From ddef1ad7d8775c114a0b379e3075ef0a33563add Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Tue, 5 Feb 2013 12:18:21 -0500
Subject: [PATCH] Initial ScriptQuestion framework

---
 quiz.json           | 10 ++++++++++
 quizzer/question.py | 20 ++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/quiz.json b/quiz.json
index 894105e..9f1c902 100644
--- a/quiz.json
+++ b/quiz.json
@@ -30,6 +30,16 @@
 			"dependencies": [
 				"What is your quest?"
 				]
+		},
+		{
+			"class": "ScriptQuestion",
+			"interpreter": "sh",
+			"prompt": "list all the files in the current directory",
+			"answer": "ls",
+			"setup": [
+				"touch file-1 file-2 file-3"
+				],
+			"help": "http://pubs.opengroup.org/onlinepubs/009696699/idx/utilities.html"
 		}
 	]
 }
diff --git a/quizzer/question.py b/quizzer/question.py
index 7cebd30..1783d9c 100644
--- a/quizzer/question.py
+++ b/quizzer/question.py
@@ -50,6 +50,26 @@ class NormalizedStringQuestion (Question):
         return self.normalize(answer) == self.normalize(self.answer)
 
 
+class ScriptQuestion (Question):
+    _state_attributes = Question._state_attributes + [
+        'interpreter',
+        'setup',
+        'teardown',
+        ]
+
+    def __setstate__(self, state):
+        if 'interpreter' not in state:
+            state['interpreter'] = 'sh'  # POSIX-compatible shell
+        for key in ['setup', 'teardown']:
+            if key not in state:
+                state[key] = []
+        super(ScriptQuestion, self).__setstate__(state)
+
+    def check(self, answer):
+        script = '\n'.join(self.setup + [answer] + self.teardown)
+        raise ValueError(script)
+
+
 for name,obj in list(locals().items()):
     if name.startswith('_'):
         continue
-- 
2.26.2