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test: add tests for console.[info|error|warn] #6538

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test: add tests for console.[info|error|warn] #6538

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60 changes: 49 additions & 11 deletions test/parallel/test-console.js
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Original file line number Diff line number Diff line change
Expand Up @@ -22,14 +22,18 @@ assert.doesNotThrow(function() {
});

// an Object with a custom .inspect() function
var custom_inspect = { foo: 'bar', inspect: function() { return 'inspect'; } };
const custom_inspect = { foo: 'bar', inspect: () => { return 'inspect'; } };

var stdout_write = global.process.stdout.write;
var strings = [];
const stdout_write = global.process.stdout.write;
const stderr_write = global.process.stderr.write;
const strings = [];
const errStrings = [];
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');
Expand All @@ -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 });
Expand All @@ -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
const timesMapSize = console._times.size;
Expand All @@ -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());
const expectedStrings = [
'foo', 'foo bar', 'foo bar hop', "{ slashes: '\\\\\\\\' }", 'inspect'
];

for (const expected of expectedStrings) {
assert.equal(expected + '\n', strings.shift()); // console.log (stdout)
assert.equal(expected + '\n', errStrings.shift()); // console.error (stderr)
}

for (const expected of expectedStrings) {
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');
Expand Down