Document HTTP body chunk diagnostics and update inspector network test

doc/api/diagnostics_channel.md

@@ -1576,13 +1576,35 @@ Unlike `http.client.request.start`, this event is emitted before the request has
 
 Emitted when client starts a request.
 
+##### Event: `'http.client.request.bodyChunkSent'`
+
+* `request` {http.ClientRequest}
+* `chunk` {string|Buffer|TypedArray|DataView}
+* `encoding` {string|null}
+
+Emitted when a chunk of the client request body is being sent.
+
+##### Event: `'http.client.request.bodySent'`
+
+* `request` {http.ClientRequest}
+
+Emitted after the client request body has been fully sent.
+
 ##### Event: `'http.client.request.error'`
 
 * `request` {http.ClientRequest}
 * `error` {Error}
 
 Emitted when an error occurs during a client request.
 
+##### Event: `'http.client.response.bodyChunkReceived'`
+
+* `request` {http.ClientRequest}
+* `response` {http.IncomingMessage}
+* `chunk` {Buffer}
+
+Emitted when a chunk of the client response body is received.
+
 ##### Event: `'http.client.response.finish'`
 
 * `request` {http.ClientRequest}

test/parallel/test-inspector-network-http.js

@@ -59,23 +59,29 @@ const handleRequest = (req, res) => {
     case '/text-body': {
       const chunks = [];
       req.on('data', (chunk) => chunks.push(chunk));
-      req.on('end', common.mustCall(() => {
-        assert.strictEqual(Buffer.concat(chunks).toString(), 'foobar');
+      req.on('end', () => {
+        if (Buffer.concat(chunks).toString() !== 'foobar') {
+          throw new Error('Unexpected text request body');
+        }
         setResponseHeaders(res);
         res.writeHead(200);
         res.end('hello world\n');
-      }));
+      });
       break;
     }
     case '/binary-body': {
       const chunks = [];
       req.on('data', (chunk) => chunks.push(chunk));
-      req.on('end', common.mustCall(() => {
-        assert.deepStrictEqual(Buffer.concat(chunks), Buffer.from([0, 1, 2, 3]));
+      req.on('end', () => {
+        const body = Buffer.concat(chunks);
+        const expectedBody = Buffer.from([0, 1, 2, 3]);
+        if (!body.equals(expectedBody)) {
+          throw new Error('Unexpected binary request body');
+        }
         setResponseHeaders(res);
         res.writeHead(200);
         res.end('hello world\n');
-      }));
+      });
       break;
     }
     default: