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Add serialize float/double tests

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This commit is contained in:
Wladimir J. van der Laan 2015-01-14 11:07:13 +01:00
parent 9f4fac98c4
commit 62b30f09ac
1 changed files with 93 additions and 3 deletions
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96
src/test/serialize_tests.cpp
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@ -4,6 +4,7 @@
#include "serialize.h" #include "serialize.h"
#include "streams.h" #include "streams.h"
#include "hash.h"
#include <stdint.h> #include <stdint.h>
@ -26,15 +27,104 @@ BOOST_AUTO_TEST_CASE(sizes)
BOOST_CHECK_EQUAL(sizeof(uint64_t), GetSerializeSize(uint64_t(0), 0)); BOOST_CHECK_EQUAL(sizeof(uint64_t), GetSerializeSize(uint64_t(0), 0));
BOOST_CHECK_EQUAL(sizeof(float), GetSerializeSize(float(0), 0)); BOOST_CHECK_EQUAL(sizeof(float), GetSerializeSize(float(0), 0));
BOOST_CHECK_EQUAL(sizeof(double), GetSerializeSize(double(0), 0)); BOOST_CHECK_EQUAL(sizeof(double), GetSerializeSize(double(0), 0));
// Bool is serialized as char // Bool is serialized as char
BOOST_CHECK_EQUAL(sizeof(char), GetSerializeSize(bool(0), 0)); BOOST_CHECK_EQUAL(sizeof(char), GetSerializeSize(bool(0), 0));
// Sanity-check GetSerializeSize and c++ type matching
BOOST_CHECK_EQUAL(GetSerializeSize(char(0), 0), 1);
BOOST_CHECK_EQUAL(GetSerializeSize(int8_t(0), 0), 1);
BOOST_CHECK_EQUAL(GetSerializeSize(uint8_t(0), 0), 1);
BOOST_CHECK_EQUAL(GetSerializeSize(int16_t(0), 0), 2);
BOOST_CHECK_EQUAL(GetSerializeSize(uint16_t(0), 0), 2);
BOOST_CHECK_EQUAL(GetSerializeSize(int32_t(0), 0), 4);
BOOST_CHECK_EQUAL(GetSerializeSize(uint32_t(0), 0), 4);
BOOST_CHECK_EQUAL(GetSerializeSize(int64_t(0), 0), 8);
BOOST_CHECK_EQUAL(GetSerializeSize(uint64_t(0), 0), 8);
BOOST_CHECK_EQUAL(GetSerializeSize(float(0), 0), 4);
BOOST_CHECK_EQUAL(GetSerializeSize(double(0), 0), 8);
BOOST_CHECK_EQUAL(GetSerializeSize(bool(0), 0), 1);
} }
BOOST_AUTO_TEST_CASE(floats_conversion)
{
// Choose values that map unambigiously to binary floating point to avoid
// rounding issues at the compiler side.
BOOST_CHECK_EQUAL(ser_uint32_to_float(0x00000000), 0.0F);
BOOST_CHECK_EQUAL(ser_uint32_to_float(0x3f000000), 0.5F);
BOOST_CHECK_EQUAL(ser_uint32_to_float(0x3f800000), 1.0F);
BOOST_CHECK_EQUAL(ser_uint32_to_float(0x40000000), 2.0F);
BOOST_CHECK_EQUAL(ser_uint32_to_float(0x40800000), 4.0F);
BOOST_CHECK_EQUAL(ser_uint32_to_float(0x44444444), 785.066650390625F);
BOOST_CHECK_EQUAL(ser_float_to_uint32(0.0F), 0x00000000);
BOOST_CHECK_EQUAL(ser_float_to_uint32(0.5F), 0x3f000000);
BOOST_CHECK_EQUAL(ser_float_to_uint32(1.0F), 0x3f800000);
BOOST_CHECK_EQUAL(ser_float_to_uint32(2.0F), 0x40000000);
BOOST_CHECK_EQUAL(ser_float_to_uint32(4.0F), 0x40800000);
BOOST_CHECK_EQUAL(ser_float_to_uint32(785.066650390625F), 0x44444444);
}
BOOST_AUTO_TEST_CASE(doubles_conversion)
{
// Choose values that map unambigiously to binary floating point to avoid
// rounding issues at the compiler side.
BOOST_CHECK_EQUAL(ser_uint64_to_double(0x0000000000000000ULL), 0.0);
BOOST_CHECK_EQUAL(ser_uint64_to_double(0x3fe0000000000000ULL), 0.5);
BOOST_CHECK_EQUAL(ser_uint64_to_double(0x3ff0000000000000ULL), 1.0);
BOOST_CHECK_EQUAL(ser_uint64_to_double(0x4000000000000000ULL), 2.0);
BOOST_CHECK_EQUAL(ser_uint64_to_double(0x4010000000000000ULL), 4.0);
BOOST_CHECK_EQUAL(ser_uint64_to_double(0x4088888880000000ULL), 785.066650390625);
BOOST_CHECK_EQUAL(ser_double_to_uint64(0.0), 0x0000000000000000ULL);
BOOST_CHECK_EQUAL(ser_double_to_uint64(0.5), 0x3fe0000000000000ULL);
BOOST_CHECK_EQUAL(ser_double_to_uint64(1.0), 0x3ff0000000000000ULL);
BOOST_CHECK_EQUAL(ser_double_to_uint64(2.0), 0x4000000000000000ULL);
BOOST_CHECK_EQUAL(ser_double_to_uint64(4.0), 0x4010000000000000ULL);
BOOST_CHECK_EQUAL(ser_double_to_uint64(785.066650390625), 0x4088888880000000ULL);
}
/*
Python code to generate the below hashes:
def reversed_hex(x):
return binascii.hexlify(''.join(reversed(x)))
def dsha256(x):
return hashlib.sha256(hashlib.sha256(x).digest()).digest()
reversed_hex(dsha256(''.join(struct.pack('<f', x) for x in range(0,1000)))) == '8e8b4cf3e4df8b332057e3e23af42ebc663b61e0495d5e7e32d85099d7f3fe0c'
reversed_hex(dsha256(''.join(struct.pack('<d', x) for x in range(0,1000)))) == '43d0c82591953c4eafe114590d392676a01585d25b25d433557f0d7878b23f96'
*/
BOOST_AUTO_TEST_CASE(floats) BOOST_AUTO_TEST_CASE(floats)
{ {
// TODO ser_uint32_to_float, ser_uint64_to_double CDataStream ss(SER_DISK, 0);
// TODO ser_float_to_uint32, ser_double_to_uint64 // encode
for (int i = 0; i < 1000; i++) {
ss << float(i);
}
BOOST_CHECK(Hash(ss.begin(), ss.end()) == uint256S("8e8b4cf3e4df8b332057e3e23af42ebc663b61e0495d5e7e32d85099d7f3fe0c"));
// decode
for (int i = 0; i < 1000; i++) {
float j;
ss >> j;
BOOST_CHECK_MESSAGE(i == j, "decoded:" << j << " expected:" << i);
}
}
BOOST_AUTO_TEST_CASE(doubles)
{
CDataStream ss(SER_DISK, 0);
// encode
for (int i = 0; i < 1000; i++) {
ss << double(i);
}
BOOST_CHECK(Hash(ss.begin(), ss.end()) == uint256S("43d0c82591953c4eafe114590d392676a01585d25b25d433557f0d7878b23f96"));
// decode
for (int i = 0; i < 1000; i++) {
double j;
ss >> j;
BOOST_CHECK_MESSAGE(i == j, "decoded:" << j << " expected:" << i);
}
} }
BOOST_AUTO_TEST_CASE(varints) BOOST_AUTO_TEST_CASE(varints)