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exact_math.sol
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pragma solidity ^0.4.16;
pragma experimental "v0.5.0";
pragma experimental "ABIEncoderV2";
import {ExactMath} from "../../src/math/ExactMath.sol";
import {STLTest} from "../STLTest.sol";
contract ExactMathTest is STLTest {
using ExactMath for *;
uint internal constant UINT_ZERO = 0;
uint internal constant UINT_ONE = 1;
uint internal constant UINT_TWO = 2;
uint internal constant UINT_ONES = ~uint(0);
int internal constant INT_ZERO = 0;
int internal constant INT_ONE = 1;
int internal constant INT_TWO = 2;
int internal constant INT_MINUS_ONE = -1;
int internal constant INT_MAX = int(2**255 - 1);
int internal constant INT_MIN = int(2**255);
}
contract TestMathExactAddUint is ExactMathTest {
uint internal constant TEST_VAL_1 = 937659378456935;
uint internal constant TEST_VAL_2 = 23457722001;
function testImpl() internal {
uint x = UINT_ZERO;
uint y = UINT_ZERO;
assert(x.exactAdd(y) == UINT_ZERO);
x = UINT_ZERO;
y = TEST_VAL_1;
assert(x.exactAdd(y) == y);
x = TEST_VAL_1;
y = UINT_ZERO;
assert(x.exactAdd(y) == x);
x = TEST_VAL_1;
y = TEST_VAL_2;
assert(x.exactAdd(y) == y.exactAdd(x));
assert(x.exactAdd(y) == x + y);
}
}
contract TestMathExactAddUintThrowsOverflow is ExactMathTest {
function testImpl() internal {
uint x = UINT_ONES;
uint y = UINT_ONE;
x.exactAdd(y);
}
}
contract TestMathExactSubUint is ExactMathTest {
uint internal constant TEST_VAL_1 = 937659378456935;
uint internal constant TEST_VAL_2 = 23457722001;
function testImpl() internal {
uint x = UINT_ZERO;
uint y = UINT_ZERO;
assert(x.exactSub(y) == UINT_ZERO);
x = TEST_VAL_1;
y = UINT_ZERO;
assert(x.exactSub(y) == x);
x = TEST_VAL_1;
y = TEST_VAL_2;
assert(x.exactSub(y) == x - y);
}
}
contract TestMathExactSubUintThrowsUnderflow is ExactMathTest {
function testImpl() internal {
uint x = 3;
uint y = 5;
x.exactSub(y);
}
}
contract TestMathExactMulUint is ExactMathTest {
uint internal constant TEST_VAL_1 = 937659378456935;
uint internal constant TEST_VAL_2 = 23457722001;
function testImpl() internal {
uint x = UINT_ZERO;
uint y = UINT_ZERO;
assert(x.exactMul(y) == UINT_ZERO);
x = UINT_ZERO;
y = TEST_VAL_1;
assert(x.exactMul(y) == UINT_ZERO);
x = TEST_VAL_1;
y = UINT_ZERO;
assert(x.exactMul(y) == UINT_ZERO);
x = UINT_ONE;
y = UINT_ONE;
assert(x.exactMul(y) == UINT_ONE);
x = UINT_ONE;
y = TEST_VAL_1;
assert(x.exactMul(y) == y);
x = TEST_VAL_1;
y = UINT_ONE;
assert(x.exactMul(y) == x);
x = TEST_VAL_1;
y = TEST_VAL_2;
assert(x.exactMul(y) == y.exactMul(x));
assert(x.exactMul(y) == x * y);
}
}
contract TestMathExactMulUintThrowsOverflow is ExactMathTest {
function testImpl() internal {
uint x = UINT_ONES;
uint y = UINT_TWO;
x.exactMul(y);
}
}
contract TestMathExactAddInt is ExactMathTest {
int internal constant TEST_VAL_1 = 937659378456935;
int internal constant TEST_VAL_2 = 23457722001;
int internal constant TEST_VAL_1N = -937659378456935;
int internal constant TEST_VAL_2N = -23457722001;
function testImpl() internal {
int x = INT_ZERO;
int y = INT_ZERO;
assert(x.exactAdd(y) == INT_ZERO);
x = INT_ZERO;
y = TEST_VAL_1;
assert(x.exactAdd(y) == y);
x = INT_ZERO;
y = TEST_VAL_1N;
assert(x.exactAdd(y) == y);
x = TEST_VAL_1;
y = INT_ZERO;
assert(x.exactAdd(y) == x);
x = TEST_VAL_1N;
y = INT_ZERO;
assert(x.exactAdd(y) == x);
x = TEST_VAL_1;
y = TEST_VAL_2;
assert(x.exactAdd(y) == y.exactAdd(x));
assert(x.exactAdd(y) == x + y);
x = TEST_VAL_1;
y = TEST_VAL_1N;
assert(x.exactAdd(y) == y.exactAdd(x));
assert(x.exactAdd(y) == INT_ZERO);
x = INT_MIN;
y = INT_MAX;
assert(x.exactAdd(y) == INT_MINUS_ONE);
}
}
contract TestMathExactAddIntThrowsOverflow is ExactMathTest {
function testImpl() internal {
int x = INT_MAX;
int y = INT_ONE;
x.exactAdd(y);
}
}
contract TestMathExactAddIntThrowsUnderflow is ExactMathTest {
function testImpl() internal {
int x = INT_MIN;
int y = INT_MINUS_ONE;
x.exactAdd(y);
}
}
contract TestMathExactSubInt is ExactMathTest {
int internal constant TEST_VAL_1 = 937659378456935;
int internal constant TEST_VAL_2 = 23457722001;
int internal constant TEST_VAL_1N = -937659378456935;
int internal constant TEST_VAL_2N = -23457722001;
function testImpl() internal {
int x = INT_ZERO;
int y = INT_ZERO;
assert(x.exactSub(y) == INT_ZERO);
x = TEST_VAL_1;
y = INT_ZERO;
assert(x.exactSub(y) == x);
x = TEST_VAL_1N;
y = INT_ZERO;
assert(x.exactSub(y) == x);
x = INT_ZERO;
y = TEST_VAL_1;
assert(x.exactSub(y) == -y);
x = INT_ZERO;
y = TEST_VAL_1N;
assert(x.exactSub(y) == -y);
x = TEST_VAL_1;
y = TEST_VAL_2;
assert(x.exactSub(y) == -y.exactSub(x));
assert(x.exactSub(y) == x - y);
x = TEST_VAL_1;
y = TEST_VAL_1N;
assert(x.exactSub(y) == x + x);
}
}
contract TestMathExactSubIntThrowsOverflow is ExactMathTest {
function testImpl() internal {
int x = INT_MAX;
int y = INT_MINUS_ONE;
x.exactSub(y);
}
}
contract TestMathExactSubIntThrowsUnderflow is ExactMathTest {
function testImpl() internal {
int x = INT_MIN;
int y = INT_ONE;
x.exactSub(y);
}
}
contract TestMathExactMulInt is ExactMathTest {
int internal constant TEST_VAL_1 = 937659378456935;
int internal constant TEST_VAL_2 = 23457722001;
int internal constant TEST_VAL_1N = -937659378456935;
int internal constant TEST_VAL_2N = -23457722001;
function testImpl() internal {
int x = INT_ZERO;
int y = INT_ZERO;
assert(x.exactMul(y) == INT_ZERO);
x = INT_ZERO;
y = TEST_VAL_1;
assert(x.exactMul(y) == INT_ZERO);
x = TEST_VAL_1;
y = INT_ZERO;
assert(x.exactMul(y) == INT_ZERO);
x = INT_ONE;
y = INT_ONE;
assert(x.exactMul(y) == INT_ONE);
x = INT_ONE;
y = TEST_VAL_1;
assert(x.exactMul(y) == y);
x = TEST_VAL_1;
y = INT_ONE;
assert(x.exactMul(y) == x);
x = TEST_VAL_1;
y = TEST_VAL_2;
assert(x.exactMul(y) == y.exactMul(x));
assert(x.exactMul(y) == x * y);
x = TEST_VAL_1;
y = INT_MINUS_ONE;
assert(x.exactMul(y) == TEST_VAL_1N);
x = TEST_VAL_1N;
y = INT_MINUS_ONE;
assert(x.exactMul(y) == TEST_VAL_1);
x = INT_MINUS_ONE;
y = TEST_VAL_1N;
assert(x.exactMul(y) == TEST_VAL_1);
}
}
contract TestMathExactMulIntThrowsOverflow is ExactMathTest {
function testImpl() internal {
int x = INT_MAX;
int y = INT_TWO;
x.exactMul(y);
}
}
contract TestMathExactMulIntThrowsUnderflow is ExactMathTest {
function testImpl() internal {
int x = INT_MIN;
int y = INT_TWO;
x.exactMul(y);
}
}
contract TestMathExactMulIntThrowsIntMinAndMinusOne is ExactMathTest {
function testImpl() internal {
int x = INT_MIN;
int y = INT_MINUS_ONE;
x.exactMul(y);
}
}
contract TestMathExactMulIntThrowsMinusOneAndIntMin is ExactMathTest {
function testImpl() internal {
int x = INT_MINUS_ONE;
int y = INT_MIN;
x.exactMul(y);
}
}
contract TestMathExactDivInt is ExactMathTest {
int internal constant TEST_VAL_1 = 937659378456935;
int internal constant TEST_VAL_2 = 23457722001;
int internal constant TEST_VAL_1N = -937659378456935;
int internal constant TEST_VAL_2N = -23457722001;
function testImpl() internal {
int x = INT_ONE;
int y = INT_ONE;
assert(x.exactDiv(y) == INT_ONE);
x = TEST_VAL_1;
y = INT_ONE;
assert(x.exactDiv(y) == TEST_VAL_1);
x = TEST_VAL_1;
y = INT_MINUS_ONE;
assert(x.exactDiv(y) == TEST_VAL_1N);
x = TEST_VAL_1;
y = TEST_VAL_2;
assert(x.exactDiv(y) == x / y);
x = TEST_VAL_2;
y = TEST_VAL_1;
assert(x.exactDiv(y) == INT_ZERO);
x = TEST_VAL_1N;
y = INT_MINUS_ONE;
assert(x.exactDiv(y) == TEST_VAL_1);
}
}
contract TestMathExactDivIntThrowsIntMinAndMinusOne is ExactMathTest {
function testImpl() internal {
int x = INT_MIN;
int y = INT_MINUS_ONE;
x.exactMul(y);
}
}