test: add tests for console.[info|error|warn]

Just copied the basic tests for log, as they're all the same thing
as log in either stdout or stderr. Cleaned that up a bit.
Also const-ified.
PR-URL: #6538
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: bengl

test/parallel/test-console.js

@@ -22,14 +22,18 @@ assert.doesNotThrow(function() {
 });
 
 // an Object with a custom .inspect() function
-varcustom_inspect={foo: 'bar',inspect: function(){return'inspect';}};
+constcustom_inspect={foo: 'bar',inspect: ()=>{return'inspect';}};
 
-varstdout_write=global.process.stdout.write;
-varstrings=[];
+conststdout_write=global.process.stdout.write;
+conststderr_write=global.process.stderr.write;
+conststrings=[];
+consterrStrings=[];
 global.process.stdout.write=function(string){
 strings.push(string);
 };
-console._stderr=process.stdout;
+global.process.stderr.write=function(string){
+errStrings.push(string);
+};
 
 // test console.log()
 console.log('foo');
@@ -38,6 +42,27 @@ console.log('%s %s', 'foo', 'bar', 'hop');
 console.log({slashes: '\\\\'});
 console.log(custom_inspect);
 
+// test console.info()
+console.info('foo');
+console.info('foo','bar');
+console.info('%s %s','foo','bar','hop');
+console.info({slashes: '\\\\'});
+console.info(custom_inspect);
+
+// test console.error()
+console.error('foo');
+console.error('foo','bar');
+console.error('%s %s','foo','bar','hop');
+console.error({slashes: '\\\\'});
+console.error(custom_inspect);
+
+// test console.warn()
+console.warn('foo');
+console.warn('foo','bar');
+console.warn('%s %s','foo','bar','hop');
+console.warn({slashes: '\\\\'});
+console.warn(custom_inspect);
+
 // test console.dir()
 console.dir(custom_inspect);
 console.dir(custom_inspect,{showHidden: false});
@@ -60,6 +85,7 @@ console.time('hasOwnProperty');
 console.timeEnd('hasOwnProperty');
 
 global.process.stdout.write=stdout_write;
+global.process.stderr.write=stderr_write;
 
 // verify that console.timeEnd() doesn't leave dead links
 consttimesMapSize=console._times.size;
@@ -71,22 +97,34 @@ console.timeEnd('label2');
 console.timeEnd('label3');
 assert.strictEqual(console._times.size,timesMapSize);
 
-assert.equal('foo\n',strings.shift());
-assert.equal('foo bar\n',strings.shift());
-assert.equal('foo bar hop\n',strings.shift());
-assert.equal("{ slashes: '\\\\\\\\' }\n",strings.shift());
-assert.equal('inspect\n',strings.shift());
+constexpectedStrings=[
+'foo','foo bar','foo bar hop',"{ slashes: '\\\\\\\\' }",'inspect'
+];
+
+for(constexpectedofexpectedStrings){
+assert.equal(expected+'\n',strings.shift());// console.log (stdout)
+assert.equal(expected+'\n',errStrings.shift());// console.error (stderr)
+}
+
+for(constexpectedofexpectedStrings){
+assert.equal(expected+'\n',strings.shift());// console.info (stdout)
+assert.equal(expected+'\n',errStrings.shift());// console.warn (stderr)
+}
+
 assert.equal("{ foo: 'bar', inspect: [Function] }\n",strings.shift());
 assert.equal("{ foo: 'bar', inspect: [Function] }\n",strings.shift());
 assert.notEqual(-1,strings.shift().indexOf('foo: [Object]'));
 assert.equal(-1,strings.shift().indexOf('baz'));
-assert.equal('Trace: This is a {"formatted":"trace"} 10 foo',
-strings.shift().split('\n').shift());
 assert.ok(/^label:\d+\.\d{3}ms$/.test(strings.shift().trim()));
 assert.ok(/^__proto__:\d+\.\d{3}ms$/.test(strings.shift().trim()));
 assert.ok(/^constructor:\d+\.\d{3}ms$/.test(strings.shift().trim()));
 assert.ok(/^hasOwnProperty:\d+\.\d{3}ms$/.test(strings.shift().trim()));
+
+assert.equal('Trace: This is a {"formatted":"trace"} 10 foo',
+errStrings.shift().split('\n').shift());
+
 assert.equal(strings.length,0);
+assert.equal(errStrings.length,0);
 
 assert.throws(()=>{
 console.assert(false,'should throw');