This tests that NPP_DestroyStream is called with NPRES_NETWORK_ERR not called if a plug-in returns -1 its NPP_Write callback. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS plugin.returnNegativeOneFromWrite is true PASS newStreamCalled is false PASS newStreamCalled is true PASS reason is 1 TEST COMPLETE