1 | // Licensed to the Apache Software Foundation (ASF) under one |
2 | // or more contributor license agreements. See the NOTICE file |
3 | // distributed with this work for additional information |
4 | // regarding copyright ownership. The ASF licenses this file |
5 | // to you under the Apache License, Version 2.0 (the |
6 | // "License"); you may not use this file except in compliance |
7 | // with the License. You may obtain a copy of the License at |
8 | // |
9 | // http://www.apache.org/licenses/LICENSE-2.0 |
10 | // |
11 | // Unless required by applicable law or agreed to in writing, |
12 | // software distributed under the License is distributed on an |
13 | // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
14 | // KIND, either express or implied. See the License for the |
15 | // specific language governing permissions and limitations |
16 | // under the License. |
17 | |
18 | #include <algorithm> |
19 | #include <cstddef> |
20 | #include <cstdint> |
21 | #include <vector> |
22 | |
23 | #include <gtest/gtest.h> |
24 | |
25 | #include "arrow/test-util.h" |
26 | #include "arrow/util/lazy.h" |
27 | |
28 | namespace arrow { |
29 | |
30 | class TestLazyIter : public ::testing::Test { |
31 | public: |
32 | int64_t kSize = 1000; |
33 | void SetUp() { |
34 | randint(kSize, 0, 1000000, &source_); |
35 | target_.resize(kSize); |
36 | } |
37 | |
38 | protected: |
39 | std::vector<int> source_; |
40 | std::vector<int> target_; |
41 | }; |
42 | |
43 | TEST_F(TestLazyIter, TestIncrementCopy) { |
44 | auto add_one = [this](int64_t index) { return source_[index] + 1; }; |
45 | auto lazy_range = internal::MakeLazyRange(add_one, kSize); |
46 | std::copy(lazy_range.begin(), lazy_range.end(), target_.begin()); |
47 | |
48 | for (int64_t index = 0; index < kSize; ++index) { |
49 | ASSERT_EQ(source_[index] + 1, target_[index]); |
50 | } |
51 | } |
52 | |
53 | TEST_F(TestLazyIter, TestPostIncrementCopy) { |
54 | auto add_one = [this](int64_t index) { return source_[index] + 1; }; |
55 | auto lazy_range = internal::MakeLazyRange(add_one, kSize); |
56 | auto iter = lazy_range.begin(); |
57 | auto end = lazy_range.end(); |
58 | auto target_iter = target_.begin(); |
59 | |
60 | while (iter != end) { |
61 | *(target_iter++) = *(iter++); |
62 | } |
63 | |
64 | for (size_t index = 0, limit = source_.size(); index != limit; ++index) { |
65 | ASSERT_EQ(source_[index] + 1, target_[index]); |
66 | } |
67 | } |
68 | } // namespace arrow |
69 | |