ARCHIVE/rippled
1
0
Fork 0
mirror of https://github.com/XRPLF/rippled.git synced 2025-11-26 05:55:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

AMM Add Number class and associated algorithms

Browse Source
This commit is contained in:
Howard Hinnant
2022-04-13 16:01:52 -04:00
committed by Elliot Lee
parent 31e7e5a56e
commit 0ee63b7c7b
4 changed files with 1050 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

143
src/test/basics/Number_test.cpp Normal file
View File

@@ -0,0 +1,143 @@
//------------------------------------------------------------------------------
/*
This file is part of rippled: https://github.com/ripple/rippled
Copyright (c) 2022 Ripple Labs Inc.
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
#include <ripple/basics/IOUAmount.h>
#include <ripple/basics/Number.h>
#include <ripple/beast/unit_test.h>
namespace ripple {
class Number_test : public beast::unit_test::suite
{
public:
void
testZero()
{
testcase("zero");
Number const z{0, 0};
BEAST_EXPECT(z.mantissa() == 0);
BEAST_EXPECT(z.exponent() == Number{}.exponent());
BEAST_EXPECT((z + z) == z);
BEAST_EXPECT((z - z) == z);
BEAST_EXPECT(z == -z);
}
void
test_add()
{
testcase("test_add");
Number x[]{
Number{1'000'000'000'000'000, -15},
Number{-1'000'000'000'000'000, -15},
Number{-1'000'000'000'000'000, -15},
Number{-6'555'555'555'555'555, -29}};
Number y[]{
Number{6'555'555'555'555'555, -29},
Number{-6'555'555'555'555'555, -29},
Number{6'555'555'555'555'555, -29},
Number{1'000'000'000'000'000, -15}};
Number z[]{
Number{1'000'000'000'000'066, -15},
Number{-1'000'000'000'000'066, -15},
Number{-9'999'999'999'999'344, -16},
Number{9'999'999'999'999'344, -16}};
for (unsigned i = 0; i < std::size(x); ++i)
{
BEAST_EXPECT(x[i] + y[i] == z[i]);
}
}
void
test_sub()
{
testcase("test_sub");
Number x[]{
Number{1'000'000'000'000'000, -15},
Number{6'555'555'555'555'555, -29}};
Number y[]{
Number{6'555'555'555'555'555, -29},
Number{1'000'000'000'000'000, -15}};
Number z[]{
Number{9'999'999'999'999'344, -16},
Number{-9'999'999'999'999'344, -16}};
for (unsigned i = 0; i < std::size(x); ++i)
{
BEAST_EXPECT(x[i] - y[i] == z[i]);
}
}
void
test_div()
{
testcase("test_div");
Number x[]{Number{1}, Number{1}, Number{0}};
Number y[]{Number{2}, Number{10}, Number{100}};
Number z[]{Number{5, -1}, Number{1, -1}, Number{0}};
for (unsigned i = 0; i < std::size(x); ++i)
{
BEAST_EXPECT(x[i] / y[i] == z[i]);
}
}
void
test_root()
{
testcase("test_root");
Number x[]{Number{2}, Number{2'000'000}, Number{2, -30}};
unsigned y[]{2, 2, 2};
Number z[]{
Number{1414213562373095, -15},
Number{1414213562373095, -12},
Number{1414213562373095, -30}};
for (unsigned i = 0; i < std::size(x); ++i)
{
BEAST_EXPECT(root(x[i], y[i]) == z[i]);
}
}
void
testConversions()
{
testcase("testConversions");
IOUAmount x{5, 6};
Number y = x;
BEAST_EXPECT((y == Number{5, 6}));
IOUAmount z{y};
BEAST_EXPECT(x == z);
}
void
run() override
{
testZero();
test_add();
test_sub();
test_div();
test_root();
testConversions();
}
};
BEAST_DEFINE_TESTSUITE(Number, ripple_basics, ripple);
} // namespace ripple