test: http outgoing _renderHeaders

PR-URL: #13981 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Refael Ackermann <[email protected]>

Author: peteyycz

test/parallel/test-http-outgoing-renderHeaders.js

@@ -0,0 +1,46 @@
+'use strict';
+// Flags: --expose-internals
+
+require('../common');
+constassert=require('assert');
+
+constoutHeadersKey=require('internal/http').outHeadersKey;
+consthttp=require('http');
+constOutgoingMessage=http.OutgoingMessage;
+
+{
+constoutgoingMessage=newOutgoingMessage();
+outgoingMessage._header={};
+assert.throws(
+outgoingMessage._renderHeaders.bind(outgoingMessage),
+/^Error:Can'trenderheadersaftertheyaresenttotheclient$/
+);
+}
+
+{
+constoutgoingMessage=newOutgoingMessage();
+outgoingMessage[outHeadersKey]=null;
+constresult=outgoingMessage._renderHeaders();
+assert.deepStrictEqual(result,{});
+}
+
+
+{
+constoutgoingMessage=newOutgoingMessage();
+outgoingMessage[outHeadersKey]={};
+constresult=outgoingMessage._renderHeaders();
+assert.deepStrictEqual(result,{});
+}
+
+{
+constoutgoingMessage=newOutgoingMessage();
+outgoingMessage[outHeadersKey]={
+host: ['host','nodejs.org'],
+origin: ['Origin','localhost']
+};
+constresult=outgoingMessage._renderHeaders();
+assert.deepStrictEqual(result,{
+host: 'nodejs.org',
+Origin: 'localhost'
+});
+}