I want to test that my method throws argument exception on bad input.
// Here's the method signature:
public void Fobnicate(Foo foo, Bar bar, Baz baz) { ... }
// Validate Foo
[Test, ExpectedException(typeof(ArgumentNullException))]
public void FobnicateThrowsOnNullFoo()
{
dar.Fobnicate(null, bar, baz);
}
// Validate Bar
[Test, ExpectedException(typeof(ArgumentNullException))]
public void FobnicateThrowsOnNullBar()
{
dar.Fobnicate(foo, null, baz);
}
// Validate Baz
[Test, ExpectedException(typeof(ArgumentNullException))]
public void FobnicateThrowsOnNullFoo()
{
dar.Fobnicate(foo, bar, null);
}
Needless to say, that's pretty laborious just to test input. I spotted
MbUnit's [RowTest] attribute, and thought that would help. Then the
unit tests could become just 1 test:
[RowTest]
[Row(null, bar, baz, ExpectedException =
typeof(ArgumentNullException)]
[Row(foo, null, baz, ExpectedException =
typeof(ArgumentNullException)]
[Row(foo, bar, null, ExpectedException =
typeof(ArgumentNullException))]
public void FobnicateValidatesInput(Foo foo, Bar bar, Baz baz)
{
dar.Fobnicate(foo, bar, baz);
}
That would be brilliant, but it doesn't work because the C# compiler
must know attribute values at compile time. :-(
Is there an elegant way to validate several arguments like this using
MbUnit?
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