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JavaScript

'use strict'
delete process.env.PYTHON
const { describe, it } = require('mocha')
const assert = require('assert')
const findPython = require('../lib/find-python')
const execFile = require('child_process').execFile
const PythonFinder = findPython.test.PythonFinder
require('npmlog').level = 'warn'
describe('find-python', function () {
it('find python', function () {
findPython.test.findPython(null, function (err, found) {
assert.strictEqual(err, null)
var proc = execFile(found, ['-V'], function (err, stdout, stderr) {
assert.strictEqual(err, null)
assert.ok(/Python 3/.test(stdout))
assert.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
it('find python - python', function () {
var f = new TestPythonFinder('python', done)
f.execFile = function (program, args, opts, cb) {
f.execFile = function (program, args, opts, cb) {
poison(f, 'execFile')
assert.strictEqual(program, '/path/python')
assert.ok(/sys\.version_info/.test(args[1]))
cb(null, '3.9.1')
}
assert.strictEqual(program,
process.platform === 'win32' ? '"python"' : 'python')
assert.ok(/sys\.executable/.test(args[1]))
cb(null, '/path/python')
}
f.findPython()
function done (err, python) {
assert.strictEqual(err, null)
assert.strictEqual(python, '/path/python')
}
})
it('find python - python too old', function () {
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 {
assert.fail()
}
}
f.findPython()
function done (err) {
assert.ok(/Could not find any Python/.test(err))
assert.ok(/not supported/i.test(f.errorLog))
}
})
it('find python - no python', function () {
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 {
assert.fail()
}
}
f.findPython()
function done (err) {
assert.ok(/Could not find any Python/.test(err))
assert.ok(/not in PATH/.test(f.errorLog))
}
})
it('find python - no python2, no python, unix', function () {
var f = new TestPythonFinder(null, done)
f.checkPyLauncher = assert.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 {
assert.fail()
}
}
f.findPython()
function done (err) {
assert.ok(/Could not find any Python/.test(err))
assert.ok(/not in PATH/.test(f.errorLog))
}
})
it('find python - no python, use python launcher', function () {
var f = new TestPythonFinder(null, done)
f.win = true
f.execFile = function (program, args, opts, cb) {
if (program === 'py.exe') {
assert.notStrictEqual(args.indexOf('-3'), -1)
assert.notStrictEqual(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 {
assert.fail()
}
} else {
assert.fail()
}
}
f.findPython()
function done (err, python) {
assert.strictEqual(err, null)
assert.strictEqual(python, 'Z:\\snake.exe')
}
})
it('find python - no python, no python launcher, good guess', function () {
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 {
assert.fail()
}
}
f.findPython()
function done (err, python) {
assert.strictEqual(err, null)
assert.ok(python === expectedProgram)
}
})
it('find python - no python, no python launcher, bad guess', function () {
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 {
assert.fail()
}
}
f.findPython()
function done (err) {
assert.ok(/Could not find any Python/.test(err))
assert.ok(/not in PATH/.test(f.errorLog))
}
})
})