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'use strict'; const common = require('../common'); const http = require('http'); const assert = require('assert'); const expected = { '__proto__': null, 'testheader1': 'foo', 'testheader2': 'bar', 'testheader3': 'xyz' }; const server = http.createServer(common.mustCall((req, res) => { let retval = res.setHeader('testheader1', 'foo'); // Test that the setHeader returns the same response object. assert.strictEqual(retval, res); retval = res.setHeader('testheader2', 'bar').setHeader('testheader3', 'xyz'); // Test that chaining works for setHeader. assert.deepStrictEqual(res.getHeaders(), expected); res.end('ok'); })); server.listen(0, () => { http.get({ port: server.address().port }, common.mustCall((res) => { res.on('data', () => {}); res.on('end', common.mustCall(() => { server.close(); })); })); });