如何将动态对象传递给NUnit TestCase函数？

Question

我正在编写一个数据密集型应用程序.我有以下测试.他们工作,但他们是多余的.

[Test]
public void DoSanityCheck_WithCountEqualsZeroAndHouseGrossIsGreater_InMerchantAggregateTotals_SetsWarning()
{
    report.Merchants[5461324658456716].AggregateTotals.ItemCount = 0;
    report.Merchants[5461324658456716].AggregateTotals._volume = 0;
    report.Merchants[5461324658456716].AggregateTotals._houseGross = 1;

    report.DoSanityCheck();

    Assert.IsTrue(report.FishyFlag);
    Assert.That(report.DataWarnings.Where(x=> x is Reports.WarningObjects.ImbalancedVariables && x.mid == 5461324658456716 && x.lineitem == "AggregateTotals").Count() > 0);
}
[Test]
public void DoSanityCheck_WithCountEqualsZeroAndHouseGrossIsGreater_InAggregateTotals_SetsWarning()
{
    report.AggregateTotals.ItemCount = 0;
    report.AggregateTotals._volume = 0;
    report.AggregateTotals._houseGross = 1;

    report.DoSanityCheck();

    Assert.IsTrue(report.FishyFlag);
    Assert.That(report.DataWarnings.Where(x=> x is Reports.WarningObjects.ImbalancedVariables && x.mid == null && x.lineitem == "AggregateTotals").Count() > 0);
}
[Test]
public void DoSanityCheck_WithCountEqualsZeroAndHouseGrossIsGreater_InAggregateTotalsLineItem_SetsWarning()
{
    report.AggregateTotals.LineItem["WirelessPerItem"].ItemCount = 0;
    report.AggregateTotals.LineItem["WirelessPerItem"]._volume = 0;
    report.AggregateTotals.LineItem["WirelessPerItem"]._houseGross = 1;

    report.DoSanityCheck();

    Assert.IsTrue(report.FishyFlag);
    Assert.That(report.DataWarnings.Where(x=> x is Reports.WarningObjects.ImbalancedVariables && x.mid == null && x.lineitem == "WirelessPerItem").Count() > 0);
}

在开始时修改相同的属性,就像不同容器对象的子项一样,并且断言中的一些值在最后更改.我需要写几十个,检查不同的属性.所以我想参数化测试.诀窍是将容器对象作为参数传递给测试.容器对象在测试夹具SetUp中实例化.

我想要实现的将是这样的:

[TestCase(report.AggregateTotals.LineItem["WirelessPerItem"], 0, "WirelessPerItem")]
[TestCase(report.AggregateTotals, 4268435971532164, "AggregateTotals")]
[TestCase(report.Merchants[5461324658456716].AggregateTotals, 5461324658456716, "WirelessPerItem")]
[TestCase(report.Merchants[4268435971532164].LineItem["EBTPerItem"], 4268435971532164, "EBTPerItem")]
public void DoSanityCheck_WithCountEqualsZeroAndHouseGrossIsGreater_TestCase_SetsWarning(object container, long mid, string field)
{
    container.ItemCount = 0;
    container._volume = 0;
    container._houseGross = 1;

    report.DoSanityCheck();

    Assert.IsTrue(report.FishyFlag);
    Assert.That(report.DataWarnings.Where(x=> x is Reports.WarningObjects.ImbalancedVariables && x.mid == mid && x.lineitem == field).Count() > 0);
}

但这不起作用,我不确定如何使其工作,或者是否可能.

Answer 1

我跟踪了它.我无法通过TestCase将实例化对象传递给测试,因为属性严格用于静态元数据.但是NUnit团队有一个解决方案TestCaseSource.NUnit列表中回答问题的帖子就在这里.

这是我的解决方案现在的样子:

public IEnumerable<TestCaseData> CountEqualsZeroAndHouseGrossIsGreaterTestCases
{
    get
    {
        Setup();
        yield return new TestCaseData(report, report.Merchants[4268435971532164].LineItem["EBTPerItem"], 4268435971532164, "EBTPerItem").SetName("ReportMerchantsLineItem");
        yield return new TestCaseData(report, report.Merchants[5461324658456716].AggregateTotals, 5461324658456716, "WirelessPerItem").SetName("ReportMerchantsAggregateTotals");
        yield return new TestCaseData(report, report.AggregateTotals, null, "AggregateTotals").SetName("ReportAggregateTotals");
        yield return new TestCaseData(report, report.AggregateTotals.LineItem["WirelessPerItem"], null, "WirelessPerItem").SetName("ReportAggregateTotalsLineItem");
    }
}
[TestCaseSource("CountEqualsZeroAndHouseGrossIsGreaterTestCases")]
public void DoSanityCheck_WithCountEqualsZeroAndHouseGrossIsGreater_TestCase_SetsWarning(Reports.ResidualsReport report, Reports.LineItemObject container, long? mid, string field)
{
    container.ItemCount = 0;
    container._volume = 0;
    container._houseGross = 1;

    report.DoSanityCheck();

    Assert.IsTrue(report.FishyFlag);
    Assert.That(report.DataWarnings.Where(x=> x is Reports.WarningObjects.ImbalancedVariables && x.mid == mid && x.lineitem == field).Count() > 0);
}

不像我希望的那么漂亮,不那么容易阅读.但它确实成功地减少了代码重复,这应该使事情更容易维护和修复.

Answer 2

我传递有时会解析的字符串,认为它读得很好,例如:

[TestCase("15°", "-10°", 25, typeof(Degrees))]
[TestCase("-10°", "15°", -25, typeof(Degrees))]
[TestCase("-10°", "0°", -10, typeof(Degrees))]
[TestCase("-90°", "1.5707 rad", -3.1414, typeof(Radians))]
[TestCase("1.5707 rad", "-90°", 3.1414, typeof(Radians))]
[TestCase("1.5707 rad", "1.5707 rad", 0, typeof(Radians))]
public void SubtractionTest(string lvs, string rvs, double ev, Type et)
{
    var lv = Angle.Parse(lvs);
    var rv = Angle.Parse(rvs);
    var diff = lv - rv;
    Assert.AreEqual(ev, diff.Value, 1e-3);
    Assert.AreEqual(et, diff.Unit.GetType());
}