Workaround for incorrect assertSame / assertNotSame functionality in Testbox - for official fix see https://ortussolutions.atlassian.net/browse/TESTBOX-76

component.cfc

component
{

	function init()
	{
		Variables.System = createObject("java","java.lang.System");
	}


	this.isSameInstance = function ( any Expected , any Actual , string Message )
	{
		Arguments.Expected = System.identityHashCode(Arguments.Expected);
		Arguments.Actual   = System.identityHashCode(Arguments.Actual);

		if ( Arguments.Expected EQ Arguments.Actual )
			return;

		if ( NOT StructKeyExists(Arguments,'Message') )
			Arguments.Message = "Expected two objects to be same instance but received different HashCode values [#Arguments.Expected#,#Arguments.Actual#].";

		throw(type="TestBox.AssertionFailed",message=Arguments.Message);
	};


	this.isNotSameInstance = function ( any Expected , any Actual , string Message )
	{
		Arguments.Expected = Variables.System.identityHashCode(Arguments.Expected);
		Arguments.Actual   = Variables.System.identityHashCode(Arguments.Actual);

		if ( Arguments.Expected NEQ Arguments.Actual )
			return;

		if ( NOT StructKeyExists(Arguments,'Message') )
			Arguments.Message = "Expected two objects to be different instances but received same HashCode value [#Arguments.Expected#].";

		throw(type="TestBox.AssertionFailed",message=Arguments.Message);
	};


}

Usage Example for isSameInstance custom assertion

addAssertions( new path.to.below.Component() );

$assert.isSameInstance( ObjA , ObjB );