1 /*
2 * Copyright 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <ftl/algorithm.h>
18 #include <ftl/small_map.h>
19 #include <ftl/static_vector.h>
20 #include <gtest/gtest.h>
21
22 #include <string_view>
23
24 namespace android::test {
25
26 // Keep in sync with example usage in header file.
TEST(Algorithm,FindIf)27 TEST(Algorithm, FindIf) {
28 using namespace std::string_view_literals;
29
30 const ftl::StaticVector vector = {"upside"sv, "down"sv, "cake"sv};
31 EXPECT_EQ(ftl::find_if(vector, [](const auto& str) { return str.front() == 'c'; }), "cake"sv);
32
33 const ftl::SmallMap map = ftl::init::map<int, ftl::StaticVector<std::string_view, 3>>(
34 12, "snow"sv, "cone"sv)(13, "tiramisu"sv)(14, "upside"sv, "down"sv, "cake"sv);
35
36 using Map = decltype(map);
37
38 EXPECT_EQ(14, ftl::find_if(map, [](const auto& pair) {
39 return pair.second.size() == 3;
40 }).transform(ftl::to_key<Map>));
41
42 const auto opt = ftl::find_if(map, [](const auto& pair) {
43 return pair.second.size() == 1;
44 }).transform(ftl::to_mapped_ref<Map>);
45
46 ASSERT_TRUE(opt);
47 EXPECT_EQ(opt->get(), ftl::StaticVector("tiramisu"sv));
48 }
49
TEST(Algorithm,StaticRef)50 TEST(Algorithm, StaticRef) {
51 using namespace std::string_view_literals;
52
53 const ftl::SmallMap map = ftl::init::map(13, "tiramisu"sv)(14, "upside-down cake"sv);
54 ASSERT_EQ("???"sv,
55 map.get(20).or_else(ftl::static_ref<std::string_view>([] { return "???"sv; }))->get());
56
57 using Map = decltype(map);
58
59 ASSERT_EQ("snow cone"sv,
60 ftl::find_if(map, [](const auto& pair) { return pair.second.front() == 's'; })
61 .transform(ftl::to_mapped_ref<Map>)
62 .or_else(ftl::static_ref<std::string_view>([] { return "snow cone"sv; }))
63 ->get());
64 }
65
66 } // namespace android::test
67