import * as assert from 'assert';

import { EOL } from 'os';

import * as vscode from 'vscode';

import { createDeferred } from '../../client/common/helpers';

import { execPythonFile, getInterpreterVersion } from '../../client/common/utils';

import { initialize } from './../initialize';

// Defines a Mocha test suite to group tests of similar kind together

suite('ChildProc', () => {

setup(initialize);

teardown(initialize);

test('Standard Response', done => {

execPythonFile(undefined, 'python', ['-c', 'print(1)'], __dirname, false).then(data => {

assert.ok(data === `1${EOL}`);

}).then(done).catch(done);

});

test('Error Response', done => {

// tslint:disable-next-line:no-any

const def = createDeferred<any>();

execPythonFile(undefined, 'python', ['-c', 'print(1'], __dirname, false).then(() => {

def.reject('Should have failed');

}).catch(() => {

def.resolve();

});

def.promise.then(done).catch(done);

});

test('Stream Stdout', done => {

const output: string[] = [];

function handleOutput(data: string) {

output.push(data);

}

execPythonFile(undefined, 'python', ['-c', 'print(1)'], __dirname, false, handleOutput).then(() => {

assert.equal(output.length, 1, 'Ouput length incorrect');

assert.equal(output[0], `1${EOL}`, 'Ouput value incorrect');

}).then(done).catch(done);

});

test('Stream Stdout (Unicode)', async () => {

const output: string[] = [];

function handleOutput(data: string) {

output.push(data);

}

await execPythonFile(undefined, 'python', ['-c', 'print(\'öä\')'], __dirname, false, handleOutput);

assert.equal(output.length, 1, 'Ouput length incorrect');

assert.equal(output[0], `öä${EOL}`, 'Ouput value incorrect');

});

test('Stream Stdout with Threads', function (done) {

// tslint:disable-next-line:no-invalid-this

this.timeout(6000);

const output: string[] = [];

function handleOutput(data: string) {

output.push(data);

}

execPythonFile(undefined, 'python', ['-c', 'import sys\nprint(1)\nsys.__stdout__.flush()\nimport time\ntime.sleep(5)\nprint(2)'], __dirname, false, handleOutput).then(() => {

assert.equal(output.length, 2, 'Ouput length incorrect');

assert.equal(output[0], `1${EOL}`, 'First Ouput value incorrect');

assert.equal(output[1], `2${EOL}`, 'Second Ouput value incorrect');

}).then(done).catch(done);

});

test('Kill', done => {

// tslint:disable-next-line:no-any

const def = createDeferred<any>();

const output: string[] = [];

function handleOutput(data: string) {

output.push(data);

}

const cancellation = new vscode.CancellationTokenSource();

execPythonFile(undefined, 'python', ['-c', 'import sys\nprint(1)\nsys.__stdout__.flush()\nimport time\ntime.sleep(5)\nprint(2)'], __dirname, false, handleOutput, cancellation.token).then(() => {

def.reject('Should not have completed');

}).catch(() => {

def.resolve();

});

setTimeout(() => {

cancellation.cancel();

}, 1000);

def.promise.then(done).catch(done);

});

test('Get Python display name', async () => {

const displayName = await getInterpreterVersion('python');

assert.equal(typeof displayName, 'string', 'Display name not returned');

assert.notEqual(displayName.length, 0, 'Display name cannot be empty');

});

});