| 73 | } |
| 74 | |
| 75 | Field QueryFuzzer::fuzzField(Field field) |
| 76 | { |
| 77 | const auto type = field.getType(); |
| 78 | |
| 79 | int type_index = -1; |
| 80 | |
| 81 | if (type == Field::Types::Int64 |
| 82 | || type == Field::Types::UInt64) |
| 83 | { |
| 84 | type_index = 0; |
| 85 | } |
| 86 | else if (type == Field::Types::Float64) |
| 87 | { |
| 88 | type_index = 1; |
| 89 | } |
| 90 | else if (type == Field::Types::Decimal32 |
| 91 | || type == Field::Types::Decimal64 |
| 92 | || type == Field::Types::Decimal128) |
| 93 | { |
| 94 | type_index = 2; |
| 95 | } |
| 96 | |
| 97 | if (fuzz_rand() % 20 == 0) |
| 98 | { |
| 99 | return Null{}; |
| 100 | } |
| 101 | |
| 102 | if (type_index >= 0) |
| 103 | { |
| 104 | if (fuzz_rand() % 20 == 0) |
| 105 | { |
| 106 | // Change type sometimes, but not often, because it mostly leads to |
| 107 | // boring errors. |
| 108 | type_index = fuzz_rand() % 3; |
| 109 | } |
| 110 | return getRandomField(type_index); |
| 111 | } |
| 112 | |
| 113 | if (type == Field::Types::String) |
| 114 | { |
| 115 | auto & str = field.get<std::string>(); |
| 116 | UInt64 action = fuzz_rand() % 10; |
| 117 | switch (action) |
| 118 | { |
| 119 | case 0: |
| 120 | str = ""; |
| 121 | break; |
| 122 | case 1: |
| 123 | str = str + str; |
| 124 | break; |
| 125 | case 2: |
| 126 | str = str + str + str + str; |
| 127 | break; |
| 128 | case 4: |
| 129 | if (!str.empty()) |
| 130 | { |
| 131 | str[fuzz_rand() % str.size()] = '\0'; |
| 132 | } |