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Variable-length integers: bytes are a MSB base-128 encoding of the number. The high bit in each byte signifies whether another digit follows. To make the encoding is one-to-one, one is subtracted from all but the last digit. Thus, the byte sequence a[] with length len, where all but the last byte has bit 128 set, encodes the number: (a[len-1] & 0x7F) + sum(i=1..len-1, 128^i*((a[len-i-1] & 0x7F)+1)) Properties: * Very small (0-127: 1 byte, 128-16511: 2 bytes, 16512-2113663: 3 bytes) * Every integer has exactly one encoding * Encoding does not depend on size of original integer type |
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| .. | ||
| data | ||
| accounting_tests.cpp | ||
| allocator_tests.cpp | ||
| base32_tests.cpp | ||
| base58_tests.cpp | ||
| base64_tests.cpp | ||
| bignum_tests.cpp | ||
| canonical_tests.cpp | ||
| Checkpoints_tests.cpp | ||
| DoS_tests.cpp | ||
| getarg_tests.cpp | ||
| key_tests.cpp | ||
| miner_tests.cpp | ||
| mruset_tests.cpp | ||
| multisig_tests.cpp | ||
| netbase_tests.cpp | ||
| README | ||
| rpc_tests.cpp | ||
| script_P2SH_tests.cpp | ||
| script_tests.cpp | ||
| serialize_tests.cpp | ||
| sigopcount_tests.cpp | ||
| test_bitcoin.cpp | ||
| transaction_tests.cpp | ||
| uint160_tests.cpp | ||
| uint256_tests.cpp | ||
| util_tests.cpp | ||
| wallet_tests.cpp | ||
The sources in this directory are unit test cases. Boost includes a unit testing framework, and since bitcoin already uses boost, it makes sense to simply use this framework rather than require developers to configure some other framework (we want as few impediments to creating unit tests as possible). The build system is setup to compile an executable called "test_bitcoin" that runs all of the unit tests. The main source file is called test_bitcoin.cpp, which simply includes other files that contain the actual unit tests (outside of a couple required preprocessor directives). The pattern is to create one test file for each class or source file for which you want to create unit tests. The file naming convention is "<source_filename>_tests.cpp" and such files should wrap their tests in a test suite called "<source_filename>_tests". For an examples of this pattern, examine uint160_tests.cpp and uint256_tests.cpp. For further reading, I found the following website to be helpful in explaining how the boost unit test framework works: http://www.alittlemadness.com/2009/03/31/c-unit-testing-with-boosttest/