tests: add wire protocol tests for pushkey Let's get the wire format of some pushkey requests in test-ssh-proto.t. Differential Revision: https://phab.mercurial-scm.org/D2466

debugcommands: support for sending "batch" requests Let's teach `hg debugwireproto` to send "batch" requests. The easiest way to implement this was as a pair of instructions to begin and end a batched operation. Otherwise, we would have to reinvent the parsing wheel or factor out the parsing code. To prove it works, we add a batched request to test-ssh-proto.t. Differential Revision: https://phab.mercurial-scm.org/D2408

debugcommands: allow sending of simple commands with debugwireproto Previously, we only had support for low-level "raw" operations. A goal of `hg debugwireproto` is to allow easily performing higher-level primitives, such as sending a wire protocol command and reading its response. We implement a "command" action that does just this. Currently, we only support simple commands (those without payloads). We have basic support for sending command arguments. We don't yet support sending dictionary arguments. This will be implemented later. To prove it works, we add tests to test-ssh-proto.t that send some "listkeys" commands. Note: we don't observe/report os.read() events because these may not be deterministic. We instead observe/report the read() and readline() operations on the bufferedinputpipe. These *should* be deterministic. Differential Revision: https://phab.mercurial-scm.org/D2406