diff --git a/test/parallel/test-stream-readable-resumeScheduled.js b/test/parallel/test-stream-readable-resumeScheduled.js new file mode 100644 index 00000000000000..59042da3dbcb86 --- /dev/null +++ b/test/parallel/test-stream-readable-resumeScheduled.js @@ -0,0 +1,67 @@ +'use strict'; +const common = require('../common'); + +// Testing Readable Stream resumeScheduled state + +const assert = require('assert'); +const stream = require('stream'); +const Readable = stream.Readable; +const Writable = stream.Writable; + +{ + // pipe() test case + const r = new Readable({ read() {} }); + const w = new Writable(); + + // resumeScheduled should start = `false`. + assert.strictEqual(r._readableState.resumeScheduled, false); + + // calling pipe() should change the state value = true. + r.pipe(w); + assert.strictEqual(r._readableState.resumeScheduled, true); + + process.nextTick(common.mustCall(() => { + assert.strictEqual(r._readableState.resumeScheduled, false); + })); +} + +{ + // 'data' listener test case + const r = new Readable({ read() {} }); + + // resumeScheduled should start = `false`. + assert.strictEqual(r._readableState.resumeScheduled, false); + + r.push(Buffer.from([1, 2, 3])); + + // adding 'data' listener should change the state value + r.on('data', common.mustCall(() => { + assert.strictEqual(r._readableState.resumeScheduled, false); + })); + assert.strictEqual(r._readableState.resumeScheduled, true); + + process.nextTick(common.mustCall(() => { + assert.strictEqual(r._readableState.resumeScheduled, false); + })); +} + +{ + // resume() test case + const r = new Readable({ read() {} }); + + // resumeScheduled should start = `false`. + assert.strictEqual(r._readableState.resumeScheduled, false); + + // Calling resume() should change the state value. + r.resume(); + assert.strictEqual(r._readableState.resumeScheduled, true); + + r.on('resume', common.mustCall(() => { + // The state value should be `false` again + assert.strictEqual(r._readableState.resumeScheduled, false); + })); + + process.nextTick(common.mustCall(() => { + assert.strictEqual(r._readableState.resumeScheduled, false); + })); +}