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'use strict';
const common = require('../common');
const assert = require('assert');
const {Writable, Readable} = require('stream');
class NullWriteable extends Writable {
_write(chunk, encoding, callback) {
return callback();
}
}
class QuickEndReadable extends Readable {
_read() {
this.push(null);
}
}
class NeverEndReadable extends Readable {
_read() {}
}
{
const dest = new NullWriteable();
const src = new QuickEndReadable();
dest.on('pipe', common.mustCall());
dest.on('unpipe', common.mustCall());
src.pipe(dest);
setImmediate(() => {
assert.strictEqual(src._readableState.pipesCount, 0);
});
}
{
const dest = new NullWriteable();
const src = new NeverEndReadable();
dest.on('pipe', common.mustCall());
dest.on('unpipe', common.mustNotCall('unpipe should not have been emitted'));
src.pipe(dest);
setImmediate(() => {
assert.strictEqual(src._readableState.pipesCount, 1);
});
}
{
const dest = new NullWriteable();
const src = new NeverEndReadable();
dest.on('pipe', common.mustCall());
dest.on('unpipe', common.mustCall());
src.pipe(dest);
src.unpipe(dest);
setImmediate(() => {
assert.strictEqual(src._readableState.pipesCount, 0);
});
}
{
const dest = new NullWriteable();
const src = new QuickEndReadable();
dest.on('pipe', common.mustCall());
dest.on('unpipe', common.mustCall());
src.pipe(dest, {end: false});
setImmediate(() => {
assert.strictEqual(src._readableState.pipesCount, 0);
});
}
{
const dest = new NullWriteable();
const src = new NeverEndReadable();
dest.on('pipe', common.mustCall());
dest.on('unpipe', common.mustNotCall('unpipe should not have been emitted'));
src.pipe(dest, {end: false});
setImmediate(() => {
assert.strictEqual(src._readableState.pipesCount, 1);
});
}
{
const dest = new NullWriteable();
const src = new NeverEndReadable();
dest.on('pipe', common.mustCall());
dest.on('unpipe', common.mustCall());
src.pipe(dest, {end: false});
src.unpipe(dest);
setImmediate(() => {
assert.strictEqual(src._readableState.pipesCount, 0);
});
}
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