fix: support file:// protocol seen in node14 ESM modules

index.js

@@ -284,7 +284,7 @@ module.exports = function stackman (opts) {
       properties.getFileName = {
         writable: true,
         value: function () {
-          var filename = getFileName.call(callsite)
+          var filename = getFileName.call(callsite).replace(/^file:\/\//, '')
           var sourceFile = getPosition().source
           if (!sourceFile) return filename
           var sourceDir = path.dirname(filename)
@@ -303,6 +303,13 @@ module.exports = function stackman (opts) {
           return getPosition().column || getColumnNumber.call(callsite)
         }
       }
+    } else {
+      properties.getFileName = {
+        writable: true,
+        value: function () {
+          return getFileName.call(callsite).replace(/^file:\/\//, '')
+        }
+      }
     }
 
     Object.defineProperties(callsite, properties)

package.json

@@ -17,7 +17,9 @@
     "tape": "^4.13.2"
   },
   "scripts": {
-    "test": "standard && node test/strict.js && node test/non-strict.js && node test/longjohn.js && node test/sourcemap.js"
+    "test": "node test/strict.js && node test/non-strict.js && node test/longjohn.js && node test/sourcemap.js && node test/esm.mjs",
+    "posttest": "npm run lint",
+    "lint": "standard"
   },
   "repository": {
     "type": "git",

test/esm.mjs

@@ -0,0 +1,32 @@
+import test from 'tape'
+import createStackman from '../index.js'
+
+const stackman = createStackman()
+
+test('callsite.getRelativeFileName()', function (t) {
+  var err = new Error('foo')
+  stackman.callsites(err, function (err, callsites) {
+    t.error(err)
+    t.equal(callsites[0].getRelativeFileName(), 'test/esm.mjs')
+    t.end()
+  })
+})
+
+test('callsite.sourceContext()', function (t) {
+  var err = new Error()
+  stackman.callsites(err, function (err, callsites) {
+    t.error(err)
+
+    callsites[0].sourceContext(function (err, context) {
+      t.error(err)
+      t.equal(typeof context, 'object')
+      t.equal(typeof context.line, 'string')
+      t.ok(Array.isArray(context.pre), 'should be an array')
+      t.ok(Array.isArray(context.post), 'should be an array')
+      t.equal(context.pre.length, 2)
+      t.equal(context.post.length, 2)
+      t.equal(context.line.trim(), 'var err = new Error()')
+      t.end()
+    })
+  })
+})