| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 <algorithm> |
| #include <cstring> |
| #include <memory> |
| |
| #include <gtest/gtest.h> |
| |
| #include "kudu/util/faststring.h" |
| #include "kudu/util/random.h" |
| #include "kudu/util/random_util.h" |
| #include "kudu/util/test_util.h" |
| |
| namespace kudu { |
| class FaststringTest : public KuduTest {}; |
| |
| TEST_F(FaststringTest, TestShrinkToFit_Empty) { |
| faststring s; |
| s.shrink_to_fit(); |
| ASSERT_EQ(faststring::kInitialCapacity, s.capacity()); |
| } |
| |
| // Test that, if the string contents is shorter than the initial capacity |
| // of the faststring, shrink_to_fit() leaves the string in the built-in |
| // array. |
| TEST_F(FaststringTest, TestShrinkToFit_SmallerThanInitialCapacity) { |
| faststring s; |
| s.append("hello"); |
| s.shrink_to_fit(); |
| ASSERT_EQ(faststring::kInitialCapacity, s.capacity()); |
| } |
| |
| TEST_F(FaststringTest, TestShrinkToFit_Random) { |
| Random r(GetRandomSeed32()); |
| int kMaxSize = faststring::kInitialCapacity * 2; |
| std::unique_ptr<char[]> random_bytes(new char[kMaxSize]); |
| RandomString(random_bytes.get(), kMaxSize, &r); |
| |
| faststring s; |
| for (int i = 0; i < 100; i++) { |
| int new_size = r.Uniform(kMaxSize); |
| s.resize(new_size); |
| memcpy(s.data(), random_bytes.get(), new_size); |
| s.shrink_to_fit(); |
| ASSERT_EQ(0, memcmp(s.data(), random_bytes.get(), new_size)); |
| ASSERT_EQ(std::max<int>(faststring::kInitialCapacity, new_size), s.capacity()); |
| } |
| } |
| |
| } // namespace kudu |