test: test for issue #5574

test/parallel/test-readline-interface-tty-readstream.js

@@ -0,0 +1,73 @@
+'use strict';
+// Refs: https://github.com/nodejs/node/issues/5574
+
+/**
+ * Test that characters from stdin are not randomly lost when using a
+ * `readline.Interface` and a `tty.ReadStream` on `process.stdin`
+ */
+
+var Interface   = require('readline').Interface;
+var Readable    = require('stream').Readable;
+var ReadStream  = require('tty').ReadStream;
+var spawn       = require('child_process').spawn;
+var strictEqual = require('assert').strictEqual;
+
+var common = require('../common');
+
+
+const kpm = 60;
+const input = `1234567890
+qwertyuiop
+asdfghjklñ
+zxcvbnm`;
+
+
+if (process.argv[2] === 'parent')
+  parent();
+else
+  grandparent();
+
+function grandparent() {
+  var child = spawn(process.execPath, [__filename, 'parent']);
+  child.stderr.pipe(process.stderr);
+
+  var stdin = Readable({read: function() {}});
+  stdin.pipe(child.stdin);
+
+  var output = '';
+  child.stdout.on('data', function(chunk) {
+    output += chunk;
+  });
+  child.stdout.setEncoding('utf8');
+
+  var index = 0;
+  function type() {
+    var data = input[index] || null;
+
+    stdin.push(data);
+    index++;
+
+    if (data !== null)
+      return setTimeout(type, 60 * 1000 / kpm);
+  }
+
+  type();
+
+  child.on('close', common.mustCall(function(code, signal) {
+    strictEqual(signal, null);
+    strictEqual(code, 0);
+    // cat on windows adds a \r\n at the end.
+    strictEqual(output.trim(), input.trim());
+  }));
+}
+
+function parent() {
+  Interface(process.stdin, process.stdout);
+
+  var stdin = ReadStream(process.stdin.fd);
+  process.stdin.pause();
+
+  var stdio = [stdin, process.stdout];
+
+  common.spawnCat({ stdio: stdio });
+}