1 // Copyright (c) 2020 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <span.h>
6 #include <test/fuzz/FuzzedDataProvider.h>
7 #include <test/fuzz/fuzz.h>
8 #include <test/fuzz/util.h>
9 
10 #include <cassert>
11 #include <cstddef>
12 #include <cstdint>
13 #include <string>
14 #include <vector>
15 
test_one_input(const std::vector<uint8_t> & buffer)16 void test_one_input(const std::vector<uint8_t>& buffer)
17 {
18     FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
19 
20     std::string str = fuzzed_data_provider.ConsumeBytesAsString(32);
21     const Span<const char> span{str};
22     (void)span.data();
23     (void)span.begin();
24     (void)span.end();
25     if (span.size() > 0) {
26         const std::ptrdiff_t idx = fuzzed_data_provider.ConsumeIntegralInRange<std::ptrdiff_t>(0U, span.size() - 1U);
27         (void)span.first(idx);
28         (void)span.last(idx);
29         (void)span.subspan(idx);
30         (void)span.subspan(idx, span.size() - idx);
31         (void)span[idx];
32     }
33 
34     std::string another_str = fuzzed_data_provider.ConsumeBytesAsString(32);
35     const Span<const char> another_span{another_str};
36     assert((span <= another_span) != (span > another_span));
37     assert((span == another_span) != (span != another_span));
38     assert((span >= another_span) != (span < another_span));
39 }
40