| // 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 <iosfwd> |
| |
| #include "arrow/testing/gtest_util.h" |
| #include "arrow/util/iterator.h" |
| |
| namespace arrow { |
| |
| struct TestInt { |
| TestInt(); |
| TestInt(int i); // NOLINT runtime/explicit |
| int value; |
| |
| bool operator==(const TestInt& other) const; |
| |
| friend std::ostream& operator<<(std::ostream& os, const TestInt& v); |
| }; |
| |
| template <> |
| struct IterationTraits<TestInt> { |
| static TestInt End() { return TestInt(); } |
| static bool IsEnd(const TestInt& val) { return val == IterationTraits<TestInt>::End(); } |
| }; |
| |
| struct TestStr { |
| TestStr(); |
| TestStr(const std::string& s); // NOLINT runtime/explicit |
| TestStr(const char* s); // NOLINT runtime/explicit |
| explicit TestStr(const TestInt& test_int); |
| std::string value; |
| |
| bool operator==(const TestStr& other) const; |
| |
| friend std::ostream& operator<<(std::ostream& os, const TestStr& v); |
| }; |
| |
| template <> |
| struct IterationTraits<TestStr> { |
| static TestStr End() { return TestStr(); } |
| static bool IsEnd(const TestStr& val) { return val == IterationTraits<TestStr>::End(); } |
| }; |
| |
| std::vector<TestInt> RangeVector(unsigned int max, unsigned int step = 1); |
| |
| template <typename T> |
| inline Iterator<T> VectorIt(std::vector<T> v) { |
| return MakeVectorIterator<T>(std::move(v)); |
| } |
| |
| template <typename T> |
| inline Iterator<T> PossiblySlowVectorIt(std::vector<T> v, bool slow = false) { |
| auto iterator = MakeVectorIterator<T>(std::move(v)); |
| if (slow) { |
| return MakeTransformedIterator<T, T>(std::move(iterator), |
| [](T item) -> Result<TransformFlow<T>> { |
| SleepABit(); |
| return TransformYield(item); |
| }); |
| } else { |
| return iterator; |
| } |
| } |
| |
| template <typename T> |
| inline void AssertIteratorExhausted(Iterator<T>& it) { |
| ASSERT_OK_AND_ASSIGN(T next, it.Next()); |
| ASSERT_TRUE(IsIterationEnd(next)); |
| } |
| |
| Transformer<TestInt, TestStr> MakeFilter(std::function<bool(TestInt&)> filter); |
| |
| } // namespace arrow |