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256 lines
10 KiB
EmacsLisp
256 lines
10 KiB
EmacsLisp
;;; jsonrpc-tests.el --- tests for jsonrpc.el -*- lexical-binding: t; -*-
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;; Copyright (C) 2018-2020 Free Software Foundation, Inc.
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;; Author: João Távora <joaotavora@gmail.com>
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;; Keywords: tests
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; About "deferred" tests, `jsonrpc--test-client' has a flag that we
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;; test in its `jsonrpc-connection-ready-p' API method. It holds any
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;; `jsonrpc-request's and `jsonrpc-async-request's explicitly passed
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;; `:deferred'. After clearing the flag, the held requests are
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;; actually sent to the server in the next opportunity (when receiving
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;; or sending something to the server).
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;;; Code:
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(require 'ert)
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(require 'jsonrpc)
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(require 'eieio)
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(defclass jsonrpc--test-endpoint (jsonrpc-process-connection)
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((scp :accessor jsonrpc--shutdown-complete-p)))
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(defclass jsonrpc--test-client (jsonrpc--test-endpoint)
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((hold-deferred :initform t :accessor jsonrpc--hold-deferred)))
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(defun jsonrpc--call-with-emacsrpc-fixture (fn)
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"Do work for `jsonrpc--with-emacsrpc-fixture'. Call FN."
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(let* (listen-server endpoint)
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(unwind-protect
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(progn
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(setq listen-server
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(make-network-process
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:name "Emacs RPC server" :server t :host "localhost"
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:service (if (version<= emacs-version "26.1")
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44444
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;; 26.1 can automatically find ports if
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;; one passes 0 here.
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0)
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:log (lambda (listen-server client _message)
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(push
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(make-instance
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'jsonrpc--test-endpoint
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:name (process-name client)
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:process client
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:request-dispatcher
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(lambda (_endpoint method params)
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(unless (memq method '(+ - * / vconcat append
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sit-for ignore))
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(signal 'jsonrpc-error
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'((jsonrpc-error-message
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. "Sorry, this isn't allowed")
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(jsonrpc-error-code . -32601))))
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(apply method (append params nil)))
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:on-shutdown
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(lambda (conn)
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(setf (jsonrpc--shutdown-complete-p conn) t)))
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(process-get listen-server 'handlers)))))
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(setq endpoint
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(make-instance
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'jsonrpc--test-client
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"Emacs RPC client"
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:process
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(open-network-stream "JSONRPC test tcp endpoint"
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nil "localhost"
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(process-contact listen-server
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:service))
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:on-shutdown
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(lambda (conn)
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(setf (jsonrpc--shutdown-complete-p conn) t))))
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(funcall fn endpoint))
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(unwind-protect
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(when endpoint
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(kill-buffer (jsonrpc--events-buffer endpoint))
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(jsonrpc-shutdown endpoint))
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(when listen-server
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(cl-loop do (delete-process listen-server)
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while (progn (accept-process-output nil 0.1)
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(process-live-p listen-server))
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do (jsonrpc--message
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"test listen-server is still running, waiting"))
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(cl-loop for handler in (process-get listen-server 'handlers)
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do (ignore-errors (jsonrpc-shutdown handler)))
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(mapc #'kill-buffer
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(mapcar #'jsonrpc--events-buffer
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(process-get listen-server 'handlers))))))))
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(cl-defmacro jsonrpc--with-emacsrpc-fixture ((endpoint-sym) &body body)
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`(jsonrpc--call-with-emacsrpc-fixture (lambda (,endpoint-sym) ,@body)))
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(ert-deftest returns-3 ()
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"A basic test for adding two numbers in our test RPC."
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(jsonrpc--with-emacsrpc-fixture (conn)
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(should (= 3 (jsonrpc-request conn '+ [1 2])))))
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(ert-deftest errors-with--32601 ()
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"Errors with -32601"
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(jsonrpc--with-emacsrpc-fixture (conn)
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(condition-case err
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(progn
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(jsonrpc-request conn 'delete-directory "~/tmp")
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(ert-fail "A `jsonrpc-error' should have been signaled!"))
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(jsonrpc-error
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(should (= -32601 (cdr (assoc 'jsonrpc-error-code (cdr err)))))))))
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(ert-deftest signals-an--32603-JSONRPC-error ()
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"Signals an -32603 JSONRPC error."
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(jsonrpc--with-emacsrpc-fixture (conn)
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(condition-case err
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(progn
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(jsonrpc-request conn '+ ["a" 2])
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(ert-fail "A `jsonrpc-error' should have been signaled!"))
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(jsonrpc-error
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(should (= -32603 (cdr (assoc 'jsonrpc-error-code (cdr err)))))))))
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(ert-deftest times-out ()
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"Request for 3-sec sit-for with 1-sec timeout times out."
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(jsonrpc--with-emacsrpc-fixture (conn)
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(should-error
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(jsonrpc-request conn 'sit-for [3] :timeout 1))))
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(ert-deftest doesnt-time-out ()
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:tags '(:expensive-test)
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"Request for 1-sec sit-for with 2-sec timeout succeeds."
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(jsonrpc--with-emacsrpc-fixture (conn)
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(jsonrpc-request conn 'sit-for [1] :timeout 2)))
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(ert-deftest stretching-it-but-works ()
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"Vector of numbers or vector of vector of numbers are serialized."
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(jsonrpc--with-emacsrpc-fixture (conn)
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;; (vconcat [1 2 3] [3 4 5]) => [1 2 3 3 4 5] which can be
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;; serialized.
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(should (equal
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[1 2 3 3 4 5]
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(jsonrpc-request conn 'vconcat [[1 2 3] [3 4 5]])))))
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(ert-deftest json-el-cant-serialize-this ()
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"Can't serialize a response that is half-vector/half-list."
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(jsonrpc--with-emacsrpc-fixture (conn)
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(should-error
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;; (append [1 2 3] [3 4 5]) => (1 2 3 . [3 4 5]), which can't be
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;; serialized
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(jsonrpc-request conn 'append [[1 2 3] [3 4 5]]))))
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(cl-defmethod jsonrpc-connection-ready-p
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((conn jsonrpc--test-client) what)
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(and (cl-call-next-method)
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(or (not (string-match "deferred" what))
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(not (jsonrpc--hold-deferred conn)))))
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(ert-deftest deferred-action-toolate ()
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:tags '(:expensive-test)
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"Deferred request fails because no one clears the flag."
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(jsonrpc--with-emacsrpc-fixture (conn)
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(should-error
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(jsonrpc-request conn '+ [1 2]
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:deferred "deferred-testing" :timeout 0.5)
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:type 'jsonrpc-error)
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(should
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(= 3 (jsonrpc-request conn '+ [1 2]
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:timeout 0.5)))))
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(ert-deftest deferred-action-intime ()
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:tags '(:expensive-test)
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"Deferred request barely makes it after event clears a flag."
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;; Send an async request, which returns immediately. However the
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;; success fun which sets the flag only runs after some time.
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(jsonrpc--with-emacsrpc-fixture (conn)
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(jsonrpc-async-request conn
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'sit-for [0.5]
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:success-fn
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(lambda (_result)
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(setf (jsonrpc--hold-deferred conn) nil)))
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;; Now wait for an answer to this request, which should be sent as
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;; soon as the previous one is answered.
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(should
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(= 3 (jsonrpc-request conn '+ [1 2]
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:deferred "deferred"
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:timeout 1)))))
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(ert-deftest deferred-action-complex-tests ()
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:tags '(:expensive-test)
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"Test a more complex situation with deferred requests."
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(jsonrpc--with-emacsrpc-fixture (conn)
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(let (n-deferred-1
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n-deferred-2
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second-deferred-went-through-p)
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;; This returns immediately
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(jsonrpc-async-request
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conn
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'sit-for [0.1]
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:success-fn
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(lambda (_result)
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;; this only gets runs after the "first deferred" is stashed.
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(setq n-deferred-1
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(hash-table-count (jsonrpc--deferred-actions conn)))))
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(should-error
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;; This stashes the request and waits. It will error because
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;; no-one clears the "hold deferred" flag.
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(jsonrpc-request conn 'ignore ["first deferred"]
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:deferred "first deferred"
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:timeout 0.5)
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:type 'jsonrpc-error)
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;; The error means the deferred actions stash is now empty
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(should (zerop (hash-table-count (jsonrpc--deferred-actions conn))))
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;; Again, this returns immediately.
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(jsonrpc-async-request
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conn
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'sit-for [0.1]
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:success-fn
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(lambda (_result)
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;; This gets run while "third deferred" below is waiting for
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;; a reply. Notice that we clear the flag in time here.
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(setq n-deferred-2 (hash-table-count (jsonrpc--deferred-actions conn)))
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(setf (jsonrpc--hold-deferred conn) nil)))
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;; This again stashes a request and returns immediately.
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(jsonrpc-async-request conn 'ignore ["second deferred"]
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:deferred "second deferred"
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:timeout 1
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:success-fn
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(lambda (_result)
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(setq second-deferred-went-through-p t)))
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;; And this also stashes a request, but waits. Eventually the
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;; flag is cleared in time and both requests go through.
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(jsonrpc-request conn 'ignore ["third deferred"]
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:deferred "third deferred"
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:timeout 1)
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;; Wait another 0.5 secs just in case the success handlers of
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;; one of these last two requests didn't quite have a chance to
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;; run (Emacs 25.2 apparentely needs this).
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(accept-process-output nil 0.5)
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(should second-deferred-went-through-p)
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(should (eq 1 n-deferred-1))
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(should (eq 2 n-deferred-2))
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(should (eq 0 (hash-table-count (jsonrpc--deferred-actions conn)))))))
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(provide 'jsonrpc-tests)
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;;; jsonrpc-tests.el ends here
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