build: use nyc for coverage testing

.eslintignore

@@ -1,2 +1,3 @@
+.nyc_output
 coverage
 node_modules

.gitignore

@@ -1,3 +1,4 @@
+.nyc_output/
 coverage/
 node_modules/
 npm-debug.log

.travis.yml

@@ -48,18 +48,27 @@ before_install:
     elif [[ "$(cut -d. -f1 <<< "$TRAVIS_NODE_VERSION")" -lt 10 ]]; then
       npm install --save-dev mocha@7.2.0
     fi
-  - |
-    # istanbul for coverage
-    # - remove for Node.js < 0.10
-    if [[ "$(cut -d. -f1 <<< "$TRAVIS_NODE_VERSION")" -eq 0 && "$(cut -d. -f2 <<< "$TRAVIS_NODE_VERSION")" -lt 10 ]]; then
-      npm rm --silent --save-dev istanbul
-    fi
   - |
     # browserify for browser testing
     # - install for Node.js > 0.8
     if [[ "$(cut -d. -f1 <<< "$TRAVIS_NODE_VERSION")" -gt 0 || "$(cut -d. -f2 <<< "$TRAVIS_NODE_VERSION")" -gt 8 ]]; then
       npm install --silent --save-dev browserify
     fi
+  - |
+    # nyc for coverage
+    # - remove for Node.js < 0.10
+    # - use 10.x for Node.js < 4
+    # - use 11.x for Node.js < 6
+    # - use 14.x for Node.js < 8
+    if [[ "$(cut -d. -f1 <<< "$TRAVIS_NODE_VERSION")" -eq 0 && "$(cut -d. -f2 <<< "$TRAVIS_NODE_VERSION")" -lt 10 ]]; then
+      npm rm --save-dev nyc
+    elif [[ "$(cut -d. -f1 <<< "$TRAVIS_NODE_VERSION")" -lt 4 ]]; then
+      npm install --save-dev nyc@10.3.2
+    elif [[ "$(cut -d. -f1 <<< "$TRAVIS_NODE_VERSION")" -lt 6 ]]; then
+      npm install --save-dev nyc@11.9.0
+    elif [[ "$(cut -d. -f1 <<< "$TRAVIS_NODE_VERSION")" -lt 8 ]]; then
+      npm install --save-dev nyc@14.1.1
+    fi
   - |
     # eslint for linting
     # - remove on Node.js < 8
@@ -79,7 +88,7 @@ before_install:
 script:
   # Run test script
   - |
-    if npm -ps ls istanbul | grep -q istanbul; then
+    if npm -ps ls nyc | grep -q nyc; then
       npm run test-ci
     else
       npm test
@@ -92,7 +101,7 @@ script:
 after_script:
   - |
     # Upload coverage to coveralls
-    if [[ -f ./coverage/lcov.info ]]; then
+    if [[ -d .nyc_output ]]; then
       npm install --save-dev coveralls@2.10.0
-      coveralls < ./coverage/lcov.info
+      nyc report --reporter=text-lcov | coveralls
     fi

appveyor.yml

@@ -37,7 +37,7 @@ install:
       # Remove benchmark dependencies
       npm rm --silent --save-dev benchmark beautify-benchmark
       # Remove coverage dependency
-      npm rm --silent --save-dev istanbul
+      npm rm --silent --save-dev nyc
       # Remove lint dependencies
       cmd.exe /c "node -pe `"Object.keys(require('./package').devDependencies).join('\n')`"" | `
         sls "^eslint(-|$)" | `

package.json

@@ -20,10 +20,9 @@
     "eslint-plugin-node": "9.2.0",
     "eslint-plugin-promise": "4.2.1",
     "eslint-plugin-standard": "4.0.1",
-    "istanbul": "0.4.5",
+    "nyc": "15.1.0",
     "mocha": "8.0.1",
-    "safe-buffer": "5.1.2",
-    "uid-safe": "2.1.5"
+    "safe-buffer": "5.1.2"
   },
   "files": [
     "lib/",
@@ -39,7 +38,7 @@
     "bench": "node benchmark/index.js",
     "lint": "eslint --plugin markdown --ext js,md .",
     "test": "mocha --reporter spec --bail test/",
-    "test-ci": "istanbul cover --print=none node_modules/mocha/bin/_mocha -- --reporter spec test/ && istanbul report lcovonly text-summary",
-    "test-cov": "istanbul cover --print=none node_modules/mocha/bin/_mocha -- --reporter dot test/ && istanbul report lcov text-summary"
+    "test-ci": "nyc --reporter=text npm test",
+    "test-cov": "nyc --reporter=html --reporter=text npm test"
   }
 }

test/test.js

@@ -9,7 +9,6 @@ var path = require('path')
 var script = path.join(__dirname, 'fixtures', 'script.js')
 var spawn = require('child_process').spawn
 var strictlib = libs.strict
-var uid = require('uid-safe').sync
 
 describe('depd(namespace)', function () {
   it('creates deprecated function', function () {
@@ -761,11 +760,7 @@ function captureChildStderr (script, opts, callback) {
   var env = { PATH: process.env.PATH }
   var exec = process.execPath
 
-  var args = process.env.running_under_istanbul
-    ? opts.concat(path.join(__dirname, '..', 'node_modules', 'istanbul', 'lib', 'cli.js'),
-      'cover', '--dir=./coverage/child-' + uid(8), '--print=none', script)
-    : opts.concat(script)
-
+  var args = opts.concat(script)
   var proc = spawn(exec, args, {
     env: env
   })