Index: node_modules/node-gyp/test/test-find-python.js
===================================================================
--- node_modules/node-gyp/test/test-find-python.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/node-gyp/test/test-find-python.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,226 @@
+'use strict'
+
+delete process.env.PYTHON
+
+const test = require('tap').test
+const findPython = require('../lib/find-python')
+const execFile = require('child_process').execFile
+const PythonFinder = findPython.test.PythonFinder
+
+require('npmlog').level = 'warn'
+
+test('find python', function (t) {
+  t.plan(4)
+
+  findPython.test.findPython(null, function (err, found) {
+    t.strictEqual(err, null)
+    var proc = execFile(found, ['-V'], function (err, stdout, stderr) {
+      t.strictEqual(err, null)
+      t.ok(/Python 3/.test(stdout))
+      t.strictEqual(stderr, '')
+    })
+    proc.stdout.setEncoding('utf-8')
+    proc.stderr.setEncoding('utf-8')
+  })
+})
+
+function poison (object, property) {
+  function fail () {
+    console.error(Error(`Property ${property} should not have been accessed.`))
+    process.abort()
+  }
+  var descriptor = {
+    configurable: false,
+    enumerable: false,
+    get: fail,
+    set: fail
+  }
+  Object.defineProperty(object, property, descriptor)
+}
+
+function TestPythonFinder () {
+  PythonFinder.apply(this, arguments)
+}
+TestPythonFinder.prototype = Object.create(PythonFinder.prototype)
+// Silence npmlog - remove for debugging
+TestPythonFinder.prototype.log = {
+  silly: () => {},
+  verbose: () => {},
+  info: () => {},
+  warn: () => {},
+  error: () => {}
+}
+delete TestPythonFinder.prototype.env.NODE_GYP_FORCE_PYTHON
+
+test('find python - python', function (t) {
+  t.plan(6)
+
+  var f = new TestPythonFinder('python', done)
+  f.execFile = function (program, args, opts, cb) {
+    f.execFile = function (program, args, opts, cb) {
+      poison(f, 'execFile')
+      t.strictEqual(program, '/path/python')
+      t.ok(/sys\.version_info/.test(args[1]))
+      cb(null, '3.9.1')
+    }
+    t.strictEqual(program,
+      process.platform === 'win32' ? '"python"' : 'python')
+    t.ok(/sys\.executable/.test(args[1]))
+    cb(null, '/path/python')
+  }
+  f.findPython()
+
+  function done (err, python) {
+    t.strictEqual(err, null)
+    t.strictEqual(python, '/path/python')
+  }
+})
+
+test('find python - python too old', function (t) {
+  t.plan(2)
+
+  var f = new TestPythonFinder(null, done)
+  f.execFile = function (program, args, opts, cb) {
+    if (/sys\.executable/.test(args[args.length - 1])) {
+      cb(null, '/path/python')
+    } else if (/sys\.version_info/.test(args[args.length - 1])) {
+      cb(null, '2.3.4')
+    } else {
+      t.fail()
+    }
+  }
+  f.findPython()
+
+  function done (err) {
+    t.ok(/Could not find any Python/.test(err))
+    t.ok(/not supported/i.test(f.errorLog))
+  }
+})
+
+test('find python - no python', function (t) {
+  t.plan(2)
+
+  var f = new TestPythonFinder(null, done)
+  f.execFile = function (program, args, opts, cb) {
+    if (/sys\.executable/.test(args[args.length - 1])) {
+      cb(new Error('not found'))
+    } else if (/sys\.version_info/.test(args[args.length - 1])) {
+      cb(new Error('not a Python executable'))
+    } else {
+      t.fail()
+    }
+  }
+  f.findPython()
+
+  function done (err) {
+    t.ok(/Could not find any Python/.test(err))
+    t.ok(/not in PATH/.test(f.errorLog))
+  }
+})
+
+test('find python - no python2, no python, unix', function (t) {
+  t.plan(2)
+
+  var f = new TestPythonFinder(null, done)
+  f.checkPyLauncher = t.fail
+  f.win = false
+
+  f.execFile = function (program, args, opts, cb) {
+    if (/sys\.executable/.test(args[args.length - 1])) {
+      cb(new Error('not found'))
+    } else {
+      t.fail()
+    }
+  }
+  f.findPython()
+
+  function done (err) {
+    t.ok(/Could not find any Python/.test(err))
+    t.ok(/not in PATH/.test(f.errorLog))
+  }
+})
+
+test('find python - no python, use python launcher', function (t) {
+  t.plan(4)
+
+  var f = new TestPythonFinder(null, done)
+  f.win = true
+
+  f.execFile = function (program, args, opts, cb) {
+    if (program === 'py.exe') {
+      t.notEqual(args.indexOf('-3'), -1)
+      t.notEqual(args.indexOf('-c'), -1)
+      return cb(null, 'Z:\\snake.exe')
+    }
+    if (/sys\.executable/.test(args[args.length - 1])) {
+      cb(new Error('not found'))
+    } else if (f.winDefaultLocations.includes(program)) {
+      cb(new Error('not found'))
+    } else if (/sys\.version_info/.test(args[args.length - 1])) {
+      if (program === 'Z:\\snake.exe') {
+        cb(null, '3.9.0')
+      } else {
+        t.fail()
+      }
+    } else {
+      t.fail()
+    }
+  }
+  f.findPython()
+
+  function done (err, python) {
+    t.strictEqual(err, null)
+    t.strictEqual(python, 'Z:\\snake.exe')
+  }
+})
+
+test('find python - no python, no python launcher, good guess', function (t) {
+  t.plan(2)
+
+  var f = new TestPythonFinder(null, done)
+  f.win = true
+  const expectedProgram = f.winDefaultLocations[0]
+
+  f.execFile = function (program, args, opts, cb) {
+    if (program === 'py.exe') {
+      return cb(new Error('not found'))
+    }
+    if (/sys\.executable/.test(args[args.length - 1])) {
+      cb(new Error('not found'))
+    } else if (program === expectedProgram &&
+               /sys\.version_info/.test(args[args.length - 1])) {
+      cb(null, '3.7.3')
+    } else {
+      t.fail()
+    }
+  }
+  f.findPython()
+
+  function done (err, python) {
+    t.strictEqual(err, null)
+    t.ok(python === expectedProgram)
+  }
+})
+
+test('find python - no python, no python launcher, bad guess', function (t) {
+  t.plan(2)
+
+  var f = new TestPythonFinder(null, done)
+  f.win = true
+
+  f.execFile = function (program, args, opts, cb) {
+    if (/sys\.executable/.test(args[args.length - 1])) {
+      cb(new Error('not found'))
+    } else if (/sys\.version_info/.test(args[args.length - 1])) {
+      cb(new Error('not a Python executable'))
+    } else {
+      t.fail()
+    }
+  }
+  f.findPython()
+
+  function done (err) {
+    t.ok(/Could not find any Python/.test(err))
+    t.ok(/not in PATH/.test(f.errorLog))
+  }
+})