Drop YTest (#14)

* Drop YTest

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

tests/test_pycrdt_yjs.py

@@ -1,75 +1,69 @@
+from __future__ import annotations
+
+from functools import partial
+
 import pytest
-from anyio import Event, create_task_group, move_on_after, sleep
+from anyio import Event, fail_after
 from pycrdt import Array, Doc, Map
 from websockets import connect
 
 from pycrdt_websocket import WebsocketProvider
 
 
-class YTest:
-    def __init__(self, ydoc: Doc, timeout: float = 1.0):
-        self.ydoc = ydoc
+class Change:
+    def __init__(self, event, timeout, ydata, sid, key):
+        self.event = event
         self.timeout = timeout
-        self.ydoc["_test"] = self.ytest = Map()
-        self.clock = -1.0
+        self.ydata = ydata
+        self.sid = sid
+        self.key = key
 
-    def run_clock(self):
-        self.clock = max(self.clock, 0.0)
-        self.ytest["clock"] = self.clock
+    async def wait(self):
+        with fail_after(self.timeout):
+            await self.event.wait()
+        self.ydata.unobserve(self.sid)
+        if self.key is None:
+            return
+        return self.ydata[self.key]
 
-    async def clock_run(self):
-        change = Event()
 
-        def callback(event):
-            if "clock" in event.keys:
-                clk = event.keys["clock"]["newValue"]
-                if clk > self.clock:
-                    self.clock = clk + 1.0
-                    change.set()
+def callback(change_event, key, event):
+    if key is None or key in event.keys:
+        change_event.set()
 
-        subscription_id = self.ytest.observe(callback)
-        async with create_task_group():
-            with move_on_after(self.timeout):
-                await change.wait()
 
-        self.ytest.unobserve(subscription_id)
+def watch(ydata, key: str | None = None, timeout: float = 1.0):
+    change_event = Event()
+    sid = ydata.observe(partial(callback, change_event, key))
+    return Change(change_event, timeout, ydata, sid, key)
 
 
 @pytest.mark.anyio
 @pytest.mark.parametrize("yjs_client", "0", indirect=True)
 async def test_pycrdt_yjs_0(yws_server, yjs_client):
     ydoc = Doc()
-    ytest = YTest(ydoc)
     async with connect("ws://127.0.0.1:1234/my-roomname") as websocket, WebsocketProvider(
         ydoc, websocket
     ):
         ydoc["map"] = ymap = Map()
-        # set a value in "in"
         for v_in in range(10):
             ymap["in"] = float(v_in)
-            ytest.run_clock()
-            await ytest.clock_run()
-            v_out = ymap["out"]
+            v_out = await watch(ymap, "out").wait()
             assert v_out == v_in + 1.0
 
 
 @pytest.mark.anyio
 @pytest.mark.parametrize("yjs_client", "1", indirect=True)
 async def test_pycrdt_yjs_1(yws_server, yjs_client):
-    # wait for the JS client to connect
-    tt, dt = 0, 0.1
-    while True:
-        await sleep(dt)
-        if "/my-roomname" in yws_server.rooms:
-            break
-        tt += dt
-        if tt >= 1:
-            raise RuntimeError("Timeout waiting for client to connect")
-    ydoc = yws_server.rooms["/my-roomname"].ydoc
-    ytest = YTest(ydoc)
-    ytest.run_clock()
-    await ytest.clock_run()
+    ydoc = Doc()
     ydoc["cells"] = ycells = Array()
     ydoc["state"] = ystate = Map()
-    assert ycells.to_py() == [{"metadata": {"foo": "bar"}, "source": "1 + 2"}]
-    assert ystate.to_py() == {"state": {"dirty": False}}
+    ycells_change = watch(ycells)
+    ystate_change = watch(ystate)
+    async with connect("ws://127.0.0.1:1234/my-roomname") as websocket, WebsocketProvider(
+        ydoc, websocket
+    ):
+        await ycells_change.wait()
+        await ystate_change.wait()
+        assert ycells.to_py() == [{"metadata": {"foo": "bar"}, "source": "1 + 2"}]
+        assert ystate.to_py() == {"state": {"dirty": False}}

tests/yjs_client_0.js

@@ -1,32 +1,24 @@
 const Y = require('yjs')
 const WebsocketProvider = require('y-websocket').WebsocketProvider
+const ws = require('ws')
 
 const ydoc = new Y.Doc()
-const ytest = ydoc.getMap('_test')
 const ymap = ydoc.getMap('map')
-const ws = require('ws')
+
+function increment(resolve) {
+  ymap.set('out', ymap.get('in') + 1);
+  resolve();
+}
+
+ymap.observe(event => {
+  if (event.transaction.local || !event.changes.keys.has('in')) {
+    return
+  }
+  new Promise(increment);
+})
 
 const wsProvider = new WebsocketProvider(
   'ws://127.0.0.1:1234', 'my-roomname',
   ydoc,
   { WebSocketPolyfill: ws }
 )
-
-wsProvider.on('status', event => {
-  console.log(event.status)
-})
-
-var clock = -1
-
-ytest.observe(event => {
-  event.changes.keys.forEach((change, key) => {
-    if (key === 'clock') {
-      const clk = ytest.get('clock')
-      if (clk > clock) {
-        ymap.set('out', ymap.get('in') + 1)
-        clock = clk + 1
-        ytest.set('clock', clock)
-      }
-    }
-  })
-})

tests/yjs_client_1.js

@@ -1,35 +1,21 @@
 const Y = require('yjs')
 const WebsocketProvider = require('y-websocket').WebsocketProvider
+const ws = require('ws')
 
 const ydoc = new Y.Doc()
-const ytest = ydoc.getMap('_test')
-const ycells = ydoc.getArray("cells")
-const ystate = ydoc.getMap("state")
-const ws = require('ws')
 
 const wsProvider = new WebsocketProvider(
   'ws://127.0.0.1:1234', 'my-roomname',
   ydoc,
   { WebSocketPolyfill: ws }
 )
 
-wsProvider.on('status', event => {
-  console.log(event.status)
-})
-
-var clock = -1
+wsProvider.on('sync', () => {
+  const ycells = ydoc.getArray('cells')
+  const ystate = ydoc.getMap('state')
 
-ytest.observe(event => {
-  event.changes.keys.forEach((change, key) => {
-    if (key === 'clock') {
-      const clk = ytest.get('clock')
-      if (clk > clock) {
-        const cells = [new Y.Map([['source', new Y.Text('1 + 2')], ['metadata', {'foo': 'bar'}]])]
-        ycells.push(cells)
-        ystate.set('state', {'dirty': false})
-        clock = clk + 1
-        ytest.set('clock', clock)
-      }
-    }
-  })
+  const cells = [new Y.Map([['source', new Y.Text('1 + 2')], ['metadata', {'foo': 'bar'}]])]
+  const state = {'dirty': false}
+  ycells.push(cells)
+  ystate.set('state', state)
 })