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console: add console.count() and console.clear()
Both are simple utility functions defined by the WHATWG console spec (https://console.spec.whatwg.org/). PR-URL: #12678 Ref: #12675 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com> Reviewed-By: Timothy Gu <timothygu99@gmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de>
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Original file line number | Diff line number | Diff line change |
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'use strict'; | ||
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require('../common'); | ||
const assert = require('assert'); | ||
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const stdoutWrite = process.stdout.write; | ||
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// The sequence for moving the cursor to 0,0 and clearing screen down | ||
const check = '\u001b[1;1H\u001b[0J'; | ||
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function doTest(isTTY, check) { | ||
let buf = ''; | ||
process.stdout.isTTY = isTTY; | ||
process.stdout.write = (string) => buf += string; | ||
console.clear(); | ||
process.stdout.write = stdoutWrite; | ||
assert.strictEqual(buf, check); | ||
} | ||
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// Fake TTY | ||
doTest(true, check); | ||
doTest(false, ''); |
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Original file line number | Diff line number | Diff line change |
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'use strict'; | ||
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require('../common'); | ||
const assert = require('assert'); | ||
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const stdoutWrite = process.stdout.write; | ||
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let buf = ''; | ||
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process.stdout.write = (string) => buf = string; | ||
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console.count(); | ||
assert.strictEqual(buf, 'default: 1\n'); | ||
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// 'default' and undefined are equivalent | ||
console.count('default'); | ||
assert.strictEqual(buf, 'default: 2\n'); | ||
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console.count('a'); | ||
assert.strictEqual(buf, 'a: 1\n'); | ||
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console.count('b'); | ||
assert.strictEqual(buf, 'b: 1\n'); | ||
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console.count('a'); | ||
assert.strictEqual(buf, 'a: 2\n'); | ||
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console.count(); | ||
assert.strictEqual(buf, 'default: 3\n'); | ||
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console.count({}); | ||
assert.strictEqual(buf, '[object Object]: 1\n'); | ||
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console.count(1); | ||
assert.strictEqual(buf, '1: 1\n'); | ||
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console.count(null); | ||
assert.strictEqual(buf, 'null: 1\n'); | ||
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console.count('null'); | ||
assert.strictEqual(buf, 'null: 2\n'); | ||
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console.countReset(); | ||
console.count(); | ||
assert.strictEqual(buf, 'default: 1\n'); | ||
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console.countReset('a'); | ||
console.count('a'); | ||
assert.strictEqual(buf, 'a: 1\n'); | ||
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// countReset('a') only reset the a counter | ||
console.count(); | ||
assert.strictEqual(buf, 'default: 2\n'); | ||
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process.stdout.write = stdoutWrite; | ||
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// Symbol labels do not work | ||
assert.throws( | ||
() => console.count(Symbol('test')), | ||
/^TypeError: Cannot convert a Symbol value to a string$/); | ||
assert.throws( | ||
() => console.countReset(Symbol('test')), | ||
/^TypeError: Cannot convert a Symbol value to a string$/); |