MakeFrame creates a handshake frame.

NewTestConn creates a new instance of testConn object.

NewTestConnWithReadLatency creates a new instance of testConn object that pauses for readLatency before any call to Read() returns.

NewUnresponsiveTestConn creates a new instance of unresponsiveTestConn object.

FakeHandshaker is a fake implementation of the ALTS handshaker service.

Stats is used to collect statistics about concurrent handshake calls.