diff --git a/index.js b/index.js index 4db27a7d..2a000be8 100644 --- a/index.js +++ b/index.js @@ -1,5 +1,5 @@ const V8ToIstanbul = require('./lib/v8-to-istanbul') -module.exports = function (path, wrapperLength, sources, excludePath) { - return new V8ToIstanbul(path, wrapperLength, sources, excludePath) +module.exports = function (path, wrapperLength, sources, excludePath, plugin) { + return new V8ToIstanbul(path, wrapperLength, sources, excludePath, plugin) } diff --git a/lib/plugin.js b/lib/plugin.js new file mode 100644 index 00000000..8bea4399 --- /dev/null +++ b/lib/plugin.js @@ -0,0 +1,36 @@ +const esbuild = require('esbuild') +const vlq = require('vlq') + +module.exports = function (source, path) { + let result + try { + const loader = path.endsWith('.tsx') || path.endsWith('.jsx') ? { loader: 'tsx', jsx: 'preserve' } : {} + result = esbuild.transformSync(source.sourceRaw, { + sourcemap: 'external', + loader: 'ts', + minify: false, + minifyWhitespace: false, + minifySyntax: false, + legalComments: 'none', + ...loader + }) + } catch (err) { + console.error(`${path} parsed with error ${err.message}`) + return + } + const mappings = JSON.parse(result.map).mappings + if (mappings) { + let start = 0 + const executableLines = mappings.split(';').reduce((set, str) => { + start = str.split(',').reduce((number, seg) => { + const [, , line] = vlq.decode(seg) + set.add(number + line) + return number + line + }, start) + return set + }, new Set()) + source.lines.forEach((line, index) => { + line.ignore = line.ignore || !executableLines.has(index) + }) + } +} diff --git a/lib/source.js b/lib/source.js index d8ebc215..c2306853 100644 --- a/lib/source.js +++ b/lib/source.js @@ -4,6 +4,7 @@ const { originalPositionFor, generatedPositionFor, GREATEST_LOWER_BOUND, LEAST_U module.exports = class CovSource { constructor (sourceRaw, wrapperLength) { + this.sourceRaw = sourceRaw sourceRaw = sourceRaw ? sourceRaw.trimEnd() : '' this.lines = [] this.eof = sourceRaw.length diff --git a/lib/v8-to-istanbul.js b/lib/v8-to-istanbul.js index f8c2e1fd..265a1a73 100644 --- a/lib/v8-to-istanbul.js +++ b/lib/v8-to-istanbul.js @@ -25,12 +25,13 @@ const isNode8 = /^v8\./.test(process.version) const cjsWrapperLength = isOlderNode10 ? require('module').wrapper[0].length : 0 module.exports = class V8ToIstanbul { - constructor (scriptPath, wrapperLength, sources, excludePath) { + constructor (scriptPath, wrapperLength, sources, excludePath, plugin) { assert(typeof scriptPath === 'string', 'scriptPath must be a string') assert(!isNode8, 'This module does not support node 8 or lower, please upgrade to node 10') this.path = parsePath(scriptPath) this.wrapperLength = wrapperLength === undefined ? cjsWrapperLength : wrapperLength this.excludePath = excludePath || (() => false) + this.plugin = plugin this.sources = sources || {} this.generatedLines = [] this.branches = {} @@ -260,6 +261,10 @@ module.exports = class V8ToIstanbul { return } + if (this.plugin) { + this.plugin(source, resolvedPath) + } + return { [resolvedPath]: { path: resolvedPath, @@ -282,7 +287,7 @@ module.exports = class V8ToIstanbul { } source.lines.forEach((line, index) => { if (line.ignore) { - return; + return } statements.statementMap[`${index}`] = line.toIstanbul() statements.s[`${index}`] = line.count diff --git a/package-lock.json b/package-lock.json index cd2fbc16..c6aad8c6 100644 --- a/package-lock.json +++ b/package-lock.json @@ -11,7 +11,8 @@ "dependencies": { "@jridgewell/trace-mapping": "^0.3.12", "@types/istanbul-lib-coverage": "^2.0.1", - "convert-source-map": "^2.0.0" + "convert-source-map": "^2.0.0", + "vlq": "^2.0.4" }, "devDependencies": { "@types/node": "^20.0.0", @@ -24,6 +25,9 @@ }, "engines": { "node": ">=10.12.0" + }, + "optionalDependencies": { + "esbuild": "^0.20.1" } }, "node_modules/@aashutoshrathi/word-wrap": { @@ -526,6 +530,351 @@ "integrity": "sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==", 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100644 --- a/package.json +++ b/package.json @@ -27,7 +27,8 @@ "dependencies": { "@jridgewell/trace-mapping": "^0.3.12", "@types/istanbul-lib-coverage": "^2.0.1", - "convert-source-map": "^2.0.0" + "convert-source-map": "^2.0.0", + "vlq": "^2.0.4" }, "devDependencies": { "@types/node": "^20.0.0", @@ -38,6 +39,9 @@ "standard": "^17.0.0", "tap": "^16.0.0" }, + "optionalDependencies": { + "esbuild": "^0.20.1" + }, "engines": { "node": ">=10.12.0" }, diff --git a/test/fixtures/scripts/ignore lines.tsx b/test/fixtures/scripts/ignore lines.tsx new file mode 100644 index 00000000..a55801a8 --- /dev/null +++ b/test/fixtures/scripts/ignore lines.tsx @@ -0,0 +1,10 @@ +// The "tsx" loader removes type annotations +export type NamesProps = { names?: string[] } + +export const NamesComponent = (props: NamesProps) => { + // The "?." operator will be transformed for ES6 + const names = props.names?.join(' ') + + // The "tsx" loader transforms JSX syntax into JS + return
Names: {names}
+} diff --git a/test/v8-to-istanbul.js b/test/v8-to-istanbul.js index 591921eb..415af75f 100644 --- a/test/v8-to-istanbul.js +++ b/test/v8-to-istanbul.js @@ -8,6 +8,7 @@ const crypto = require('crypto') const os = require('os') const sourcemap = require('source-map') const assert = require('assert') +const plugin = require('../lib/plugin') require('tap').mochaGlobals() @@ -295,6 +296,25 @@ ${'//'}${'#'} sourceMappingURL=data:application/json;base64,${base64Sourcemap} }) }) + it('empty coverage for tsx files with plugin', async () => { + const filename = require.resolve('./fixtures/scripts/ignore lines.tsx') + const plugin = require('../lib/plugin') + const v8ToIstanbul = new V8ToIstanbul(filename,undefined, undefined,undefined, plugin) + + await v8ToIstanbul.load() + v8ToIstanbul.applyCoverage([{ + functionName: '(empty-report)', + ranges: [{ + startOffset: 0, + endOffset: lstatSync(filename).size, + count: 0 + }], + isBlockCoverage: true, + }]) + + v8ToIstanbul.toIstanbul()[filename].s.should.eql({ 3: 0, 5: 0, 8: 0, 9: 0 }) + }) + // execute JavaScript files in fixtures directory; these // files contain the raw v8 output along with a set of // assertions. the original scripts can be found in the