assertThrown

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.

void

assertThrown

(

T : Throwable = Exception

)

(

lazy E expression

string msg = null

string file = __FILE__

size_t line = __LINE__

)

Parameters

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

Throws

AssertError if the given Throwable is not thrown.

Examples

import core.exception : AssertError;
import std.string;

assertThrown!StringException(enforce!StringException(false, "Error!"));

//Exception is the default.
assertThrown(enforce!StringException(false, "Error!"));

assert(collectExceptionMsg!AssertError(assertThrown!StringException(
           enforce!StringException(true, "Error!"))) ==
       `assertThrown failed: No StringException was thrown.`);

assertThrown

Parameters

Throws

Examples

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