1 files changed, 135 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-stream-readable-event.js b/tests/node_compat/test/parallel/test-stream-readable-event.js
new file mode 100644
index 000000000..87a4e0feb
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-stream-readable-event.js
@@ -0,0 +1,135 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
+
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+
+const Readable = require('stream').Readable;
+
+{
+  // First test, not reading when the readable is added.
+  // make sure that on('readable', ...) triggers a readable event.
+  const r = new Readable({
+    highWaterMark: 3
+  });
+
+  r._read = common.mustNotCall();
+
+  // This triggers a 'readable' event, which is lost.
+  r.push(Buffer.from('blerg'));
+
+  setTimeout(function() {
+    // We're testing what we think we are
+    assert(!r._readableState.reading);
+    r.on('readable', common.mustCall());
+  }, 1);
+}
+
+{
+  // Second test, make sure that readable is re-emitted if there's
+  // already a length, while it IS reading.
+
+  const r = new Readable({
+    highWaterMark: 3
+  });
+
+  r._read = common.mustCall();
+
+  // This triggers a 'readable' event, which is lost.
+  r.push(Buffer.from('bl'));
+
+  setTimeout(function() {
+    // Assert we're testing what we think we are
+    assert(r._readableState.reading);
+    r.on('readable', common.mustCall());
+  }, 1);
+}
+
+{
+  // Third test, not reading when the stream has not passed
+  // the highWaterMark but *has* reached EOF.
+  const r = new Readable({
+    highWaterMark: 30
+  });
+
+  r._read = common.mustNotCall();
+
+  // This triggers a 'readable' event, which is lost.
+  r.push(Buffer.from('blerg'));
+  r.push(null);
+
+  setTimeout(function() {
+    // Assert we're testing what we think we are
+    assert(!r._readableState.reading);
+    r.on('readable', common.mustCall());
+  }, 1);
+}
+
+{
+  // Pushing an empty string in non-objectMode should
+  // trigger next `read()`.
+  const underlyingData = ['', 'x', 'y', '', 'z'];
+  const expected = underlyingData.filter((data) => data);
+  const result = [];
+
+  const r = new Readable({
+    encoding: 'utf8',
+  });
+  r._read = function() {
+    process.nextTick(() => {
+      if (!underlyingData.length) {
+        this.push(null);
+      } else {
+        this.push(underlyingData.shift());
+      }
+    });
+  };
+
+  r.on('readable', () => {
+    const data = r.read();
+    if (data !== null) result.push(data);
+  });
+
+  r.on('end', common.mustCall(() => {
+    assert.deepStrictEqual(result, expected);
+  }));
+}
+
+{
+  // #20923
+  const r = new Readable();
+  r._read = function() {
+    // Actually doing thing here
+  };
+  r.on('data', function() {});
+
+  r.removeAllListeners();
+
+  assert.strictEqual(r.eventNames().length, 0);
+}