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'use strict'; const common = require('../common'); const assert = require('assert'); const { isDisturbed, isErrored, Readable } = require('stream'); function noop() {} function check(readable, data, fn) { assert.strictEqual(readable.readableDidRead, false); assert.strictEqual(isDisturbed(readable), false); assert.strictEqual(isErrored(readable), false); if (data === -1) { readable.on('error', common.mustCall(() => { assert.strictEqual(isErrored(readable), true); })); readable.on('data', common.mustNotCall()); readable.on('end', common.mustNotCall()); } else { readable.on('error', common.mustNotCall()); if (data === -2) { readable.on('end', common.mustNotCall()); } else { readable.on('end', common.mustCall()); } if (data > 0) { readable.on('data', common.mustCallAtLeast(data)); } else { readable.on('data', common.mustNotCall()); } } readable.on('close', common.mustCall()); fn(); setImmediate(() => { assert.strictEqual(readable.readableDidRead, data > 0); if (data > 0) { assert.strictEqual(isDisturbed(readable), true); } }); } { const readable = new Readable({ read() { this.push(null); } }); check(readable, 0, () => { readable.read(); }); } { const readable = new Readable({ read() { this.push(null); } }); check(readable, 0, () => { readable.resume(); }); } { const readable = new Readable({ read() { this.push(null); } }); check(readable, -2, () => { readable.destroy(); }); } { const readable = new Readable({ read() { this.push(null); } }); check(readable, -1, () => { readable.destroy(new Error()); }); } { const readable = new Readable({ read() { this.push('data'); this.push(null); } }); check(readable, 1, () => { readable.on('data', noop); }); } { const readable = new Readable({ read() { this.push('data'); this.push(null); } }); check(readable, 1, () => { readable.on('data', noop); readable.off('data', noop); }); }