python-shell/test/test-python-shell.ts at master · ishandutta2007/python-shell · GitHub

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import * as should from 'should';

import { PythonShell } from '..';

import { sep, join } from 'path';

import { EOL as newline } from 'os';

import { chdir, cwd } from 'process';

describe('PythonShell', function () {

const pythonFolder = 'test/python';

PythonShell.defaultOptions = {

scriptPath: pythonFolder,

};

describe('#ctor(script, options)', function () {

it('should spawn a Python process', function (done) {

// spawning python might take a while for the first time

// after this python should be in memory and not need extra time for startup

this.timeout(3000);

let pyshell = new PythonShell('exit-code.py');

pyshell.command.should.eql([

'test' + sep + 'python' + sep + 'exit-code.py',

]);

pyshell.terminated.should.be.false;

pyshell.end(function (err) {

if (err) return done(err);

pyshell.terminated.should.be.true;

done();

});

it('should spawn a Python process even if scriptPath option is not specified', function (done) {

let originalDirectory = cwd();

PythonShell.defaultOptions = {};

chdir(join(__dirname, 'python'));

let pyshell = new PythonShell('exit-code.py');

pyshell.command.should.eql(['exit-code.py']);

pyshell.terminated.should.be.false;

pyshell.end(function (err) {

if (err) return done(err);

pyshell.terminated.should.be.true;

done();

});

//reset values to intial status

PythonShell.defaultOptions = {

scriptPath: pythonFolder,

};

chdir(originalDirectory);

});

// executing python-shell with a absolute path is tested in runString suite

it('should spawn a Python process with options', function (done) {

let pyshell = new PythonShell('exit-code.py', {

pythonOptions: ['-u'],

});

pyshell.command.should.eql([

'-u',

'test' + sep + 'python' + sep + 'exit-code.py',

]);

pyshell.end(done);

});

it('should fail to spawn python with bad path', function (done) {

let pyshell = new PythonShell('exit-code.py', {

pythonPath: 'foeisjofseij',

});

pyshell.on('error', (err) => {

err.code.should.eql('ENOENT');

done();

});

it('should spawn a Python process with script arguments', function (done) {

let pyshell = new PythonShell('echo_args.py', {

args: ['hello', 'world'],

});

pyshell.command.should.eql([

'test' + sep + 'python' + sep + 'echo_args.py',

'hello',

'world',

]);

pyshell.end(done);

});

describe('#checkSyntax(code:string)', function () {

// note checkSyntax is a wrapper around checkSyntaxFile

// so this tests checkSyntaxFile as well

it('should check syntax', function (done) {

PythonShell.checkSyntax('x=1').then(() => {

done();

});

it('should invalidate bad syntax', function (done) {

PythonShell.checkSyntax('x=').catch(() => {

done();

});

// #158 these tests are failing on appveyor windows node 8/10 python 2/3

// but they work locally on my windows machine .....

// these methods are not that important so just commenting out tests untill someone fixes them

// describe("#getVersion", function(){

// it('should return a string', function(done){

// PythonShell.getVersion().then((out)=>{

// const version = out.stdout

// version.should.be.a.String();

// version.length.should.be.greaterThan(0)

// done()

// })

// describe("#getVersionSync", function(){

// it('should return a string', function(){

// const version = PythonShell.getVersionSync()

// version.should.be.a.String();

// version.length.should.be.greaterThan(0)

// })

describe('#runString(script, options)', function () {

before(() => {

PythonShell.defaultOptions = {};

});

it('should be able to execute a string of python code', function (done) {

PythonShell.runString('print("hello");print("world")', null).then(

(results) => {

results.should.be.an.Array().and.have.lengthOf(2);

results.should.eql(['hello', 'world']);

done();

);

});

it('should be able to execute a string of python code using promises', async function () {

let results = await PythonShell.runString(

'print("hello");print("world")',

);

results.should.be.an.Array().and.have.lengthOf(2);

results.should.eql(['hello', 'world']);

});

it('should be able to execute a string of python code async', async function () {

let results = await PythonShell.runString(

'print("hello");print("world")',

);

results.should.be.an.Array().and.have.lengthOf(2);

results.should.eql(['hello', 'world']);

});

after(() => {

PythonShell.defaultOptions = {

// reset to match initial value

scriptPath: pythonFolder,

};

});

describe('#run(script, options)', function () {

it('should run the script and return output data using callbacks', function (done) {

PythonShell.run('echo_args.py', {

args: ['hello', 'world'],

}).then((results) => {

results.should.be.an.Array().and.have.lengthOf(2);

results.should.eql(['hello', 'world']);

done();

});

it('should run the script and return output data async', async function () {

let results = await PythonShell.run('echo_args.py', {

args: ['hello', 'world'],

});

results.should.be.an.Array().and.have.lengthOf(2);

results.should.eql(['hello', 'world']);

});

it('should try to run the script and fail appropriately', function (done) {

PythonShell.run('unknown_script.py', null).catch((err) => {

err.should.be.an.Error;

err.exitCode.should.be.exactly(2);

done();

});

it('should try to run the script and fail appropriately - async', async function () {

try {

let results = await PythonShell.run('unknown_script.py');

throw new Error(

`should not get here because the script should fail` + results,

);

} catch (err) {

err.should.be.an.Error;

err.exitCode.should.be.exactly(2);

}

});

it('should include both output and error', function (done) {

PythonShell.run('echo_hi_then_error.py', null)

.then((results) => {

done('Error: This promise should never successfully resolve');

})

.catch((err) => {

err.logs.should.eql(['hi']);

err.should.be.an.Error;

done();

});

it('should run the script and fail with an extended stack trace', function (done) {

PythonShell.run('error.py', null).catch((err) => {

err.should.be.an.Error;

err.exitCode.should.be.exactly(1);

err.stack.should.containEql('----- Python Traceback -----');

done();

});

it('should run the script and fail with an extended stack trace even when mode is binary', function (done) {

PythonShell.run('error.py', { mode: 'binary' }).catch((err) => {

err.should.be.an.Error;

err.exitCode.should.be.exactly(1);

err.stack.should.containEql('----- Python Traceback -----');

done();

});

it('should run multiple scripts and fail with an extended stack trace for each of them', function (done) {

let numberOfTimesToRun = 5;

for (let i = 0; i < numberOfTimesToRun; i++) {

runSingleErrorScript(end);

}

let count = 0;

function end() {

count++;

if (count === numberOfTimesToRun) {

done();

}

function runSingleErrorScript(callback) {

PythonShell.run('error.py', null).catch((err) => {

err.should.be.an.Error;

err.exitCode.should.be.exactly(1);

err.stack.should.containEql('----- Python Traceback -----');

callback();

});

}

});

it('should run multiple scripts and return output data for each of them', function (done) {

let numberOfTimesToRun = 5;

for (let i = 0; i < numberOfTimesToRun; i++) {

runSingleScript(end);

}

let count = 0;

function end() {

count++;

if (count === numberOfTimesToRun) {

done();

}

function runSingleScript(callback) {

PythonShell.run('echo_args.py', {

args: ['hello', 'world'],

}).then((results) => {

results.should.be.an.Array().and.have.lengthOf(2);

results.should.eql(['hello', 'world']);

callback();

});

}

});

it('should be able to run modules', function (done) {

PythonShell.defaultOptions = {};

PythonShell.run('-m', {

args: ['timeit', '-n 1', `'x=5'`],

}).then((results) => {

PythonShell.defaultOptions = {

// reset to match initial value

scriptPath: pythonFolder,

};

results.should.be.an.Array();

results[0].should.be.an.String();

results[0].slice(0, 6).should.eql('1 loop');

done();

});

after(() => {

// should be able to run modules test should theoretically reset this

// but we have this to in case something goes horribly wrong with the test

PythonShell.defaultOptions = {

// reset to match initial value

scriptPath: pythonFolder,

};

});

it('should run PythonShell normally without access to std streams', async function () {

var pyshell = await PythonShell.run('exit-code.py', {

// 3 different ways of assigning values to the std streams in child_process.spawn()

// * ignore - pipe to /dev/null

// * inherit - inherit fd from parent process;

// * process.stderr - pass output directly to that stream.

stdio: ['ignore', 'inherit', process.stderr],

// @ts-expect-error python-shell technically allows a non-array arg,

// although the user shouldn't be doing this. We are just testing for

// increased code coverage

args: '0',

});

should(pyshell).be.eql([]);

});

describe('.send(message)', function () {

it('should send string messages when mode is "text"', function (done) {

let pyshell = new PythonShell('echo_text.py', {

mode: 'text',

});

let output = '';

pyshell.stdout.on('data', function (data) {

output += '' + data;

});

pyshell

.send('hello')

.send('world')

.end(function (err) {

if (err) return done(err);

output.should.be.exactly('hello' + newline + 'world' + newline);

done();

});

it('should send JSON messages when mode is "json"', function (done) {

let pyshell = new PythonShell('echo_json.py', {

mode: 'json',

});

let output = '';

pyshell.stdout.on('data', function (data) {

output += '' + data;

});

pyshell

.send({ a: 'b' })

.send(null)

.send([1, 2, 3])

.end(function (err) {

if (err) return done(err);

output.should.be.exactly(

'{"a": "b"}' + newline + 'null' + newline + '[1, 2, 3]' + newline,

);

done();

});

it('should use a custom formatter', function (done) {

let pyshell = new PythonShell('echo_text.py', {

formatter: function (message) {

return message.toUpperCase();

});

let output = '';

pyshell.stdout.on('data', function (data) {

output += '' + data;

});

pyshell

.send('hello')

.send('world')

.end(function (err) {

if (err) return done(err);

output.should.be.exactly('HELLO' + newline + 'WORLD' + newline + '');

done();

});

it('should write as-is when mode is "binary"', function (done) {

let pyshell = new PythonShell('echo_binary.py', {

mode: 'binary',

});

let output = '';

pyshell.stdout.on('data', function (data) {

output += '' + data;

});

pyshell.send(Buffer.from('i am not a string')).end(function (err) {

if (err) return done(err);

output.should.be.exactly('i am not a string');

done();

});

describe('stdout', function () {

it('should emit messages as strings when mode is "text"', function (done) {

let pyshell = new PythonShell('echo_text.py', {

mode: 'text',

});

let count = 0;

pyshell

.on('message', function (message) {

count === 0 && message.should.be.exactly('hello');

count === 1 && message.should.be.exactly('world');

count++;

})

.on('close', function () {

count.should.be.exactly(2);

})

.send('hello')

.send('world')

.end(done);

});

it('should emit messages as JSON when mode is "json"', function (done) {

let pyshell = new PythonShell('echo_json.py', {

mode: 'json',

});

let count = 0;

pyshell.send({ a: 'b' }).send(null).send([1, 2, 3, 4, 5]);

pyshell

.on('message', function (message) {

count === 0 && message.should.eql({ a: 'b' });

count === 1 && should(message).eql(null);

count === 2 && message.should.eql([1, 2, 3, 4, 5]);

count++;

})

.on('close', function () {

count.should.be.exactly(3);

})

.end(done);

});

it('should properly buffer partial messages', function (done) {

// echo_text_with_newline_control echoes text with $'s replaced with newlines

let pyshell = new PythonShell('echo_text_with_newline_control.py', {

mode: 'text',

});

pyshell

.on('message', (message) => {

console.log(message);

let messageObject = JSON.parse(message);

messageObject.should.be.an.Object;

messageObject.should.eql({ a: true });

})

.send('{"a"')

.send(':')

.send('true}${')

.send('"a":true}$')

.end(() => {

done();

});

it('should not be invoked when mode is "binary"', function (done) {

let pyshell = new PythonShell('echo_args.py', {

args: ['hello', 'world'],

mode: 'binary',

});

pyshell.on('message', () => {

done('should not emit messages in binary mode');

return undefined;

});

pyshell.end(done);

});

it('should use a custom parser function', function (done) {

let pyshell = new PythonShell('echo_text.py', {

mode: 'text',

parser: function (message) {

return message.toUpperCase();

});

let count = 0;

pyshell

.on('message', function (message) {

count === 0 && message.should.be.exactly('HELLO');

count === 1 && message.should.be.exactly('WORLD!');

count++;

})

.on('close', function () {

count.should.be.exactly(2);

})

.send('hello')

.send('world!')

.end(done);

});

describe('stderr', function () {

it('should emit stderr logs as strings when mode is "text"', function (done) {

let pyshell = new PythonShell('stderrLogging.py', {

mode: 'text',

});

let count = 0;

pyshell

.on('stderr', function (stderr) {

count === 0 &&

stderr.should.be.exactly(

'INFO:root:Jackdaws love my big sphinx of quartz.',

);

count === 1 &&

stderr.should.be.exactly(

'DEBUG:log1:Quick zephyrs blow, vexing daft Jim.',

);

count++;

})

.on('close', function () {

count.should.be.exactly(5);

})

.send('hello')

.send('world')

.end(done);

});

it('should not be invoked when mode is "binary"', function (done) {

let pyshell = new PythonShell('stderrLogging.py', {

stderrParser: 'binary',

});

pyshell.on('stderr', () => {

done('should not emit stderr in binary mode');

});

pyshell.end(() => {

done();

});

it('should use a custom parser function', function (done) {

let pyshell = new PythonShell('stderrLogging.py', {

mode: 'text',

stderrParser: function (stderr) {

return stderr.toUpperCase();

});

let count = 0;

pyshell

.on('stderr', function (stderr) {

count === 0 &&

stderr.should.be.exactly(

'INFO:ROOT:JACKDAWS LOVE MY BIG SPHINX OF QUARTZ.',

);

count === 1 &&

stderr.should.be.exactly(

'DEBUG:LOG1:QUICK ZEPHYRS BLOW, VEXING DAFT JIM.',

);

count++;

})

.on('close', function () {

count.should.be.exactly(5);

})

.send('hello')

.send('world!')

.end(done);

});

describe('.end(callback)', function () {

it('should end normally when exit code is zero', function (done) {

let pyshell = new PythonShell('exit-code.py');

pyshell.end(function (err, code, signal) {

if (err) return done(err);

code.should.be.exactly(0);

done();

});

it('should emit error if exit code is not zero', function (done) {

let pyshell = new PythonShell('exit-code.py', {

args: ['3'],

});

pyshell.on('pythonError', function (err) {

err.should.have.properties({

message: 'process exited with code 3',

exitCode: 3,

});

done();

});

it('should emit error when the program exits because of an unhandled exception', function (done) {

let pyshell = new PythonShell('error.py');

pyshell.on('pythonError', function (err) {

err.message.should.be.equalOneOf(

'ZeroDivisionError: integer division or modulo by zero',

'ZeroDivisionError: division by zero',

);

err.should.have.property('traceback');

err.traceback.should.containEql('Traceback (most recent call last)');

done();

});

it('should NOT emit error when logging is written to stderr', function (done) {

let pyshell = new PythonShell('stderrLogging.py');

pyshell.on('pythonError', function (err) {

done(new Error('an error should not have been raised'));

});

pyshell.on('close', function () {

done();

});

describe('.parseError(data)', function () {

it('should extend error with context properties', function (done) {

let pyshell = new PythonShell('exit-code.py', {

args: ['1'],

});

pyshell.on('pythonError', function (err) {

err.should.have.properties(['exitCode', 'script', 'options', 'args']);

done();

});

it('should extend err.stack with traceback', function (done) {

let pyshell = new PythonShell('error.py');

pyshell.on('pythonError', function (err) {

err.stack.should.containEql('----- Python Traceback -----');

err.stack.should.containEql(

'test' + sep + 'python' + sep + 'error.py", line 4',

);

err.stack.should.containEql(

'test' + sep + 'python' + sep + 'error.py", line 6',

);

done();

});

it('should work in json mode', function (done) {

let pyshell = new PythonShell('error.py', { mode: 'json' });

pyshell.on('pythonError', function (err) {

err.stack.should.containEql('----- Python Traceback -----');

err.stack.should.containEql(

'test' + sep + 'python' + sep + 'error.py", line 4',

);

err.stack.should.containEql(

'test' + sep + 'python' + sep + 'error.py", line 6',

);

done();

});

describe('.kill()', function () {

it('set terminated to correct value', function (done) {

let pyshell = new PythonShell('infinite_loop.py');

pyshell.kill();

pyshell.terminated.should.be.true;

done();

});

it('run the end callback if specified', function (done) {

let pyshell = new PythonShell('infinite_loop.py');

pyshell.end(() => {

done();

});

pyshell.kill();

});

it('kill with correct signal', function (done) {

let pyshell = new PythonShell('infinite_loop.py');

pyshell.terminated.should.be.false;

pyshell.kill('SIGKILL');

pyshell.terminated.should.be.true;

setTimeout(() => {

pyshell.exitSignal.should.be.exactly('SIGKILL');

done();

}, 500);

});

python-shell/test/test-python-shell.ts at master · ishandutta2007/python-shell · GitHub

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