track coverage for borp

Signed-off-by: Matteo Collina <hello@matteocollina.com>

borp.js

@@ -23,7 +23,8 @@ const args = parseArgs({
     watch: { type: 'boolean', short: 'w' },
     pattern: { type: 'string', short: 'p' },
     concurrency: { type: 'string', short: 'c' },
-    coverage: { type: 'boolean', short: 'C' }
+    coverage: { type: 'boolean', short: 'C' },
+    'coverage-exclude': { type: 'string', short: 'X' }
   },
   allowPositionals: true
 })
@@ -32,7 +33,6 @@ if (args.values.concurrency) {
   args.values.concurrency = parseInt(args.values.concurrency)
 }
 
-
 let covDir
 if (args.values.coverage) {
   covDir = await mkdtemp(join(process.cwd(), 'coverage-'))
@@ -53,12 +53,19 @@ stream.compose(reporter).pipe(process.stdout)
 await finished(stream)
 
 if (covDir) {
-  const report = Report({
-    reporter: ['text'],
-    tempDirectory: covDir
-  })
-
   try {
+    let exclude = [
+      ...(args.values['coverage-exclude'] || '').split(',')
+    ].filter(Boolean)
+    if (exclude.length === 0) {
+      exclude = undefined
+    }
+    const report = Report({
+      reporter: ['text'],
+      tempDirectory: covDir,
+      exclude
+    })
+
     await report.run()
   } catch (err) {
     console.error(err)

lib/run.js

@@ -3,7 +3,7 @@ import { glob } from 'glob'
 import { findUp } from 'find-up'
 import { createRequire } from 'node:module'
 import { resolve, join, dirname } from 'node:path'
-import { access, readFile, mkdtemp } from 'node:fs/promises'
+import { access, readFile } from 'node:fs/promises'
 import { execa } from 'execa'
 
 async function isFileAccessible (filename, directory) {
@@ -17,7 +17,7 @@ async function isFileAccessible (filename, directory) {
 }
 
 export default async function runWithTypeScript (config) {
-  const { cwd, coverage } = config
+  const { cwd } = config
   const tsconfigPath = await findUp('tsconfig.json', { cwd })
 
   let prefix = ''

package.json

@@ -5,7 +5,7 @@
   "description": "node:test wrapper with TypeScript support",
   "main": "borp.js",
   "scripts": {
-    "test": "rm -rf fixtures/*/dist && standard | snazzy && ./borp.js"
+    "test": "rm -rf fixtures/*/dist && standard | snazzy && ./borp.js --concurrency=1 --coverage --coverage-exclude 'fixtures/**/*,test/**/*'"
   },
   "keywords": [],
   "author": "Matteo Collina <hello@matteocollina.com>",

test/coverage.test.js

@@ -0,0 +1,19 @@
+import { test } from 'node:test'
+import { match } from 'node:assert'
+import { execa } from 'execa'
+import { join } from 'desm'
+
+const borp = join(import.meta.url, '..', 'borp.js')
+
+test('coverage', async () => {
+  const res = await execa('node', [
+    borp,
+    '--coverage'
+  ], {
+    cwd: join(import.meta.url, '..', 'fixtures', 'ts-esm')
+  })
+
+  match(res.stdout, /% Stmts/)
+  match(res.stdout, /All files/)
+  match(res.stdout, /add\.ts/)
+})