assertNotThrown

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

Asserts that the given expression does not throw the given type of Throwable. If a Throwable of the given type is thrown, it is caught and does not escape assertNotThrown. Rather, an AssertError is thrown. However, any other Throwables will escape.

Parameters

`T`	The `Throwable` to test for.
`expression`	The expression to test.
`msg`	Optional message to output on test failure. If msg is empty, and the thrown exception has a non-empty msg field, the exception's msg field will be 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 thrown.

Returns

the result of expression.