
PASS Test postMessage with no port. 
PASS Test postMessage with no arguments. 
PASS Test postMessage with no ports and empty array. 
PASS Test postMessage with two ports. 
PASS Test empty postMessage throws exception. 
PASS Test postMessage with null ports throws exception. 
PASS Test postMessage with incorrect ports throws exception 
PASS Test postMessage without sequence throws exception 
PASS Test postMessage on channel with previous failed postMessage calls.