## Debuging example: make the unittests work"
# Code with bugs in...
def textToHex(text):
    """This code should convert ASCII text to the unicode hex"""
    out = []
    for c in text:
        out.append(ord(c))
    return " ".join("{:x}".format(i) for i in out)

def runningAverage(data,window):
    """Take the running average of a set of numbers, with a given window"""
    out = [0. for i in range(len(data))]
    for i in range(len(data)):
        for j in range(i-window,i+window+1):
            if( j >= 0 and j < len(data) ):
                out[i] += data[j]
        out[i] /= (2*window + 1)
    return out

# The unittest suite allows you to write tests that your code must pass
# After every change to the code you can test to check the code still works
import unittest 

class ExampleCode(unittest.TestCase):
    """Example of how to use unittest in Jupyter."""
    
    def testTrue(self):
        """A simple test that should always pass"""
        self.assertEqual('foo'.upper(), 'FOO')
        
    def testTextToHex(self):
        """Test the textToHex function above"""
        self.assertEqual(textToHex("Hello world"), '0x48 0x65 0x6c 0x6c 0x6f 0x20 0x77 0x6f 0x72 0x6c 0x64')
    
    def testRunningAverage(self):
        """Test the running average function with a window of zero"""
        # some input data
        data = [1.,2.5,3.7,11.]
        # a window of one either side of the value for average
        window = 0
        # expected output is the same as the input 
        self.assertEqual(runningAverage(data,window),data)

    def testRunningAverage(self):
        """Test the running average function with a window of one"""
        # some input data
        data = [1.,2.5,3.7,11.]
        # a window of one either side of the value for average
        window = 1
        # expected output (note corrections at the ends of the array)
        rData = [(1.+2.5)/2, (1.+2.5+3.7)/3, (2.5+3.7+11.)/3, (3.7+11.)/2]
        self.assertEqual(runningAverage(data,window),rData)

# if this is not called from another function run the unit tests now
if __name__ == '__main__':
    unittest.main(exit=False)