| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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 |
| * |
| * http://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 "common/libs/auto_resources/auto_resources.h" |
| |
| #include <stdio.h> |
| |
| #include <gtest/gtest.h> |
| #include <gmock/gmock.h> |
| |
| using ::testing::StrEq; |
| |
| namespace test { |
| static constexpr size_t kImmutableReserveSize = |
| AutoFreeBuffer::kAutoBufferShrinkReserveThreshold; |
| |
| class AutoFreeBufferTest : public ::testing::Test { |
| public: |
| AutoFreeBufferTest() = default; |
| ~AutoFreeBufferTest() override = default; |
| |
| void SetUp() override {} |
| void TearDown() override {} |
| |
| protected: |
| AutoFreeBuffer buffer_; |
| }; |
| |
| TEST_F(AutoFreeBufferTest, ShrinkingSmallReservationsDoesNotRealloc) { |
| |
| buffer_.Reserve(kImmutableReserveSize); |
| const void* const data = buffer_.data(); |
| |
| EXPECT_EQ(0u, buffer_.size()); |
| EXPECT_EQ(kImmutableReserveSize, buffer_.reserve_size()); |
| EXPECT_NE(nullptr, data); |
| |
| buffer_.Resize(kImmutableReserveSize); |
| EXPECT_EQ(kImmutableReserveSize, buffer_.size()); |
| EXPECT_EQ(data, buffer_.data()); |
| |
| // Reduce size of buffer. |
| buffer_.Reserve(kImmutableReserveSize / 2); |
| EXPECT_EQ(kImmutableReserveSize, buffer_.reserve_size()); |
| EXPECT_EQ(kImmutableReserveSize / 2, buffer_.size()); |
| EXPECT_EQ(data, buffer_.data()); |
| |
| buffer_.Clear(); |
| |
| EXPECT_EQ(0u, buffer_.size()); |
| EXPECT_EQ(kImmutableReserveSize, buffer_.reserve_size()); |
| EXPECT_EQ(data, buffer_.data()); |
| } |
| |
| TEST_F(AutoFreeBufferTest, ShrinkingLargeReservationDoesRealloc) { |
| buffer_.Reserve(kImmutableReserveSize + 1); |
| |
| EXPECT_EQ(0u, buffer_.size()); |
| EXPECT_EQ(kImmutableReserveSize + 1, buffer_.reserve_size()); |
| |
| buffer_.Reserve(kImmutableReserveSize); |
| |
| EXPECT_EQ(0u, buffer_.size()); |
| EXPECT_EQ(kImmutableReserveSize, buffer_.reserve_size()); |
| // Note: realloc may re-use current memory pointer, so testing data pointer |
| // makes no sense. |
| } |
| |
| TEST_F(AutoFreeBufferTest, ResizeClearsMemory) { |
| constexpr char kTruncWords[] = "This string"; |
| constexpr char kLastWords[] = "will be truncated to first two words."; |
| constexpr char kFullText[] = |
| "This string will be truncated to first two words."; |
| // Ignore padding \0. |
| constexpr size_t kTruncLength = sizeof(kTruncWords) - 1; |
| |
| buffer_.SetToString(kFullText); |
| |
| // Note: this call treats buffer as raw data, so no padding happens yet. |
| buffer_.Resize(kTruncLength); |
| EXPECT_THAT(buffer_.data(), StrEq(kFullText)); |
| |
| buffer_.Resize(kTruncLength + 1); |
| EXPECT_THAT(buffer_.data(), StrEq(kTruncWords)); |
| |
| // Note: we're accessing buffer out of size() bounds, but still within |
| // reserve_size() bounds. |
| // This confirms that only 1 byte of data has been appended. |
| EXPECT_THAT(&buffer_.data()[sizeof(kTruncWords)], StrEq(kLastWords)); |
| } |
| |
| TEST_F(AutoFreeBufferTest, PrintFTest) { |
| constexpr char kFormatString[] = "Printf %s %d %03d %02x Test."; |
| constexpr char kParam1[] = "string"; |
| constexpr int kParam2 = 1234; |
| constexpr int kParam3 = 7; |
| constexpr int kParam4 = 0x42; |
| |
| char temp_buffer[1024]; |
| size_t vsize = snprintf(&temp_buffer[0], sizeof(temp_buffer), |
| kFormatString, kParam1, kParam2, kParam3, kParam4); |
| |
| // Test 1: no reservation => allocate buffer. |
| EXPECT_EQ(vsize, |
| buffer_.PrintF(kFormatString, kParam1, kParam2, kParam3, kParam4)); |
| // Check for size + null termination. |
| EXPECT_EQ(vsize + 1, buffer_.size()); |
| EXPECT_THAT(buffer_.data(), StrEq(temp_buffer)); |
| |
| size_t reservation = buffer_.reserve_size(); |
| |
| buffer_.Clear(); |
| |
| // Test 2: buffer reserved: just print and return. |
| EXPECT_EQ(vsize, |
| buffer_.PrintF(kFormatString, kParam1, kParam2, kParam3, kParam4)); |
| // Check for size + null termination. |
| EXPECT_EQ(vsize + 1, buffer_.size()); |
| EXPECT_THAT(buffer_.data(), StrEq(temp_buffer)); |
| EXPECT_EQ(reservation, buffer_.reserve_size()); |
| } |
| |
| } // namespace test |