你如何使用 `BeApproximately` 的值在循环的每次迭代中都会发生变化？

Question

说明

• 我正在迭代 2 个列表
• 我想比较列表中每个点的 2 个值
• 我希望该值在彼此的 0.1% 以内

完成重现问题的最小示例

var sheetRows = new List<float> { -24.0, 0.1, 10};
var loads= new List<float> { -24.0, 0.1, 10.05};
foreach ((var xl, var db) in sheetRows.Zip(loads, (n, w) => (n, w)))
{
   xl.Should().BeApproximately(db, db*0.001f);
}

预期行为：

通过

实际行为：

Expected xl to approximate -24F +/- -0.024F, but -24F differed by 0F.
   at FluentAssertions.Execution.LateBoundTestFramework.Throw(String message)
   at FluentAssertions.Execution.TestFrameworkProvider.Throw(String message)
   at FluentAssertions.Execution.DefaultAssertionStrategy.HandleFailure(String message)
   at FluentAssertions.Execution.AssertionScope.FailWith(Func`1 failReasonFunc)
   at FluentAssertions.Execution.AssertionScope.FailWith(Func`1 failReasonFunc)
   at FluentAssertions.Execution.AssertionScope.FailWith(String message, Object[] args)
   at FluentAssertions.NumericAssertionsExtensions.FailIfDifferenceOutsidePrecision[T](Boolean differenceWithinPrecision, NumericAssertions`1 parent, T expectedValue, T precision, T actualDifference, String because, Object[] becauseArgs)
   at FluentAssertions.NumericAssertionsExtensions.BeApproximately(NumericAssertions`1 parent, Single expectedValue, Single precision, String because, Object[] becauseArgs)
   at RoutingTests.UnitResponseModuleTests.U010_CheckTranslationAsync(Int64 sId, String sheetName, Int32 expected, Int32 excelRowCount) in C:\Users\sogscx\source\repos\Float\Compute\Test\RoutingTests\UnitResponseModuleTests.cs:line 480
   at NUnit.Framework.Internal.TaskAwaitAdapter.GenericAdapter`1.BlockUntilCompleted()

版本

• 您使用的是哪个版本的 Fluent 断言？

最新的

• 您的目标是哪个 .NET 运行时和版本？例如。 .NET 框架 4.6.1 或 .NET Core 2.1。

.NET Core 3.1 运行 NUnit

Answer 1

您为精度传递了一个负值。这很可能行不通。