C# FluentAssertions在断言失败后继续

Question

在FluentAssertions中断言失败后是否可以继续？我有一些断言，这些断言没有显示停止，应该只报告，但不会失败的测试运行。

[TestClass]
public class UnitTest1
{
    [TestMethod]
    public void TestMethod1()
    {
        using (var scope = new AssertionScope())
        {
            "This Should not Failed with an AssertException".Should().Be("Should Failed");
            "And this also not".Should().Be("Should Failed");
            "All should only be printed to the console".Should().NotBeEmpty();
        }
        "But the Test should continue".Should().Be("And Failed here with an AssertException");
    }
}

Answer 1

对于输出端，使用XUnit中的ITestOutputHelper -这是在XUnit 2.0+中获得测试日志输出的唯一方法。如果必须将检查作为断言编写，可以将自己的IAssertionStrategy实现作为构造函数参数提供给AssertionScope，并让它将断言失败消息发送到XUnit的测试输出，而不是抛出异常。

注意:要做到这一点，你至少需要FluentAssertions的v5.9.0。

public class XUnitTestOutputAssertionStrategy : IAssertionStrategy
{
    private readonly ITestOutputHelper output;
    private readonly List<string> failures = new List<string>();

    public XUnitTestOutputAssertionStrategy(ITestOutputHelper output)
    {
        this.output = output;
    }

    public void HandleFailure(string message)
    {
        failures.Add(message);
    }

    public IEnumerable<string> DiscardFailures()
    {
        var snapshot = failures.ToArray();
        failures.Clear();
        return snapshot;
    }

    public void ThrowIfAny(IDictionary<string, object> context)
    {
        if (!failures.Any()) return;

        var sb = new StringBuilder();
        sb.AppendLine(string.Join(Environment.NewLine, failures));
        foreach ((string key, object value) in context)
            sb.AppendFormat("\nWith {0}:\n{1}", key, value);

        output.WriteLine(sb.ToString());
    }

    public IEnumerable<string> FailureMessages => failures;
}

public class ContrivedTests
{
    private readonly ITestOutputHelper output;

    public ContrivedTests(ITestOutputHelper output)
    {
        this.output = output;
    }

    [Fact]
    public void WhenRunningTest_WithContrivedExample_ShouldOutputThenAssert()
    {
        using (new AssertionScope(new XUnitTestOutputAssertionStrategy(output)))
        {
            "Failures will log".Should().Contain("nope", "because we want to log this");
            "Success won't log".Should().StartWith("Success", "because we want to log this too, but it succeeded");
        }

        "This line will fail the test".Should().StartWith("Bottom Text", "because I pulled a sneaky on ya");
    }
}

Answer 2

您可以将断言包装在AssertionScope中，以在单个异常中捕获所有故障。另请参阅https://fluentassertions.com/introduction#assertion-scopes