initial tests

* Don't buffer command, before it's execution (repl)
* `quit` command, custom streams for .start, stubbed out test, disable
  history repeation for non-tty (debugger)

lib/_debugger.js

@@ -880,7 +880,7 @@ Interface.prototype.requireConnection = function() {
 Interface.prototype.controlEval = function(code, context, filename, callback) {
   try {
     // Repeat last command if empty line are going to be evaluated
-    if (this.repl.rli.history.length > 0) {
+    if (this.repl.rli.history && this.repl.rli.history.length > 0) {
       if (code === '(undefined\n)') {
         code = '(' + this.repl.rli.history[0] + '\n)';
       }
@@ -1362,6 +1362,13 @@ Interface.prototype.exitRepl = function() {
 };
 
 
+// Quit
+Interface.prototype.quit = function() {
+  this.killChild();
+  process.exit(0);
+};
+
+
 // Kills child process
 Interface.prototype.killChild = function() {
   if (this.child) {

lib/repl.js

@@ -159,7 +159,8 @@ function REPLServer(prompt, stream, eval) {
     }
 
     if (!skipCatchall) {
-      self.bufferedCommand += cmd + '\n';
+      var evalCmd = self.bufferedCommand + cmd + '\n';
+
       // This try is for determining if the command is complete, or should
       // continue onto the next line.
       // We try to evaluate both expressions e.g.
@@ -169,7 +170,7 @@ function REPLServer(prompt, stream, eval) {
 
       // First we attempt to eval as expression with parens.
       // This catches '{a : 1}' properly.
-      self.eval('(' + self.bufferedCommand + ')',
+      self.eval('(' + evalCmd + ')',
                 self.context,
                 'repl',
                 function(e, ret) {
@@ -177,7 +178,7 @@ function REPLServer(prompt, stream, eval) {
 
         if (typeof ret === 'function' || e) {
           // Now as statement without parens.
-          self.eval(self.bufferedCommand, self.context, 'repl', finish);
+          self.eval(evalCmd, self.context, 'repl', finish);
         } else {
           finish(null, ret);
         }
@@ -203,6 +204,7 @@ function REPLServer(prompt, stream, eval) {
         // {
         // ...  x: 1
         // ... }
+        self.bufferedCommand += cmd + '\n';
         self.displayPrompt();
         return;
       } else if (e) {

test/simple/test-debugger-repl.js

@@ -0,0 +1,155 @@
+// 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.
+
+
+var common = require('../common');
+var assert = require('assert');
+var spawn = require('child_process').spawn;
+var debug = require('_debugger');
+
+var code = [
+  '',
+  'debugger;',
+  'debugger;',
+  'function a(x) {',
+  '  var i = 10;',
+  '  while (--i != 0);',
+  '  debugger;',
+  '  return i;',
+  '}',
+  'function b() {',
+  '  return ["hello", "world"].join(" ");',
+  '}',
+  'a()',
+  'a(1)',
+  'b()',
+  'b()'
+].join('\n');
+
+var child = spawn(process.execPath, ['debug', '-e', code]);
+
+var buffer = '';
+child.stdout.on('data', function(data) {
+  data = (buffer + data.toString()).split(/\n/g);
+  buffer = data.pop();
+  data.forEach(function(line) {
+    child.emit('line', line);
+  });
+});
+child.stderr.pipe(process.stdout);
+
+var expected = [];
+
+child.on('line', function(line) {
+  assert.ok(expected.length > 0, 'Got unexpected line: ' + line);
+
+  console.log(JSON.stringify(line) + ',');
+
+  var expectedLine = expected[0].lines.shift();
+  assert.equal(line, expectedLine);
+
+  if (expected[0].lines.length === 0) {
+    var callback = expected[0].callback;
+    expected.shift();
+    callback && callback();
+  }
+});
+
+function addTest(input, output) {
+  function next() {
+    if (expected.length > 0) {
+      child.stdin.write(expected[0].input + '\n');
+      console.log('---');
+      console.log('>>', expected[0].input);
+    } else {
+      finish();
+    }
+  };
+  expected.push({input: input, lines: output, callback: next});
+};
+
+// Initial lines
+addTest(null, [
+  "debug> < debugger listening on port 5858",
+  "debug> connecting... ok",
+  "debug> break in [unnamed]:3",
+  "  1 ",
+  "  2 debugger;",
+  "  3 debugger;",
+  "  4 function a(x) {",
+  "  5   var i = 10;"
+]);
+
+// Next
+addTest('n', [
+  "debug> debug> debug> break in [unnamed]:13",
+  " 11   return [\"hello\", \"world\"].join(\" \");",
+  " 12 }",
+  " 13 a()",
+  " 14 a(1)",
+  " 15 b()"
+]);
+
+// Continue
+addTest('c', [
+ "debug> debug> debug> break in [unnamed]:7",
+  "  5   var i = 10;",
+  "  6   while (--i != 0);",
+  "  7   debugger;",
+  "  8   return i;",
+  "  9 }"
+]);
+
+
+// Step out
+addTest('o', [
+  "debug> debug> debug> break in [unnamed]:14",
+  " 12 }",
+  " 13 a()",
+  " 14 a(1)",
+  " 15 b()",
+  " 16 b()"
+]);
+
+
+function finish() {
+  console.log('passed');
+  process.exit(0);
+};
+
+function quit() {
+  if (quit.called) return;
+  quit.called = true;
+  child.stdin.write('quit');
+};
+
+setTimeout(function() {
+  throw new Error('timeout!');
+}, 5000);
+
+process.once('uncaughtException', function(e) {
+  quit();
+  throw e;
+});
+
+process.on('exit', function() {
+  quit();
+});