Implement the ydoc js bundle test

build.sbt

@@ -1250,14 +1250,15 @@ lazy val `ydoc-server` = project
       (`profiling-utils` / Compile / productDirectories).value.head
     ),
     libraryDependencies ++= Seq(
-      "org.graalvm.truffle"  % "truffle-api"                 % graalMavenPackagesVersion % "provided",
-      "org.graalvm.polyglot" % "inspect"                     % graalMavenPackagesVersion % "runtime",
-      "org.graalvm.polyglot" % "js"                          % graalMavenPackagesVersion % "runtime",
-      "org.slf4j"            % "slf4j-api"                   % slf4jVersion,
-      "io.helidon.webclient" % "helidon-webclient-websocket" % helidonVersion,
-      "io.helidon.webserver" % "helidon-webserver-websocket" % helidonVersion,
-      "junit"                % "junit"                       % junitVersion              % Test,
-      "com.github.sbt"       % "junit-interface"             % junitIfVersion            % Test
+      "org.graalvm.truffle"        % "truffle-api"                 % graalMavenPackagesVersion % "provided",
+      "org.graalvm.polyglot"       % "inspect"                     % graalMavenPackagesVersion % "runtime",
+      "org.graalvm.polyglot"       % "js"                          % graalMavenPackagesVersion % "runtime",
+      "org.slf4j"                  % "slf4j-api"                   % slf4jVersion,
+      "io.helidon.webclient"       % "helidon-webclient-websocket" % helidonVersion,
+      "io.helidon.webserver"       % "helidon-webserver-websocket" % helidonVersion,
+      "junit"                      % "junit"                       % junitVersion              % Test,
+      "com.github.sbt"             % "junit-interface"             % junitIfVersion            % Test,
+      "com.fasterxml.jackson.core" % "jackson-databind"            % jacksonVersion            % Test
     )
   )
   // `Compile/run` settings are necessary for the `run` task to work.

lib/java/ydoc-server/src/main/java/org/enso/ydoc/Main.java

@@ -4,6 +4,9 @@
 
 public class Main {
 
+  private static final String ENSO_YDOC_HOST = "ENSO_YDOC_HOST";
+  private static final String ENSO_YDOC_PORT = "ENSO_YDOC_PORT";
+
   private static final Semaphore lock = new Semaphore(0);
 
   private Main() {}
@@ -15,7 +18,19 @@ public static void main(String[] args) throws Exception {
 
     Sampling.init();
 
-    try (var ydoc = Ydoc.builder().build()) {
+    var ydocHost = System.getenv(ENSO_YDOC_HOST);
+    var ydocPort = System.getenv(ENSO_YDOC_PORT);
+
+    var builder = Ydoc.builder();
+    if (ydocHost != null) {
+      builder.hostname(ydocHost);
+    }
+    if (ydocPort != null) {
+      var port = Integer.parseInt(ydocPort);
+      builder.port(port);
+    }
+
+    try (var ydoc = builder.build()) {
       ydoc.start();
       lock.acquire();
     }

lib/java/ydoc-server/src/test/java/org/enso/ydoc/YdocTest.java

@@ -1,32 +1,50 @@
 package org.enso.ydoc;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import io.helidon.common.buffers.BufferData;
 import io.helidon.webclient.websocket.WsClient;
 import io.helidon.webserver.WebServer;
 import io.helidon.webserver.websocket.WsRouting;
 import io.helidon.websocket.WsListener;
 import io.helidon.websocket.WsSession;
+import java.util.List;
+import java.util.UUID;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+import org.enso.ydoc.jsonrpc.JsonRpcRequest;
+import org.enso.ydoc.jsonrpc.JsonRpcResponse;
+import org.enso.ydoc.jsonrpc.model.ContentRoot;
+import org.enso.ydoc.jsonrpc.model.FilePath;
+import org.enso.ydoc.jsonrpc.model.FileSystemObject;
+import org.enso.ydoc.jsonrpc.model.WriteCapability;
+import org.enso.ydoc.jsonrpc.model.result.FileListResult;
+import org.enso.ydoc.jsonrpc.model.result.InitProtocolConnectionResult;
+import org.enso.ydoc.jsonrpc.model.result.TextOpenFileResult;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class YdocTest {
 
   private static final int WEB_SERVER_PORT = 44556;
-  private static final String YDOC_URL = "ws://localhost:1234/project/index";
+  private static final String YDOC_URL = "ws://localhost:1234/project/";
   private static final String WEB_SERVER_URL = "ws://127.0.0.1:" + WEB_SERVER_PORT;
 
+  private static final Logger log = LoggerFactory.getLogger(YdocTest.class);
+
   private Ydoc ydoc;
   private ExecutorService webServerExecutor;
   private WebServer ls;
 
   private static WebServer startWebSocketServer(ExecutorService executor) {
-    var routing = WsRouting.builder().endpoint("/", new WebServerWsListener());
+    var routing = WsRouting.builder().endpoint("/", new LanguageServerConnection());
     var ws =
         WebServer.builder().host("localhost").port(WEB_SERVER_PORT).addRouting(routing).build();
 
@@ -35,6 +53,10 @@ private static WebServer startWebSocketServer(ExecutorService executor) {
     return ws;
   }
 
+  private static String ydocUrl(String doc) {
+    return YDOC_URL + doc + "?ls=" + WEB_SERVER_URL;
+  }
+
   @Before
   public void setup() {
     webServerExecutor = Executors.newSingleThreadExecutor();
@@ -45,39 +67,149 @@ public void setup() {
   @After
   public void tearDown() throws Exception {
     ls.stop();
-    webServerExecutor.shutdownNow();
+    webServerExecutor.shutdown();
+    var stopped = webServerExecutor.awaitTermination(3, TimeUnit.SECONDS);
+    if (!stopped) {
+      var pending = webServerExecutor.shutdownNow();
+      log.error("Executor pending [{}] tasks: [{}].", pending.size(), pending);
+    }
     ydoc.close();
   }
 
   @Test
-  public void connect() throws Exception {
+  public void initialize() throws Exception {
     var queue = new LinkedBlockingQueue<BufferData>();
-    var url = YDOC_URL + "?ls=" + WEB_SERVER_URL;
 
     ydoc.start();
 
     var ws = WsClient.builder().build();
-    ws.connect(url, new TestWsListener(queue));
+    ws.connect(ydocUrl("index"), new DashboardConnection(queue));
 
-    var msg = queue.take();
-    Assert.assertArrayEquals(new byte[] {0, 0, 1, 0}, msg.readBytes());
+    var ok1 = queue.take();
+    Assert.assertTrue(ok1.debugDataHex(), BufferDataUtil.isOk(ok1));
+
+    var buffer = queue.take();
+    var uuid = BufferDataUtil.readUUID(buffer);
+    WsClient.builder().build().connect(ydocUrl(uuid.toString()), new DashboardConnection(queue));
+
+    var ok2 = queue.take();
+    Assert.assertTrue(ok2.debugDataHex(), BufferDataUtil.isOk(ok2));
+  }
+
+  private static final class BufferDataUtil {
+
+    private static final int UUID_BYTES = 36;
+    private static final int SUFFIX_BYTES = 3;
+
+    private static boolean isOk(BufferData data) {
+      return data.readInt16() == 0;
+    }
+
+    private static UUID readUUID(BufferData data) {
+      try {
+        data.skip(data.available() - UUID_BYTES - SUFFIX_BYTES);
+        var uuidString = data.readString(UUID_BYTES);
+        return UUID.fromString(uuidString);
+      } catch (Exception e) {
+        log.error("Failed to read UUID of\n{}", data.debugDataHex());
+        throw e;
+      }
+    }
   }
 
-  private static final class TestWsListener implements WsListener {
+  private static final class DashboardConnection implements WsListener {
+
+    private static final Logger log = LoggerFactory.getLogger(DashboardConnection.class);
 
     private final BlockingQueue<BufferData> messages;
 
-    TestWsListener(BlockingQueue<BufferData> messages) {
+    private DashboardConnection(BlockingQueue<BufferData> messages) {
       this.messages = messages;
     }
 
     @Override
     public void onMessage(WsSession session, BufferData buffer, boolean last) {
+      log.debug("Got message\n{}", buffer.debugDataHex());
+
       messages.add(buffer);
     }
+
+    @Override
+    public void onMessage(WsSession session, String text, boolean last) {
+      log.error("Got unexpected message [{}].", text);
+    }
   }
 
-  private static final class WebServerWsListener implements WsListener {
-    WebServerWsListener() {}
+  private static final class LanguageServerConnection implements WsListener {
+
+    private static final String METHOD_INIT_PROTOCOL_CONNECTION = "session/initProtocolConnection";
+    private static final String METHOD_CAPABILITY_ACQUIRE = "capability/acquire";
+    private static final String METHOD_FILE_LIST = "file/list";
+    private static final String METHOD_TEXT_OPEN_FILE = "text/openFile";
+
+    private static final UUID PROJECT_ROOT_ID = new UUID(0, 1);
+
+    private static final Logger log = LoggerFactory.getLogger(LanguageServerConnection.class);
+
+    private static final ObjectMapper objectMapper = new ObjectMapper();
+
+    private LanguageServerConnection() {}
+
+    @Override
+    public void onMessage(WsSession session, String text, boolean last) {
+      log.debug("Got message [{}].", text);
+
+      try {
+        var request = objectMapper.readValue(text, JsonRpcRequest.class);
+
+        JsonRpcResponse jsonRpcResponse = null;
+
+        switch (request.method()) {
+          case METHOD_INIT_PROTOCOL_CONNECTION -> {
+            var contentRoots =
+                List.of(
+                    new ContentRoot("Project", PROJECT_ROOT_ID),
+                    new ContentRoot("Home", new UUID(0, 2)),
+                    new ContentRoot("FileSystemRoot", new UUID(0, 3), "/"));
+            var initProtocolConnectionResult =
+                new InitProtocolConnectionResult("0.0.0-dev", "0.0.0-dev", contentRoots);
+            jsonRpcResponse = new JsonRpcResponse(request.id(), initProtocolConnectionResult);
+          }
+          case METHOD_CAPABILITY_ACQUIRE -> jsonRpcResponse = JsonRpcResponse.ok(request.id());
+          case METHOD_FILE_LIST -> {
+            var paths =
+                List.of(
+                    FileSystemObject.file(
+                        "Main.enso", new FilePath(PROJECT_ROOT_ID, List.of("src"))));
+            var fileListResult = new FileListResult(paths);
+            jsonRpcResponse = new JsonRpcResponse(request.id(), fileListResult);
+          }
+          case METHOD_TEXT_OPEN_FILE -> {
+            var options =
+                new WriteCapability.Options(
+                    new FilePath(PROJECT_ROOT_ID, List.of("src", "Main.enso")));
+            var writeCapability = new WriteCapability("text/canEdit", options);
+            var textOpenFileResult =
+                new TextOpenFileResult(
+                    writeCapability,
+                    "main =",
+                    "e5aeae8609bd90f94941d4227e6ec1e0f069d3318fb7bd93ffe4d391");
+            jsonRpcResponse = new JsonRpcResponse(request.id(), textOpenFileResult);
+          }
+        }
+
+        if (jsonRpcResponse != null) {
+          var response = objectMapper.writeValueAsString(jsonRpcResponse);
+
+          log.debug("Sending [{}].", response);
+          session.send(response, true);
+        } else {
+          log.error("Unknown request.");
+        }
+      } catch (JsonProcessingException e) {
+        log.error("Failed to parse JSON.", e);
+        Assert.fail(e.getMessage());
+      }
+    }
   }
 }

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/JsonRpcRequest.java

@@ -0,0 +1,5 @@
+package org.enso.ydoc.jsonrpc;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+public record JsonRpcRequest(String jsonrpc, String id, String method, JsonNode params) {}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/JsonRpcResponse.java

@@ -0,0 +1,16 @@
+package org.enso.ydoc.jsonrpc;
+
+import org.enso.ydoc.jsonrpc.model.result.Result;
+
+public record JsonRpcResponse(String jsonrpc, String id, Result result) {
+
+  private static final String JSONRPC_VERSION_2_0 = "2.0";
+
+  public JsonRpcResponse(String id, Result result) {
+    this(JSONRPC_VERSION_2_0, id, result);
+  }
+
+  public static JsonRpcResponse ok(String id) {
+    return new JsonRpcResponse(id, null);
+  }
+}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/ContentRoot.java

@@ -0,0 +1,10 @@
+package org.enso.ydoc.jsonrpc.model;
+
+import java.util.UUID;
+
+public record ContentRoot(String type, UUID id, String path) {
+
+  public ContentRoot(String type, UUID id) {
+    this(type, id, null);
+  }
+}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/FilePath.java

@@ -0,0 +1,6 @@
+package org.enso.ydoc.jsonrpc.model;
+
+import java.util.List;
+import java.util.UUID;
+
+public record FilePath(UUID rootId, List<String> segments) {}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/FileSystemObject.java

@@ -0,0 +1,8 @@
+package org.enso.ydoc.jsonrpc.model;
+
+public record FileSystemObject(String type, String name, FilePath path) {
+
+  public static FileSystemObject file(String name, FilePath path) {
+    return new FileSystemObject("File", name, path);
+  }
+}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/WriteCapability.java

@@ -0,0 +1,6 @@
+package org.enso.ydoc.jsonrpc.model;
+
+public record WriteCapability(String method, Options registerOptions) {
+
+  public record Options(FilePath path) {}
+}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/result/FileListResult.java

@@ -0,0 +1,6 @@
+package org.enso.ydoc.jsonrpc.model.result;
+
+import java.util.List;
+import org.enso.ydoc.jsonrpc.model.FileSystemObject;
+
+public record FileListResult(List<FileSystemObject> paths) implements Result {}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/result/InitProtocolConnectionResult.java

@@ -0,0 +1,7 @@
+package org.enso.ydoc.jsonrpc.model.result;
+
+import java.util.List;
+import org.enso.ydoc.jsonrpc.model.ContentRoot;
+
+public record InitProtocolConnectionResult(
+    String ensoVersion, String currentEdition, List<ContentRoot> contentRoots) implements Result {}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/result/Result.java

@@ -0,0 +1,3 @@
+package org.enso.ydoc.jsonrpc.model.result;
+
+public interface Result {}

lib/java/ydoc-server/src/test/java/org/enso/ydoc/jsonrpc/model/result/TextOpenFileResult.java

@@ -0,0 +1,6 @@
+package org.enso.ydoc.jsonrpc.model.result;
+
+import org.enso.ydoc.jsonrpc.model.WriteCapability;
+
+public record TextOpenFileResult(
+    WriteCapability writeCapability, String content, String currentVersion) implements Result {}