added tests

djangoapps/courseware/test_files/multichoice.xml

+<problem>
+<multiplechoiceresponse max="10" randomize="yes">
+  <choicegroup>
+    <choice location="random" correct="false" name="foil1">
+      <startouttext />This is foil One.<endouttext />
+    </choice>
+    <choice location="random" correct="false" name="foil2">
+      <startouttext />This is foil Two.<endouttext />
+    </choice>
+    <choice location="random" correct="true" name="foil3">
+      <startouttext />This is foil Three.<endouttext />
+    </choice>
+    <choice location="random" correct="false" name="foil4">
+      <startouttext />This is foil Four.<endouttext />
+    </choice>
+    <choice location="random" correct="false" name="foil5">
+      <startouttext />This is foil Five.<endouttext />
+    </choice>
+  </choicegroup>
+</multiplechoiceresponse>
+</problem>

djangoapps/courseware/test_files/truefalse.xml

+<problem>
+  <truefalseresponse max="10" randomize="yes">
+  <choicegroup>
+    <choice location="random" correct="true" name="foil1">
+      <startouttext />This is foil One.<endouttext />
+    </choice>
+    <choice location="random" correct="true" name="foil2">
+      <startouttext />This is foil Two.<endouttext />
+    </choice>
+    <choice location="random" correct="false" name="foil3">
+      <startouttext />This is foil Three.<endouttext />
+    </choice>
+    <choice location="random" correct="false" name="foil4">
+      <startouttext />This is foil Four.<endouttext />
+    </choice>
+    <choice location="random" correct="false" name="foil5">
+            <startouttext />This is foil Five.<endouttext />
+    </choice>
+  </choicegroup>
+</truefalseresponse>
+</problem>

djangoapps/courseware/tests.py

 import unittest
+import os
 
 import numpy
 
 import courseware.modules
 import courseware.capa.calc as calc
+import courseware.capa.capa_problem as lcp
 from grades import Score, aggregate_scores
 
 class ModelsTest(unittest.TestCase):
@@ -59,6 +61,29 @@ class ModelsTest(unittest.TestCase):
             exception_happened = True
         self.assertTrue(exception_happened)
 
+class MultiChoiceTest(unittest.TestCase):
+    def test_MC_grade(self):
+        multichoice_file = os.getcwd()+"/djangoapps/courseware/test_files/multichoice.xml"
+        test_lcp = lcp.LoncapaProblem(multichoice_file, '1')
+        correct_answers = {'1_2_1':'foil3'}
+        self.assertEquals(test_lcp.grade_answers(correct_answers)['1_2_1'], 'correct')
+        false_answers = {'1_2_1':'foil2'}
+        self.assertEquals(test_lcp.grade_answers(false_answers)['1_2_1'], 'incorrect')
+        
+    def test_TF_grade(self):
+        truefalse_file =  os.getcwd()+"/djangoapps/courseware/test_files/truefalse.xml"
+        test_lcp = lcp.LoncapaProblem(truefalse_file, '1')
+        correct_answers = {'1_2_1':['foil2', 'foil1']}
+        self.assertEquals(test_lcp.grade_answers(correct_answers)['1_2_1'], 'correct')
+        false_answers = {'1_2_1':['foil1']}
+        self.assertEquals(test_lcp.grade_answers(false_answers)['1_2_1'], 'incorrect')
+        false_answers = {'1_2_1':['foil1', 'foil3']}
+        self.assertEquals(test_lcp.grade_answers(false_answers)['1_2_1'], 'incorrect')
+        false_answers = {'1_2_1':['foil3']}
+        self.assertEquals(test_lcp.grade_answers(false_answers)['1_2_1'], 'incorrect')
+        false_answers = {'1_2_1':['foil1', 'foil2', 'foil3']}
+        self.assertEquals(test_lcp.grade_answers(false_answers)['1_2_1'], 'incorrect')
+
 class GraderTest(unittest.TestCase):
 
     def test_weighted_grading(self):