From 9ced334a6c04de597507563dae269167c5020730 Mon Sep 17 00:00:00 2001 From: Ruben Bridgewater Date: Sun, 2 Jun 2019 16:07:08 +0200 Subject: [PATCH] util: refactor inspecting long lines Using the `util.inspect` `compact` mode set to something else than `true` resulted in breaking long lines in case the line would exceed the `breakLength` option and if it contained whitespace and or new lines. It turned out that this behavior was less useful than originally expected and it is now changed to only break on line breaks if the `breakLength` option is exceeded for the inspected string. This should be align better with the user expectation than the former behavior. PR-URL: https://github.com/nodejs/node/pull/28055 Fixes: https://github.com/nodejs/node/issues/27690 Reviewed-By: Benjamin Gruenbaum Reviewed-By: Rich Trott --- lib/internal/util/inspect.js | 39 +++---------------- test/parallel/test-util-inspect.js | 62 ++++++++---------------------- 2 files changed, 22 insertions(+), 79 deletions(-) diff --git a/lib/internal/util/inspect.js b/lib/internal/util/inspect.js index 06361156f4ccff..5c58a19c25316b 100644 --- a/lib/internal/util/inspect.js +++ b/lib/internal/util/inspect.js @@ -127,8 +127,6 @@ const numberRegExp = /^(0|[1-9][0-9]*)$/; const coreModuleRegExp = /^ at (?:[^/\\(]+ \(|)((? ctx.breakLength && - value.length > kMinLineLength) { - // Subtract the potential quotes, the space and the plus as well (4). - const rawMaxLineLength = ctx.breakLength - ctx.indentationLvl - 4; - const maxLineLength = Math.max(rawMaxLineLength, kMinLineLength); - const lines = Math.ceil(value.length / maxLineLength); - const averageLineLength = Math.ceil(value.length / lines); - const divisor = Math.max(averageLineLength, kMinLineLength); - if (readableRegExps[divisor] === undefined) { - // Build a new RegExp that naturally breaks text into multiple lines. - // - // Rules - // 1. Greedy match all text up the max line length that ends with a - // whitespace or the end of the string. - // 2. If none matches, non-greedy match any text up to a whitespace or - // the end of the string. - // - // eslint-disable-next-line max-len, node-core/no-unescaped-regexp-dot - readableRegExps[divisor] = new RegExp(`(.|\\n){1,${divisor}}(\\s|$)|(\\n|.)+?(\\s|$)`, 'gm'); - } - const matches = value.match(readableRegExps[divisor]); - if (matches.length > 1) { - const indent = ' '.repeat(ctx.indentationLvl); - let res = `${fn(strEscape(matches[0]), 'string')} +\n`; - const lastIndex = matches.length - 1; - for (let i = 1; i < lastIndex; i++) { - res += `${indent} ${fn(strEscape(matches[i]), 'string')} +\n`; - } - res += `${indent} ${fn(strEscape(matches[lastIndex]), 'string')}`; - return res; - } + value.length > kMinLineLength && + value.length > ctx.breakLength - ctx.indentationLvl - 4) { + return value + .split(/(?<=\n)/) + .map((line) => fn(strEscape(line), 'string')) + .join(` +\n${' '.repeat(ctx.indentationLvl + 2)}`); } return fn(strEscape(value), 'string'); } diff --git a/test/parallel/test-util-inspect.js b/test/parallel/test-util-inspect.js index 45fabf5c286a40..525b97c5e7a09f 100644 --- a/test/parallel/test-util-inspect.js +++ b/test/parallel/test-util-inspect.js @@ -93,7 +93,7 @@ assert.strictEqual(util.inspect(new Date('')), (new Date('')).toString()); assert.strictEqual(util.inspect('\n\u0001'), "'\\n\\u0001'"); assert.strictEqual( util.inspect(`${Array(75).fill(1)}'\n\u001d\n\u0003`), - `"${Array(75).fill(1)}'\\n" +\n '\\u001d\\n\\u0003'` + `"${Array(75).fill(1)}'\\n" +\n '\\u001d\\n' +\n '\\u0003'` ); assert.strictEqual(util.inspect([]), '[]'); assert.strictEqual(util.inspect(Object.create([])), 'Array {}'); @@ -1487,10 +1487,9 @@ util.inspect(process); ' 2,', ' [', ' [', - " 'Lorem ipsum dolor\\nsit amet,\\tconsectetur ' +", - " 'adipiscing elit, sed do eiusmod tempor ' +", - " 'incididunt ut labore et dolore magna ' +", - " 'aliqua.',", + " 'Lorem ipsum dolor\\n' +", + " 'sit amet,\\tconsectetur adipiscing elit, sed do eiusmod " + + "tempor incididunt ut labore et dolore magna aliqua.',", " 'test',", " 'foo'", ' ]', @@ -1507,12 +1506,9 @@ util.inspect(process); out = util.inspect(o.a[2][0][0], { compact: false, breakLength: 30 }); expect = [ - "'Lorem ipsum dolor\\nsit ' +", - " 'amet,\\tconsectetur ' +", - " 'adipiscing elit, sed do ' +", - " 'eiusmod tempor incididunt ' +", - " 'ut labore et dolore magna ' +", - " 'aliqua.'" + "'Lorem ipsum dolor\\n' +", + " 'sit amet,\\tconsectetur adipiscing elit, sed do eiusmod tempor " + + "incididunt ut labore et dolore magna aliqua.'" ].join('\n'); assert.strictEqual(out, expect); @@ -1526,30 +1522,7 @@ util.inspect(process); '12 45 78 01 34 67 90 23 56 89 123456789012345678901234567890', { compact: false, breakLength: 3 }); expect = [ - "'12 45 78 01 34 ' +", - " '67 90 23 56 89 ' +", - " '123456789012345678901234567890'" - ].join('\n'); - assert.strictEqual(out, expect); - - out = util.inspect( - '12 45 78 01 34 67 90 23 56 89 1234567890123 0', - { compact: false, breakLength: 3 }); - expect = [ - "'12 45 78 01 34 ' +", - " '67 90 23 56 89 ' +", - " '1234567890123 0'" - ].join('\n'); - assert.strictEqual(out, expect); - - out = util.inspect( - '12 45 78 01 34 67 90 23 56 89 12345678901234567 0', - { compact: false, breakLength: 3 }); - expect = [ - "'12 45 78 01 34 ' +", - " '67 90 23 56 89 ' +", - " '12345678901234567 ' +", - " '0'" + "'12 45 78 01 34 67 90 23 56 89 123456789012345678901234567890'" ].join('\n'); assert.strictEqual(out, expect); @@ -1588,7 +1561,7 @@ util.inspect(process); o[util.inspect.custom] = () => ({ a: '12 45 78 01 34 67 90 23' }); out = util.inspect(o, { compact: false, breakLength: 3 }); - expect = "{\n a: '12 45 78 01 34 ' +\n '67 90 23'\n}"; + expect = "{\n a: '12 45 78 01 34 67 90 23'\n}"; assert.strictEqual(out, expect); } @@ -2192,16 +2165,13 @@ assert.strictEqual( ' b: {', ' x: 5,', ' c: {', - " x: '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ' +", - " '10000000000000000 00000000000000000 ',", + " x: '10000000000000000 00000000000000000 10000000000000000 " + + '00000000000000000 10000000000000000 00000000000000000 ' + + '10000000000000000 00000000000000000 10000000000000000 ' + + '00000000000000000 10000000000000000 00000000000000000 ' + + '10000000000000000 00000000000000000 10000000000000000 ' + + '00000000000000000 10000000000000000 00000000000000000 ' + + "10000000000000000 00000000000000000 ',", ' d: 2,', ' e: 3', ' }',