f29762f4dd
Enable linting for the test directory. A number of changes was made so all tests conform the current rules used by lib and src directories. The only exception for tests is that unreachable (dead) code is allowed. test-fs-non-number-arguments-throw had to be excluded from the changes because of a weird issue on Windows CI. PR-URL: https://github.com/nodejs/io.js/pull/1721 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
126 lines
4 KiB
JavaScript
126 lines
4 KiB
JavaScript
'use strict';
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// Test sending and receiving a file descriptor.
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//
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// This test is pretty complex. It ends up spawning test/fixtures/recvfd.js
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// as a child to test desired behavior. What happens is
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//
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// 1. Create an in-memory pipe via pipe(2). These two file descriptors
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// are not visible to any other process, and so make a good test-case
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// for sharing.
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// 2. Create a a UNIX socket at SOCK_PATH. When a client connects to this
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// path, they are sent the write end of the pipe from above.
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// 3. The client is sent n JSON representations of the DATA variable, each
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// with a different ordinal. We send these delimited by '\n' strings
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// so that the receiving end can avoid any coalescing that happens
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// due to the stream nature of the socket (e.g. '{}{}' is not a valid
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// JSON string).
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// 4. The child process receives file descriptors and JSON blobs and,
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// whenever it has at least one of each, writes a modified JSON blob
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// to the FD. The blob is modified to include the child's process ID.
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// 5. Once the child process has sent n responses, it closes the write end
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// of the pipe, which signals to the parent that there is no more data
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// coming.
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// 6. The parent listens to the read end of the pipe, accumulating JSON
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// blobs (again, delimited by '\n') and verifying that a) the 'pid'
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// attribute belongs to the child and b) the 'ord' field has not been
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// seen in a response yet. This is intended to ensure that all blobs
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// sent out have been relayed back to us.
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var common = require('../common');
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var assert = require('assert');
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var buffer = require('buffer');
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var child_process = require('child_process');
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var fs = require('fs');
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var net = require('net');
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var netBinding = process.binding('net');
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var path = require('path');
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var DATA = {
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'ppid' : process.pid,
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'ord' : 0
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};
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var SOCK_PATH = path.join(__dirname,
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'..',
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path.basename(__filename, '.js') + '.sock');
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var logChild = function(d) {
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if (typeof d == 'object') {
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d = d.toString();
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}
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d.split('\n').forEach(function(l) {
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if (l.length > 0) {
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common.debug('CHILD: ' + l);
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}
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});
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};
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// Create a pipe
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//
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// We establish a listener on the read end of the pipe so that we can
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// validate any data sent back by the child. We send the write end of the
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// pipe to the child and close it off in our process.
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var pipeFDs = netBinding.pipe();
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assert.equal(pipeFDs.length, 2);
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var seenOrdinals = [];
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var pipeReadStream = new net.Stream();
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pipeReadStream.on('data', function(data) {
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data.toString('utf8').trim().split('\n').forEach(function(d) {
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var rd = JSON.parse(d);
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assert.equal(rd.pid, cpp);
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assert.equal(seenOrdinals.indexOf(rd.ord), -1);
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seenOrdinals.unshift(rd.ord);
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});
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});
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pipeReadStream.open(pipeFDs[0]);
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pipeReadStream.resume();
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// Create a UNIX socket at SOCK_PATH and send DATA and the write end
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// of the pipe to whoever connects.
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//
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// We send two messages here, both with the same pipe FD: one string, and
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// one buffer. We want to make sure that both datatypes are handled
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// correctly.
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var srv = net.createServer(function(s) {
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var str = JSON.stringify(DATA) + '\n';
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DATA.ord = DATA.ord + 1;
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var buf = new buffer.Buffer(str.length);
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buf.write(JSON.stringify(DATA) + '\n', 'utf8');
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s.write(str, 'utf8', pipeFDs[1]);
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if (s.write(buf, pipeFDs[1])) {
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netBinding.close(pipeFDs[1]);
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} else {
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s.on('drain', function() {
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netBinding.close(pipeFDs[1]);
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});
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}
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});
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srv.listen(SOCK_PATH);
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// Spawn a child running test/fixtures/recvfd.js
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var cp = child_process.spawn(process.argv[0],
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[path.join(common.fixturesDir, 'recvfd.js'),
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SOCK_PATH]);
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cp.stdout.on('data', logChild);
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cp.stderr.on('data', logChild);
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// When the child exits, clean up and validate its exit status
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var cpp = cp.pid;
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cp.on('exit', function(code, signal) {
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srv.close();
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// fs.unlinkSync(SOCK_PATH);
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assert.equal(code, 0);
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assert.equal(seenOrdinals.length, 2);
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});
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// vim:ts=2 sw=2 et
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