How to catch PHP Warning in PHPUnit

Question

I am writing test cases and here is a question I have.

So say I am testing a simple function someClass::loadValue($value)

The normal test case

Answer 1

PHPUnit_Util_ErrorHandler::handleError() throws one of several exception types based on the error code:

• PHPUnit_Framework_Error_Notice for E_NOTICE, E_USER_NOTICE, and E_STRICT
• PHPUnit_Framework_Error_Warning for E_WARNING and E_USER_WARNING
• PHPUnit_Framework_Error for all others

You can catch and expect these as you would any other exception.

/**
 * @expectedException PHPUnit_Framework_Error_Warning
 */
function testNegativeNumberTriggersWarning() {
    $fixture = new someClass;
    $fixture->loadValue(-1);
}