assertThrown

void assertThrown(T :  Throwable =  Exception,  E)(lazy  E expression,
                   string msg =  null,
                   string file =  __FILE__,
                   size_t line =  __LINE__)

Asserts that the given expression throws the given type of Throwable. The Throwable is caught and does not escape assertThrown. However, any other Throwables will escape, and if no Throwable of the given type is thrown, then an AssertError is thrown.

Parameters

`T`	The `Throwable` to test for.
`expression`	The expression to test.
`msg`	Optional message to output on test failure.
`file`	The file where the error occurred. Defaults to `__FILE__`.
`line`	The line where the error occurred. Defaults to `__LINE__`.

Throws

AssertError if the given Throwable is not thrown.