rspec/rules/S3431/csharp/rule.adoc

== Why is this an issue?

include::../description.adoc[]

=== Noncompliant code example

[source,csharp]
----
[TestMethod]
[ExpectedException(typeof(ArgumentNullException))]  // Noncompliant
public void TestNullArg()
{
  //...
}
----

=== Compliant solution

[source,csharp]
----
[TestMethod]
public void TestNullArg()
{
  bool callFailed = false;
  try
  {
    //...
  }
  catch (ArgumentNullException)
  {
    callFailed = true;
  }
  Assert.IsTrue(callFailed, "Expected call to MyMethod to fail with ArgumentNullException");
}
----

or

[source,csharp]
----
[TestMethod]
public void TestNullArg()
{
  Assert.ThrowsException<ArgumentNullException>(() => /*...*/);
}
----

include::../exceptions.adoc[]

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

=== Message

Replace the "ExpectedException" attribute with a throw assertion or a "try/catch" block.


=== Highlighting

ExpectedException attribute


'''
== Comments And Links
(visible only on this page)

include::../comments-and-links.adoc[]
endif::env-github,rspecator-view[]