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Diffstat (limited to 'third_party/abseil_cpp/absl/strings/internal/resize_uninitialized_test.cc')
-rw-r--r-- | third_party/abseil_cpp/absl/strings/internal/resize_uninitialized_test.cc | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/strings/internal/resize_uninitialized_test.cc b/third_party/abseil_cpp/absl/strings/internal/resize_uninitialized_test.cc new file mode 100644 index 000000000000..0f8b3c2a95b8 --- /dev/null +++ b/third_party/abseil_cpp/absl/strings/internal/resize_uninitialized_test.cc @@ -0,0 +1,82 @@ +// Copyright 2017 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/resize_uninitialized.h" + +#include "gtest/gtest.h" + +namespace { + +int resize_call_count = 0; + +// A mock string class whose only purpose is to track how many times its +// resize() method has been called. +struct resizable_string { + size_t size() const { return 0; } + char& operator[](size_t) { + static char c = '\0'; + return c; + } + void resize(size_t) { resize_call_count += 1; } +}; + +int resize_default_init_call_count = 0; + +// A mock string class whose only purpose is to track how many times its +// resize() and __resize_default_init() methods have been called. +struct resize_default_init_string { + size_t size() const { return 0; } + char& operator[](size_t) { + static char c = '\0'; + return c; + } + void resize(size_t) { resize_call_count += 1; } + void __resize_default_init(size_t) { resize_default_init_call_count += 1; } +}; + +TEST(ResizeUninit, WithAndWithout) { + resize_call_count = 0; + resize_default_init_call_count = 0; + { + resizable_string rs; + + EXPECT_EQ(resize_call_count, 0); + EXPECT_EQ(resize_default_init_call_count, 0); + EXPECT_FALSE( + absl::strings_internal::STLStringSupportsNontrashingResize(&rs)); + EXPECT_EQ(resize_call_count, 0); + EXPECT_EQ(resize_default_init_call_count, 0); + absl::strings_internal::STLStringResizeUninitialized(&rs, 237); + EXPECT_EQ(resize_call_count, 1); + EXPECT_EQ(resize_default_init_call_count, 0); + } + + resize_call_count = 0; + resize_default_init_call_count = 0; + { + resize_default_init_string rus; + + EXPECT_EQ(resize_call_count, 0); + EXPECT_EQ(resize_default_init_call_count, 0); + EXPECT_TRUE( + absl::strings_internal::STLStringSupportsNontrashingResize(&rus)); + EXPECT_EQ(resize_call_count, 0); + EXPECT_EQ(resize_default_init_call_count, 0); + absl::strings_internal::STLStringResizeUninitialized(&rus, 237); + EXPECT_EQ(resize_call_count, 0); + EXPECT_EQ(resize_default_init_call_count, 1); + } +} + +} // namespace |