src: use consistent names for JSStream

Its confusing to call a js class with a handle a "Wrap", usually it's
the C++ handle that is called a Wrap (tcp_wrap, tls_wrap, ...). Its
derived from Socket, and makes a JS stream look like a Socket, so call
it that. Also, remove use of lib/_stream_wrap.js so it can be deprecated
some time.

lib/_stream_wrap.js

@@ -1,3 +1,3 @@
 'use strict';
 
-module.exports = require('internal/wrap_js_stream');
+module.exports = require('internal/js_stream_socket');

lib/_tls_wrap.js

@@ -29,7 +29,7 @@ const net = require('net');
 const tls = require('tls');
 const util = require('util');
 const common = require('_tls_common');
-const { StreamWrap } = require('_stream_wrap');
+const JSStreamSocket = require('internal/js_stream_socket');
 const { Buffer } = require('buffer');
 const debug = util.debuglog('tls');
 const { TCP, constants: TCPConstants } = internalBinding('tcp_wrap');
@@ -310,12 +310,14 @@ function TLSSocket(socket, opts) {
   this.authorizationError = null;
   this[kRes] = null;
 
-  // Wrap plain JS Stream into StreamWrap
   var wrap;
   if ((socket instanceof net.Socket && socket._handle) || !socket) {
     wrap = socket;
   } else {
-    wrap = new StreamWrap(socket);
+    // TLS expects to interact from C++ with a net.Socket that has a C++ stream
+    // handle, but a JS stream doesn't have one. Wrap it up to make it look like
+    // a socket.
+    wrap = new JSStreamSocket(socket);
     wrap.once('close', () => this.destroy());
   }
 

lib/internal/http2/core.js

@@ -22,7 +22,7 @@ const util = require('util');
 
 const { kIncomingMessage } = require('_http_common');
 const { kServerResponse } = require('_http_server');
-const { StreamWrap } = require('_stream_wrap');
+const JSStreamSocket = require('internal/js_stream_socket');
 
 const {
   defaultTriggerAsyncIdScope,
@@ -935,7 +935,7 @@ class Http2Session extends EventEmitter {
     super();
 
     if (!socket._handle || !socket._handle._externalStream) {
-      socket = new StreamWrap(socket);
+      socket = new JSStreamSocket(socket);
     }
 
     // No validation is performed on the input parameters because this

lib/internal/wrap_js_stream.js → lib/internal/js_stream_socket.js

@@ -5,7 +5,7 @@ const util = require('util');
 const { Socket } = require('net');
 const { JSStream } = internalBinding('js_stream');
 const uv = internalBinding('uv');
-const debug = util.debuglog('stream_wrap');
+const debug = util.debuglog('stream_socket');
 const { owner_symbol } = require('internal/async_hooks').symbols;
 const { ERR_STREAM_WRAP } = require('internal/errors').codes;
 
@@ -29,17 +29,17 @@ function onwrite(req, bufs) { return this[owner_symbol].doWrite(req, bufs); }
  * can skip going through the JS layer and let TLS access the raw C++ handle
  * of a net.Socket. The flipside of this is that, to maintain composability,
  * we need a way to create "fake" net.Socket instances that call back into a
- * "real" JavaScript stream. JSStreamWrap is exactly this.
+ * "real" JavaScript stream. JSStreamSocket is exactly this.
  */
-class JSStreamWrap extends Socket {
+class JSStreamSocket extends Socket {
   constructor(stream) {
     const handle = new JSStream();
     handle.close = (cb) => {
       debug('close');
       this.doClose(cb);
     };
     // Inside of the following functions, `this` refers to the handle
-    // and `this[owner_symbol]` refers to this JSStreamWrap instance.
+    // and `this[owner_symbol]` refers to this JSStreamSocket instance.
     handle.isClosing = isClosing;
     handle.onreadstart = onreadstart;
     handle.onreadstop = onreadstop;
@@ -88,9 +88,10 @@ class JSStreamWrap extends Socket {
     this.read(0);
   }
 
-  // Legacy
+  // Allow legacy requires in the test suite to keep working:
+  //   const { StreamWrap } = require('internal/js_stream_socket')
   static get StreamWrap() {
-    return JSStreamWrap;
+    return JSStreamSocket;
   }
 
   isClosing() {
@@ -223,4 +224,4 @@ class JSStreamWrap extends Socket {
   }
 }
 
-module.exports = JSStreamWrap;
+module.exports = JSStreamSocket;

node.gyp

@@ -126,6 +126,7 @@
       'lib/internal/fs/watchers.js',
       'lib/internal/http.js',
       'lib/internal/inspector_async_hook.js',
+      'lib/internal/js_stream_socket.js',
       'lib/internal/linkedlist.js',
       'lib/internal/modules/cjs/helpers.js',
       'lib/internal/modules/cjs/loader.js',
@@ -188,7 +189,6 @@
       'lib/internal/streams/state.js',
       'lib/internal/streams/pipeline.js',
       'lib/internal/streams/end-of-stream.js',
-      'lib/internal/wrap_js_stream.js',
       'deps/v8/tools/splaytree.js',
       'deps/v8/tools/codemap.js',
       'deps/v8/tools/consarray.js',

test/parallel/test-stream-wrap-drain.js

@@ -2,12 +2,12 @@
 'use strict';
 const common = require('../common');
 const assert = require('assert');
-const { StreamWrap } = require('_stream_wrap');
+const { StreamWrap } = require('internal/js_stream_socket');
 const { Duplex } = require('stream');
 const { internalBinding } = require('internal/test/binding');
 const { ShutdownWrap } = internalBinding('stream_wrap');
 
-// This test makes sure that when an instance of JSStreamWrap is waiting for
+// This test makes sure that when a wrapped stream is waiting for
 // a "drain" event to `doShutdown`, the instance will work correctly when a
 // "drain" event emitted.
 {

test/parallel/test-stream-wrap-encoding.js

@@ -1,7 +1,8 @@
+// Flags: --expose-internals
 'use strict';
 const common = require('../common');
 
-const StreamWrap = require('_stream_wrap');
+const StreamWrap = require('internal/js_stream_socket');
 const Duplex = require('stream').Duplex;
 
 {

test/parallel/test-stream-wrap.js

@@ -4,7 +4,7 @@ const common = require('../common');
 const assert = require('assert');
 
 const { internalBinding } = require('internal/test/binding');
-const StreamWrap = require('_stream_wrap');
+const StreamWrap = require('internal/js_stream_socket');
 const { Duplex } = require('stream');
 const { ShutdownWrap } = internalBinding('stream_wrap');
 

test/parallel/test-wrap-js-stream-destroy.js

@@ -1,7 +1,8 @@
+// Flags: --expose-internals
 'use strict';
 
 const common = require('../common');
-const StreamWrap = require('_stream_wrap');
+const StreamWrap = require('internal/js_stream_socket');
 const net = require('net');
 
 // This test ensures that when we directly call `socket.destroy()` without

test/parallel/test-wrap-js-stream-duplex.js

@@ -1,7 +1,8 @@
+// Flags: --expose-internals
 'use strict';
 const common = require('../common');
 const assert = require('assert');
-const StreamWrap = require('_stream_wrap');
+const StreamWrap = require('internal/js_stream_socket');
 const { PassThrough } = require('stream');
 const { Socket } = require('net');
 

test/parallel/test-wrap-js-stream-exceptions.js

@@ -2,7 +2,7 @@
 'use strict';
 const common = require('../common');
 const assert = require('assert');
-const JSStreamWrap = require('internal/wrap_js_stream');
+const JSStreamWrap = require('internal/js_stream_socket');
 const { Duplex } = require('stream');
 
 process.once('uncaughtException', common.mustCall((err) => {

test/parallel/test-wrap-js-stream-read-stop.js

@@ -3,7 +3,7 @@
 
 require('../common');
 const assert = require('assert');
-const WrapStream = require('internal/wrap_js_stream');
+const WrapStream = require('internal/js_stream_socket');
 const Stream = require('stream');
 
 class FakeStream extends Stream {