Foundry Book

assertApproxEqAbs

签名

function assertApproxEqAbs(uint256 left, uint256 right, uint256 maxDelta) internal;

function assertApproxEqAbs(uint256 left, uint256 right, uint256 maxDelta, string memory err) internal;

function assertApproxEqAbs(int256 left, int256 right, uint256 maxDelta) internal;

function assertApproxEqAbs(int256 left, int256 right, uint256 maxDelta, string memory err) internal;

描述

断言 left 与 right 在绝对值上近似相等，允许有一个 delta。

可选地在回退字符串中包含错误消息。

例子

function testFail() external {
    uint256 a = 100;
    uint256 b = 200;

    assertApproxEqAbs(a, b, 90);
}

[PASS] testFail() (gas: 23169)
Logs:
  Error: a ~= b not satisfied [uint]
    Expected: 200
      Actual: 100
   Max Delta: 90
       Delta: 100

参见

• assertApproxEqAbsDecimal
• assertApproxEqRel