test: improve to use template string

test/message/error_exit.js

@@ -24,7 +24,7 @@ require('../common');
 const assert = require('assert');
 
 process.on('exit', function(code) {
-  console.error('Exiting with code=%d', code);
+  console.error(`Exiting with code=${code}`);
 });
 
 assert.strictEqual(1, 2);

test/message/max_tick_depth.js

@@ -25,7 +25,7 @@ require('../common');
 process.maxTickDepth = 10;
 let i = 20;
 process.nextTick(function f() {
-  console.error('tick %d', i);
+  console.error(`tick ${i}`);
   if (i-- > 0)
     process.nextTick(f);
 });

test/parallel/test-cluster-net-send.js

@@ -26,7 +26,7 @@ const fork = require('child_process').fork;
 const net = require('net');
 
 if (process.argv[2] !== 'child') {
-  console.error('[%d] master', process.pid);
+  console.error(`[${process.pid}] master`);
 
   const worker = fork(__filename, ['child']);
   let called = false;
@@ -50,7 +50,7 @@ if (process.argv[2] !== 'child') {
     assert.ok(called);
   });
 } else {
-  console.error('[%d] worker', process.pid);
+  console.error(`[${process.pid}] worker`);
 
   let socket;
   let cbcalls = 0;

test/parallel/test-domain-http-server.js

@@ -62,7 +62,7 @@ server.listen(0, next);
 
 function next() {
   const port = this.address().port;
-  console.log('listening on localhost:%d', port);
+  console.log(`listening on localhost:${port}`);
 
   let requests = 0;
   let responses = 0;
@@ -87,7 +87,7 @@ function next() {
     dom.add(req);
     req.on('response', function(res) {
       responses++;
-      console.error('requests=%d responses=%d', requests, responses);
+      console.error(`requests=${requests} responses=${responses}`);
       if (responses === requests) {
         console.error('done, closing server');
         // no more coming.

test/parallel/test-file-write-stream2.js

@@ -41,8 +41,8 @@ process.on('exit', function() {
   removeTestFile();
   if (cb_occurred !== cb_expected) {
     console.log('  Test callback events missing or out of order:');
-    console.log('    expected: %j', cb_expected);
-    console.log('    occurred: %j', cb_occurred);
+    console.log(`    expected: ${cb_expected}`);
+    console.log(`    occurred: ${cb_occurred}`);
     assert.strictEqual(
       cb_occurred, cb_expected,
       `events missing or out of order: "${cb_occurred}" !== "${cb_expected}"`);
@@ -78,7 +78,7 @@ file.on('drain', function() {
   if (countDrains === 1) {
     console.error('drain=1, write again');
     assert.strictEqual(fs.readFileSync(filepath, 'utf8'), EXPECTED);
-    console.error('ondrain write ret=%j', file.write(EXPECTED));
+    console.error(`ondrain write ret= ${file.write(EXPECTED)}`);
     cb_occurred += 'write ';
   } else if (countDrains === 2) {
     console.error('second drain, end');
@@ -102,7 +102,7 @@ file.on('error', function(err) {
 
 for (let i = 0; i < 11; i++) {
   const ret = file.write(String(i));
-  console.error('%d %j', i, ret);
+  console.error(`${i} ${ret}`);
 
   // return false when i hits 10
   assert.strictEqual(ret, i !== 10);

test/parallel/test-file-write-stream3.js

@@ -42,8 +42,8 @@ const fileDataExpected_3 = 'abcdefghij\u2026\u2026qrstuvwxyz';
 process.on('exit', function() {
   if (cb_occurred !== cb_expected) {
     console.log('  Test callback events missing or out of order:');
-    console.log('    expected: %j', cb_expected);
-    console.log('    occurred: %j', cb_occurred);
+    console.log(`    expected: ${cb_expected}`);
+    console.log(`    occurred: ${cb_occurred}`);
     assert.strictEqual(
       cb_occurred, cb_expected,
       `events missing or out of order: "${cb_occurred}" !== "${cb_expected}"`);

test/parallel/test-fs-read-stream-fd-leak.js

@@ -24,7 +24,7 @@ fs.close = function() {
 };
 
 function testLeak(endFn, callback) {
-  console.log('testing for leaks from fs.createReadStream().%s()...', endFn);
+  console.log(`testing for leaks from fs.createReadStream().${endFn}()...`);
 
   let i = 0;
   let check = 0;

test/parallel/test-fs-write-string-coerce.js

@@ -19,8 +19,8 @@ fs.open(fn, 'w', 0o644, common.mustCall(function(err, fd) {
     assert.strictEqual(Buffer.byteLength(expected), written);
     fs.closeSync(fd);
     const found = fs.readFileSync(fn, 'utf8');
-    console.log('expected: "%s"', expected);
-    console.log('found: "%s"', found);
+    console.log(`expected: "${expected}"`);
+    console.log(`found: "${found}"`);
     fs.unlinkSync(fn);
     assert.strictEqual(expected, found);
   }));

test/parallel/test-http-client-timeout-agent.js

@@ -90,7 +90,7 @@ server.listen(0, options.host, function() {
 });
 
 process.on('exit', function() {
-  console.error('done=%j sent=%j', requests_done, requests_sent);
+  console.error(`done=${requests_done} sent=${requests_sent}`);
   assert.strictEqual(requests_done, requests_sent,
                      'timeout on http request called too much');
 });

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

@@ -58,19 +58,19 @@ function write(out) {
   // that 'finish' isn't emitted until the stream is fully flushed.
   out.on('finish', function() {
     finishEvent = true;
-    console.error('%s finish event', name);
+    console.error(`${name} finish event`);
     process.nextTick(function() {
       assert(endCb, `${name} got finish event before endcb!`);
-      console.log('ok - %s finishEvent', name);
+      console.log(`ok - ${name} finishEvent`);
     });
   });
 
   out.end(buf, function() {
     endCb = true;
-    console.error('%s endCb', name);
+    console.error(`${name} endCb`);
     process.nextTick(function() {
       assert(finishEvent, `${name} got endCb event before finishEvent!`);
-      console.log('ok - %s endCb', name);
+      console.log(`ok - ${name} endCb`);
     });
   });
 }

test/parallel/test-listen-fd-cluster.js

@@ -85,7 +85,7 @@ function test(cb) {
     conn.end('hello from parent\n');
   }).listen(0, function() {
     const port = this.address().port;
-    console.error('server listening on %d', port);
+    console.error(`server listening on ${port}`);
 
     const spawn = require('child_process').spawn;
     const master = spawn(process.execPath, [__filename, 'master'], {

test/parallel/test-net-server-max-connections.js

@@ -55,7 +55,7 @@ function makeConnection(index) {
     }
 
     c.on('close', function() {
-      console.error('closed %d', index);
+      console.error(`closed ${index}`);
       closes++;
 
       if (closes < N / 2) {
@@ -97,7 +97,7 @@ function makeConnection(index) {
     if (common.isSunOS && (e.code === 'ECONNREFUSED')) {
       c.connect(server.address().port);
     }
-    console.error('error %d: %s', index, e);
+    console.error(`error ${index}: ${e}`);
   });
 }
 

test/parallel/test-process-exit-code.js

@@ -93,7 +93,7 @@ function parent() {
       assert.strictEqual(
         code, exit,
         `wrong exit for ${arg}\nexpected:${exit} but got:${code}`);
-      console.log('ok - %s exited with %d', arg, exit);
+      console.log(`ok - ${arg} exited with ${exit}`);
     });
   };
 

test/parallel/test-punycode.js

@@ -200,10 +200,7 @@ const tests = [
 let errors = 0;
 const handleError = (error, name) => {
   console.error(
-    'FAIL: %s expected %j, got %j',
-    name,
-    error.expected,
-    error.actual
+    `FAIL: ${name} expected ${error.expected}, got ${error.actual}`
   );
   errors++;
 };

test/parallel/test-repl-syntax-error-handling.js

@@ -38,7 +38,7 @@ function parent() {
 
   child.stderr.setEncoding('utf8');
   child.stderr.on('data', function(c) {
-    console.error('%j', c);
+    console.error(`${c}`);
     throw new Error('should not get stderr data');
   });
 

test/parallel/test-stream-unshift-read-race.js

@@ -111,9 +111,9 @@ w.on('finish', common.mustCall(function() {
   // lacking that piece.
   assert.strictEqual(written[0], 'asdfasdfas');
   let asdf = 'd';
-  console.error('0: %s', written[0]);
+  console.error(`0: ${written[0]}`);
   for (let i = 1; i < written.length; i++) {
-    console.error('%s: %s', i.toString(32), written[i]);
+    console.error(`${i.toString(32)}: ${written[i]}`);
     assert.strictEqual(written[i].slice(0, 4), '1234');
     for (let j = 4; j < written[i].length; j++) {
       const c = written[i].charAt(j);

test/parallel/test-stream-writev.js

@@ -45,7 +45,7 @@ function run() {
 }
 
 function test(decode, uncork, multi, next) {
-  console.log('# decode=%j uncork=%j multi=%j', decode, uncork, multi);
+  console.log(`# decode=${decode} uncork=${uncork} multi=${multi}`);
   let counter = 0;
   let expectCount = 0;
   function cnt(msg) {

test/parallel/test-stream2-large-read-stall.js

@@ -43,9 +43,9 @@ r.on('readable', function() {
   console.error('>> readable');
   let ret;
   do {
-    console.error('  > read(%d)', READSIZE);
+    console.error(`  > read(${READSIZE})`);
     ret = r.read(READSIZE);
-    console.error('  < %j (%d remain)', ret && ret.length, rs.length);
+    console.error(`  < ${ret && ret.length} (${rs.length} remain)`);
   } while (ret && ret.length === READSIZE);
 
   console.error('<< after read()',
@@ -68,7 +68,7 @@ function push() {
     return r.push(null);
   }
 
-  console.error('   push #%d', pushes);
+  console.error(`   push #${pushes}`);
   if (r.push(Buffer.allocUnsafe(PUSHSIZE)))
     setTimeout(push, 1);
 }

test/parallel/test-stream2-push.js

@@ -89,7 +89,7 @@ const expectWritten =
     'asdfgasdfgasdfgasdfg' ];
 
 writer._write = function(chunk, encoding, cb) {
-  console.error('WRITE %s', chunk);
+  console.error(`WRITE ${chunk}`);
   written.push(chunk);
   process.nextTick(cb);
 };

test/parallel/test-stream2-readable-non-empty-end.js

@@ -51,7 +51,7 @@ test.on('readable', function() {
   const res = test.read(b);
   if (res) {
     bytesread += res.length;
-    console.error('br=%d len=%d', bytesread, len);
+    console.error(`br=${bytesread} len=${len}`);
     setTimeout(next, 1);
   }
   test.read(0);

test/parallel/test-stream3-pause-then-read.js

@@ -60,7 +60,7 @@ function read100() {
 }
 
 function readn(n, then) {
-  console.error('read %d', n);
+  console.error(`read ${n}`);
   expectEndingData -= n;
   (function read() {
     const c = r.read(n);

test/parallel/test-tls-client-verify.js

@@ -142,6 +142,6 @@ runTest(0);
 
 
 process.on('exit', function() {
-  console.log('successful tests: %d', successfulTests);
+  console.log(`successful tests: ${successfulTests}`);
   assert.strictEqual(successfulTests, testCases.length);
 });

test/parallel/test-tls-pause.js

@@ -57,7 +57,7 @@ server.listen(0, function() {
     function send() {
       console.error('sending');
       const ret = client.write(Buffer.allocUnsafe(bufSize));
-      console.error('write => %j', ret);
+      console.error(`write => ${ret}`);
       if (false !== ret) {
         console.error('write again');
         sent += bufSize;

test/parallel/test-tls-server-verify.js

@@ -259,7 +259,7 @@ function runTest(port, testIndex) {
   const tcase = testCases[testIndex];
   if (!tcase) return;
 
-  console.error(`${prefix}Running '%s'`, tcase.title);
+  console.error(`${prefix}Running '${tcase.title}'`);
 
   const cas = tcase.CAs.map(loadPEM);
 

test/pummel/test-exec.js

@@ -79,7 +79,7 @@ exec('thisisnotavalidcommand', function(err, stdout, stderr) {
 const sleeperStart = new Date();
 exec(SLEEP3_COMMAND, { timeout: 50 }, function(err, stdout, stderr) {
   const diff = (new Date()) - sleeperStart;
-  console.log('\'sleep 3\' with timeout 50 took %d ms', diff);
+  console.log(`'sleep 3' with timeout 50 took ${diff} ms`);
   assert.ok(diff < 500);
   assert.ok(err);
   assert.ok(err.killed);
@@ -94,7 +94,7 @@ const killMeTwice = exec(SLEEP3_COMMAND, { timeout: 1000 },
                          killMeTwiceCallback);
 
 process.nextTick(function() {
-  console.log('kill pid %d', killMeTwice.pid);
+  console.log(`kill pid ${killMeTwice.pid}`);
   // make sure there is no race condition in starting the process
   // the PID SHOULD exist directly following the exec() call.
   assert.strictEqual('number', typeof killMeTwice._handle.pid);
@@ -113,7 +113,7 @@ function killMeTwiceCallback(err, stdout, stderr) {
   assert.strictEqual(stderr, '');
 
   // the timeout should still be in effect
-  console.log('\'sleep 3\' was already killed. Took %d ms', diff);
+  console.log(`'sleep 3' was already killed. Took ${diff} ms`);
   assert.ok(diff < 1500);
 }
 

test/pummel/test-net-write-callbacks.js

@@ -29,7 +29,7 @@ const N = 500000;
 
 const server = net.Server(function(socket) {
   socket.on('data', function(d) {
-    console.error('got %d bytes', d.length);
+    console.error(`got ${d.length} bytes`);
   });
 
   socket.on('end', function() {

test/pummel/test-regress-GH-892.js

@@ -102,11 +102,11 @@ const server = https.Server(serverOptions, function(req, res) {
 });
 
 server.listen(common.PORT, function() {
-  console.log('expecting %d bytes', bytesExpected);
+  console.log(`expecting ${bytesExpected} bytes`);
   makeRequest();
 });
 
 process.on('exit', function() {
-  console.error('got %d bytes', uploadCount);
+  console.error(`got ${uploadCount} bytes`);
   assert.strictEqual(uploadCount, bytesExpected);
 });

test/pummel/test-tls-throttle.js

@@ -72,8 +72,8 @@ server.listen(common.PORT, function() {
 
 
 function displayCounts() {
-  console.log('body.length: %d', body.length);
-  console.log('  recvCount: %d', recvCount);
+  console.log(`body.length: ${body.length}`);
+  console.log(`  recvCount: ${recvCount}`);
 }
 
 

test/pummel/test-vm-memleak.js

@@ -57,6 +57,6 @@ function testContextLeak() {
 }
 
 process.on('exit', function() {
-  console.error('max mem: %dmb', Math.round(maxMem / (1024 * 1024)));
+  console.error(`max mem: ${Math.round(maxMem / (1024 * 1024))}mb`);
   assert.ok(maxMem < 64 * 1024 * 1024);
 });

test/sequential/test-require-cache-without-stat.js

@@ -52,7 +52,7 @@ require('../fixtures/a.js');
 require('./../fixtures/a.js');
 require('http');
 
-console.log('counterBefore = %d', counter);
+console.log(`counterBefore = ${counter}`);
 const counterBefore = counter;
 
 // Now load the module a bunch of times with equivalent paths.
@@ -68,7 +68,7 @@ for (let i = 0; i < 100; i++) {
   require('http');
 }
 
-console.log('counterAfter = %d', counter);
+console.log(`counterAfter = ${counter}`);
 const counterAfter = counter;
 
 assert.strictEqual(counterBefore, counterAfter);

test/sequential/test-stream2-stderr-sync.js

@@ -38,7 +38,7 @@ function parent() {
 
     child.on('close', function() {
       assert.strictEqual(err, `child ${c}\nfoo\nbar\nbaz\n`);
-      console.log('ok %d child #%d', ++i, c);
+      console.log(`ok ${++i} child #${c}`);
       if (i === children.length)
         console.log(`1..${i}`);
     });