tty `ReadStream`, `WriteStream`, and readline rawmode (#4179)

* tty `WriteStream`, `ReadStream`, and rawmode

* tests

* refactor prototypes

* fix failing test

* fix test and library usage

* more merge

* fix child_process test

* create pseudo terminal for tty tests

* match node logic

* handle invalid tty

* close descriptors

* move tests to another process

* fix test again

* fix test on linux

1 files changed, 7 insertions, 9 deletions

diff --git a/src/js/node/readline.js b/src/js/node/readline.js
index 0811fb95f..681cbba62 100644
--- a/src/js/node/readline.js
+++ b/src/js/node/readline.js
@@ -1604,15 +1604,13 @@ var _Interface = class Interface extends InterfaceConstructor {
     return this[kPrompt];
   }
 
-  [kSetRawMode](mode) {
-    var input = this.input;
-    var { setRawMode, wasInRawMode } = input;
-
-    // TODO: Make this work, for now just stub this and print debug
-    debug("setRawMode", mode, "set!");
-    // if (typeof setRawMode === "function") {
-    //   setRawMode(mode);
-    // }
+  [kSetRawMode](flag) {
+    const mode = flag ? 1 : 0;
+    const wasInRawMode = this.input.isRaw;
+
+    if (typeof this.input.setRawMode === "function") {
+      this.input.setRawMode(mode);
+    }
 
     return wasInRawMode;
   }