f2.Filename(), "file"); + + return true; +} + +struct UDT { + UDT() = default; + UDT(const UDT&) = default; +}; +bool AbslParseFlag(absl::string_view, UDT*, std::string*) { return true; } +std::string AbslUnparseFlag(const UDT&) { return ""; } + +TEST(FlagTest, TestConstruction) { + TestConstructionFor<bool>(); + TestConstructionFor<int16_t>(); + TestConstructionFor<uint16_t>(); + TestConstructionFor<int32_t>(); + TestConstructionFor<uint32_t>(); + TestConstructionFor<int64_t>(); + TestConstructionFor<uint64_t>(); + TestConstructionFor<double>(); + TestConstructionFor<float>(); + TestConstructionFor<std::string>(); + + TestConstructionFor<UDT>(); +} + +// -------------------------------------------------------------------- + +} // namespace + +ABSL_DECLARE_FLAG(bool, test_flag_01); +ABSL_DECLARE_FLAG(int, test_flag_02); +ABSL_DECLARE_FLAG(int16_t, test_flag_03); +ABSL_DECLARE_FLAG(uint16_t, test_flag_04); +ABSL_DECLARE_FLAG(int32_t, test_flag_05); +ABSL_DECLARE_FLAG(uint32_t, test_flag_06); +ABSL_DECLARE_FLAG(int64_t, test_flag_07); +ABSL_DECLARE_FLAG(uint64_t, test_flag_08); +ABSL_DECLARE_FLAG(double, test_flag_09); +ABSL_DECLARE_FLAG(float, test_flag_10); +ABSL_DECLARE_FLAG(std::string, test_flag_11); + +namespace { + +#if !ABSL_FLAGS_STRIP_NAMES + +TEST(FlagTest, TestFlagDeclaration) { + // test that we can access flag objects. + EXPECT_EQ(FLAGS_test_flag_01.Name(), "test_flag_01"); + EXPECT_EQ(FLAGS_test_flag_02.Name(), "test_flag_02"); + EXPECT_EQ(FLAGS_test_flag_03.Name(), "test_flag_03"); + EXPECT_EQ(FLAGS_test_flag_04.Name(), "test_flag_04"); + EXPECT_EQ(FLAGS_test_flag_05.Name(), "test_flag_05"); + EXPECT_EQ(FLAGS_test_flag_06.Name(), "test_flag_06"); + EXPECT_EQ(FLAGS_test_flag_07.Name(), "test_flag_07"); + EXPECT_EQ(FLAGS_test_flag_08.Name(), "test_flag_08"); + EXPECT_EQ(FLAGS_test_flag_09.Name(), "test_flag_09"); + EXPECT_EQ(FLAGS_test_flag_10.Name(), "test_flag_10"); + EXPECT_EQ(FLAGS_test_flag_11.Name(), "test_flag_11"); +} +#endif // !ABSL_FLAGS_STRIP_NAMES + +// -------------------------------------------------------------------- + +} // namespace + +ABSL_FLAG(bool, test_flag_01, true, "test flag 01"); +ABSL_FLAG(int, test_flag_02, 1234, "test flag 02"); +ABSL_FLAG(int16_t, test_flag_03, -34, "test flag 03"); +ABSL_FLAG(uint16_t, test_flag_04, 189, "test flag 04"); +ABSL_FLAG(int32_t, test_flag_05, 10765, "test flag 05"); +ABSL_FLAG(uint32_t, test_flag_06, 40000, "test flag 06"); +ABSL_FLAG(int64_t, test_flag_07, -1234567, "test flag 07"); +ABSL_FLAG(uint64_t, test_flag_08, 9876543, "test flag 08"); +ABSL_FLAG(double, test_flag_09, -9.876e-50, "test flag 09"); +ABSL_FLAG(float, test_flag_10, 1.234e12f, "test flag 10"); +ABSL_FLAG(std::string, test_flag_11, "", "test flag 11"); + +namespace { + +#if !ABSL_FLAGS_STRIP_NAMES +TEST(FlagTest, TestFlagDefinition) { + absl::string_view expected_file_name = "absl/flags/flag_test.cc"; + + EXPECT_EQ(FLAGS_test_flag_01.Name(), "test_flag_01"); + EXPECT_EQ(FLAGS_test_flag_01.Help(), "test flag 01"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_01.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_02.Name(), "test_flag_02"); + EXPECT_EQ(FLAGS_test_flag_02.Help(), "test flag 02"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_02.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_03.Name(), "test_flag_03"); + EXPECT_EQ(FLAGS_test_flag_03.Help(), "test flag 03"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_03.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_04.Name(), "test_flag_04"); + EXPECT_EQ(FLAGS_test_flag_04.Help(), "test flag 04"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_04.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_05.Name(), "test_flag_05"); + EXPECT_EQ(FLAGS_test_flag_05.Help(), "test flag 05"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_05.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_06.Name(), "test_flag_06"); + EXPECT_EQ(FLAGS_test_flag_06.Help(), "test flag 06"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_06.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_07.Name(), "test_flag_07"); + EXPECT_EQ(FLAGS_test_flag_07.Help(), "test flag 07"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_07.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_08.Name(), "test_flag_08"); + EXPECT_EQ(FLAGS_test_flag_08.Help(), "test flag 08"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_08.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_09.Name(), "test_flag_09"); + EXPECT_EQ(FLAGS_test_flag_09.Help(), "test flag 09"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_09.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_10.Name(), "test_flag_10"); + EXPECT_EQ(FLAGS_test_flag_10.Help(), "test flag 10"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_10.Filename(), expected_file_name)); + + EXPECT_EQ(FLAGS_test_flag_11.Name(), "test_flag_11"); + EXPECT_EQ(FLAGS_test_flag_11.Help(), "test flag 11"); + EXPECT_TRUE( + absl::EndsWith(FLAGS_test_flag_11.Filename(), expected_file_name)); +} +#endif // !ABSL_FLAGS_STRIP_NAMES + +// -------------------------------------------------------------------- + +TEST(FlagTest, TestDefault) { + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_01), true); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_02), 1234); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_03), -34); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_04), 189); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_05), 10765); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_06), 40000); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_07), -1234567); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 9876543); + EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_09), -9.876e-50, 1e-55); + EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_10), 1.234e12f, 1e5f); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_11), ""); +} + +// -------------------------------------------------------------------- + +TEST(FlagTest, TestGetSet) { + absl::SetFlag(&FLAGS_test_flag_01, false); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_01), false); + + absl::SetFlag(&FLAGS_test_flag_02, 321); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_02), 321); + + absl::SetFlag(&FLAGS_test_flag_03, 67); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_03), 67); + + absl::SetFlag(&FLAGS_test_flag_04, 1); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_04), 1); + + absl::SetFlag(&FLAGS_test_flag_05, -908); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_05), -908); + + absl::SetFlag(&FLAGS_test_flag_06, 4001); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_06), 4001); + + absl::SetFlag(&FLAGS_test_flag_07, -23456); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_07), -23456); + + absl::SetFlag(&FLAGS_test_flag_08, 975310); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_08), 975310); + + absl::SetFlag(&FLAGS_test_flag_09, 1.00001); + EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_09), 1.00001, 1e-10); + + absl::SetFlag(&FLAGS_test_flag_10, -3.54f); + EXPECT_NEAR(absl::GetFlag(FLAGS_test_flag_10), -3.54f, 1e-6f); + + absl::SetFlag(&FLAGS_test_flag_11, "asdf"); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_11), "asdf"); +} + +// -------------------------------------------------------------------- + +int GetDflt1() { return 1; } + +} // namespace + +ABSL_FLAG(int, test_flag_12, GetDflt1(), "test flag 12"); +ABSL_FLAG(std::string, test_flag_13, absl::StrCat("AAA", "BBB"), + "test flag 13"); + +namespace { + +TEST(FlagTest, TestNonConstexprDefault) { + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_12), 1); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_13), "AAABBB"); +} + +// -------------------------------------------------------------------- + +} // namespace + +ABSL_FLAG(bool, test_flag_14, true, absl::StrCat("test ", "flag ", "14")); + +namespace { + +#if !ABSL_FLAGS_STRIP_HELP +TEST(FlagTest, TestNonConstexprHelp) { + EXPECT_EQ(FLAGS_test_flag_14.Help(), "test flag 14"); +} +#endif //! ABSL_FLAGS_STRIP_HELP + +// -------------------------------------------------------------------- + +int cb_test_value = -1; +void TestFlagCB(); + +} // namespace + +ABSL_FLAG(int, test_flag_with_cb, 100, "").OnUpdate(TestFlagCB); + +ABSL_FLAG(int, test_flag_with_lambda_cb, 200, "").OnUpdate([]() { + cb_test_value = absl::GetFlag(FLAGS_test_flag_with_lambda_cb) + + absl::GetFlag(FLAGS_test_flag_with_cb); +}); + +namespace { + +void TestFlagCB() { cb_test_value = absl::GetFlag(FLAGS_test_flag_with_cb); } + +// Tests side-effects of callback invocation. +TEST(FlagTest, CallbackInvocation) { + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_with_cb), 100); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_with_lambda_cb), 200); + EXPECT_EQ(cb_test_value, 300); + + absl::SetFlag(&FLAGS_test_flag_with_cb, 1); + EXPECT_EQ(cb_test_value, 1); + + absl::SetFlag(&FLAGS_test_flag_with_lambda_cb, 3); + EXPECT_EQ(cb_test_value, 4); +} + +// -------------------------------------------------------------------- + +struct CustomUDT { + CustomUDT() : a(1), b(1) {} + CustomUDT(int a_, int b_) : a(a_), b(b_) {} + + friend bool operator==(const CustomUDT& f1, const CustomUDT& f2) { + return f1.a == f2.a && f1.b == f2.b; + } + + int a; + int b; +}; +bool AbslParseFlag(absl::string_view in, CustomUDT* f, std::string*) { + std::vector<absl::string_view> parts = + absl::StrSplit(in, ':', absl::SkipWhitespace()); + + if (parts.size() != 2) return false; + + if (!absl::SimpleAtoi(parts[0], &f->a)) return false; + + if (!absl::SimpleAtoi(parts[1], &f->b)) return false; + + return true; +} +std::string AbslUnparseFlag(const CustomUDT& f) { + return absl::StrCat(f.a, ":", f.b); +} + +} // namespace + +ABSL_FLAG(CustomUDT, test_flag_15, CustomUDT(), "test flag 15"); + +namespace { + +TEST(FlagTest, TestCustomUDT) { + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_15), CustomUDT(1, 1)); + absl::SetFlag(&FLAGS_test_flag_15, CustomUDT(2, 3)); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_15), CustomUDT(2, 3)); +} + +// MSVC produces link error on the type mismatch. +// Linux does not have build errors and validations work as expected. +#if 0 // !defined(_WIN32) && GTEST_HAS_DEATH_TEST + +TEST(Flagtest, TestTypeMismatchValidations) { + // For builtin types, GetFlag() only does validation in debug mode. + EXPECT_DEBUG_DEATH( + absl::GetFlag(FLAGS_mistyped_int_flag), + "Flag 'mistyped_int_flag' is defined as one type and declared " + "as another"); + EXPECT_DEATH(absl::SetFlag(&FLAGS_mistyped_int_flag, 0), + "Flag 'mistyped_int_flag' is defined as one type and declared " + "as another"); + + EXPECT_DEATH(absl::GetFlag(FLAGS_mistyped_string_flag), + "Flag 'mistyped_string_flag' is defined as one type and " + "declared as another"); + EXPECT_DEATH( + absl::SetFlag(&FLAGS_mistyped_string_flag, std::vector<std::string>{}), + "Flag 'mistyped_string_flag' is defined as one type and declared as " + "another"); +} + +#endif + +// -------------------------------------------------------------------- + +// A contrived type that offers implicit and explicit conversion from specific +// source types. +struct ConversionTestVal { + ConversionTestVal() = default; + explicit ConversionTestVal(int a_in) : a(a_in) {} + + enum class ViaImplicitConv { kTen = 10, kEleven }; + // NOLINTNEXTLINE + ConversionTestVal(ViaImplicitConv from) : a(static_cast<int>(from)) {} + + int a; +}; + +bool AbslParseFlag(absl::string_view in, ConversionTestVal* val_out, + std::string*) { + if (!absl::SimpleAtoi(in, &val_out->a)) { + return false; + } + return true; +} +std::string AbslUnparseFlag(const ConversionTestVal& val) { + return absl::StrCat(val.a); +} + +} // namespace + +// Flag default values can be specified with a value that converts to the flag +// value type implicitly. +ABSL_FLAG(ConversionTestVal, test_flag_16, + ConversionTestVal::ViaImplicitConv::kTen, "test flag 16"); + +namespace { + +TEST(FlagTest, CanSetViaImplicitConversion) { + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_16).a, 10); + absl::SetFlag(&FLAGS_test_flag_16, + ConversionTestVal::ViaImplicitConv::kEleven); + EXPECT_EQ(absl::GetFlag(FLAGS_test_flag_16).a, 11); +} + +// -------------------------------------------------------------------- + +struct NonDfltConstructible { + public: + // This constructor tests that we can initialize the flag with int value + NonDfltConstructible(int i) : value(i) {} // NOLINT + + // This constructor tests that we can't initialize the flag with char value + // but can with explicitly constructed NonDfltConstructible. + explicit NonDfltConstructible(char c) : value(100 + static_cast<int>(c)) {} + + int value; +}; + +bool AbslParseFlag(absl::string_view in, NonDfltConstructible* ndc_out, + std::string*) { + return absl::SimpleAtoi(in, &ndc_out->value); +} +std::string AbslUnparseFlag(const NonDfltConstructible& ndc) { + return absl::StrCat(ndc.value); +} + +} // namespace + +ABSL_FLAG(NonDfltConstructible, ndc_flag1, NonDfltConstructible('1'), + "Flag with non default constructible type"); +ABSL_FLAG(NonDfltConstructible, ndc_flag2, 0, + "Flag with non default constructible type"); + +namespace { + +TEST(FlagTest, TestNonDefaultConstructibleType) { + EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag1).value, '1' + 100); + EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag2).value, 0); + + absl::SetFlag(&FLAGS_ndc_flag1, NonDfltConstructible('A')); + absl::SetFlag(&FLAGS_ndc_flag2, 25); + + EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag1).value, 'A' + 100); + EXPECT_EQ(absl::GetFlag(FLAGS_ndc_flag2).value, 25); +} + +// -------------------------------------------------------------------- + +} // namespace + +ABSL_RETIRED_FLAG(bool, old_bool_flag, true, "old descr"); +ABSL_RETIRED_FLAG(int, old_int_flag, (int)std::sqrt(10), "old descr"); +ABSL_RETIRED_FLAG(std::string, old_str_flag, "", absl::StrCat("old ", "descr")); + +namespace { + +TEST(FlagTest, TestRetiredFlagRegistration) { + bool is_bool = false; + EXPECT_TRUE(flags::IsRetiredFlag("old_bool_flag", &is_bool)); + EXPECT_TRUE(is_bool); + EXPECT_TRUE(flags::IsRetiredFlag("old_int_flag", &is_bool)); + EXPECT_FALSE(is_bool); + EXPECT_TRUE(flags::IsRetiredFlag("old_str_flag", &is_bool)); + EXPECT_FALSE(is_bool); + EXPECT_FALSE(flags::IsRetiredFlag("some_other_flag", &is_bool)); +} + +} // namespace |