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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Copyright Soramitsu Co., Ltd. 2016 All Rights Reserved. | ||
| 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 <gtest/gtest.h> | ||
|
|
||
| #include "rxcpp/rx.hpp" | ||
| namespace Rx { | ||
| using namespace rxcpp; | ||
| using namespace rxcpp::sources; | ||
| using namespace rxcpp::operators; | ||
| using namespace rxcpp::util; | ||
| } | ||
| using namespace Rx; | ||
|
|
||
| #include <regex> | ||
| #include <random> | ||
| using namespace std; | ||
| using namespace std::chrono; | ||
|
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||
| TEST(rxcppTest, usage_observable_test) { | ||
| random_device rd; // non-deterministic generator | ||
| mt19937 gen(rd()); | ||
| uniform_int_distribution<> dist(4, 18); | ||
|
|
||
| // for testing purposes, produce byte stream that from lines of text | ||
| auto bytes = range(0, 10) | | ||
| flat_map([&](int i){ | ||
| auto body = from((uint8_t)('A' + i)) | | ||
| repeat(dist(gen)) | | ||
| as_dynamic(); | ||
| auto delim = from((uint8_t)'\r'); | ||
| return from(body, delim) | concat(); | ||
| }) | | ||
| window(17) | | ||
| flat_map([](observable<uint8_t> w){ | ||
| return w | | ||
| reduce( | ||
| vector<uint8_t>(), | ||
| [](vector<uint8_t> v, uint8_t b){ | ||
| v.push_back(b); | ||
| return v; | ||
| }) | | ||
| as_dynamic(); | ||
| }) | | ||
| tap([](vector<uint8_t>& v){ | ||
| // print input packet of bytes | ||
| copy(v.begin(), v.end(), ostream_iterator<long>(cout, " ")); | ||
| cout << endl; | ||
| }); | ||
|
|
||
| // | ||
| // recover lines of text from byte stream | ||
| // | ||
|
|
||
| auto removespaces = [](string s){ | ||
| s.erase(remove_if(s.begin(), s.end(), ::isspace), s.end()); | ||
| return s; | ||
| }; | ||
|
|
||
| // create strings split on \r | ||
| auto strings = bytes | | ||
| concat_map([](vector<uint8_t> v){ | ||
| string s(v.begin(), v.end()); | ||
| regex delim(R"/(\r)/"); | ||
| cregex_token_iterator cursor(&s[0], &s[0] + s.size(), delim, {-1, 0}); | ||
| cregex_token_iterator end; | ||
| vector<string> splits(cursor, end); | ||
| return iterate(move(splits)); | ||
| }) | | ||
| filter([](const string& s){ | ||
| return !s.empty(); | ||
| }) | | ||
| publish() | | ||
| ref_count(); | ||
|
|
||
| // filter to last string in each line | ||
| auto closes = strings | | ||
| filter( | ||
| [](const string& s){ | ||
| return s.back() == '\r'; | ||
| }) | | ||
| Rx::map([](const string&){return 0;}); | ||
|
|
||
| // group strings by line | ||
| auto linewindows = strings | | ||
| window_toggle(closes | start_with(0), [=](int){return closes;}); | ||
|
|
||
| // reduce the strings for a line into one string | ||
| auto lines = linewindows | | ||
| flat_map([&](observable<string> w) { | ||
| return w | start_with<string>("") | sum() | Rx::map(removespaces); | ||
| }); | ||
|
|
||
| // print result | ||
| lines | | ||
| subscribe<string>(println(cout)); | ||
| } |