test: http add tests for content-length mismatch

test/parallel/test-http-content-length-mismatch.js

@@ -0,0 +1,87 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const http = require('http');
+
+function shouldThrowOnMismatch() {
+  const server = http.createServer(common.mustCall((req, res) => {
+    res.setHeader('Content-Length', 5);
+    assert.throws(() => {
+      res.write('hello');
+      res.write('a');
+      res.statusCode = 200;
+    }, {
+      code: 'ERR_HTTP_CONTENT_LENGTH_MISMATCH'
+    })
+    res.end();
+  }));
+
+  server.listen(0, () => {
+    http.get({
+      port: server.address().port,
+    }, common.mustCall((res) => {
+      console.log(res.statusMessage);
+      res.resume();
+      assert.strictEqual(res.statusCode, 200);
+      server.close();
+    }));
+  });
+}
+
+function shouldNotThrow() {
+  const server = http.createServer(common.mustCall((req, res) => {
+    assert.doesNotThrow(() => {
+      res.write('hello');
+      res.write('a');
+      res.statusCode = 200;
+    })
+    res.end();
+  }));
+
+  server.listen(0, () => {
+    http.get({
+      port: server.address().port,
+      headers: {
+        'Content-Length': '6'
+      }
+    }, common.mustCall((res) => {
+      console.log(res.statusMessage);
+      res.resume();
+      assert.strictEqual(res.statusCode, 200);
+      server.close();
+    }));
+  });
+}
+
+function shouldOverwriteContentLength() {
+  const server = http.createServer(common.mustCall((req, res) => {
+    res.writeHead(200, {
+      'Content-Length': '1'
+    })
+    assert.throws(() => {
+      res.write('hello');
+      res.write('a');
+      res.statusCode = 200;
+    })
+    res.end();
+  }));
+
+  server.listen(0, () => {
+    http.get({
+      port: server.address().port,
+      headers: {
+        'Content-Length': '6'
+      }
+    }, common.mustCall((res) => {
+      console.log(res.statusMessage);
+      res.resume();
+      assert.strictEqual(res.statusCode, 200);
+      server.close();
+    }));
+  });
+}
+
+shouldThrowOnMismatch()
+shouldNotThrow()
+shouldOverwriteContentLength()