TDD Assignment

FizzBuzz.py

@@ -1,16 +1,17 @@
 """
 Q1. Why is the report method untestable ? [2 pts]
 
-
+Ans: dependency on external collabrators. [file operation]
 
 
 Q2. How will you change the api of the report method to make it more testable ? [2 pts]
 
+Ans:   def report(self, numbers, FileHandlerMock)
 
 
 """
 class FizzBuzz(object):
-    def report(self, numbers):
+    def report(self, numbers, MyStub):
 
         report_file = open('c:/temp/fizzbuzz_report.txt', 'w')
 

TestFizzBuzzMocked.py

@@ -17,7 +17,19 @@ def tearDown(self):
         self.fb = None
 
     def test_report(self):
-        pass
+        #inpur numbers
+        numbers =[1,2,3,4]
+        #create mock file handler
+        mock_opener_interface = self.mock()
+        mock_file = self.mock()
+        #set expectations
+        self.expectAndReturn(mock_opener_interface.open('c:/temp/fizzbuzz_report.txt', 'w'), mock_file)        mock_file.write("3 fizz \n")        mock_file.close()
+        #replay
+        self.replay()
+        #call prod method
+        self.fb.report(numbers, opener=mock_opener_interface.open)
+        # verify
+        self.verify()
 
 
 

TestFizzBuzzStubbed.py

@@ -4,27 +4,35 @@
 """
 Q3. What will be printed when we execute 'python FizzBuzzStubbed.py' ? [3 pts]
 
-
-
-
-
-
-
+setUpClass FizzBuzzStubbed
+setup
+test_report
+teardown
+setup
+test_report
+teardown
+tearDownClass
 
 
 Q4. Implement MyStub class so that you can send it as a fake object to the
     report method of FizzBuzz object from a test case. [3 pts]
 
 """
 class MyStub(object):
-    pass
-
-
-
-
-
-
+    def __init__(self):
+        self.values = []
+
+    def write(self, value):
+        self.values.append(value)
+
+    def close(self):
+        self.closed = True
 
+    def open_stub(self):
+        def open(fpath, mode):
+            return self
+        return open
+
 
 
 class TestFizzBuzzStubbed(unittest.TestCase):
@@ -49,11 +57,21 @@ def tearDown(self):
 
     def test_report(self):
         print "test_report"
-        pass
+        myStub = MyStub()
+        fileopener = myStub.open_stub()
+        numbers = [1,2,3,4]
+        self.fb.report(numbers, fileopener)
+        self.assertEqual(values[0], '3 fizz \n')
+        self.assertEqual(values[1], '5 buzz \n')
 
     def test_report_for_empty_list(self):
         print "test_report"
-        pass
+        myStub = MyStub()
+        fileopener = myStub.open_stub()
+        numbers = []
+        self.fb.report(numbers, fileopener)        
+
+
 
 if __name__ == "__main__":
     unittest.main()