Adding getOppositeColor unittest.

requirements-dev.txt

@@ -1,3 +1,4 @@
 nose>=1.3.7
 mock>=1.3.0
 sh>=1.11
+parameterized>=0.6.1

test/color_compliment_test.py

@@ -0,0 +1,49 @@
+import unittest
+from parameterized import parameterized
+
+from powerline_shell.color_compliment import getOppositeColor
+
+
+def build_inputs():
+    
+    # Build 768 hex/rgb values to test against getOppositeColor
+    input_bytes = map(hex, xrange(pow(2,8)))
+
+    input_list = []
+    for x in input_bytes:
+
+        #Building hex range of [00-ff]:00:00
+        combined1 = hex((int(x,16)<<16)| ((int(input_bytes[0],16)<<8)|int(input_bytes[0],16))) 
+        test_input1 = tuple((int(x,16), int(input_bytes[0],16), int(input_bytes[0],16)))
+
+        #Building hex range of 00:[00-ff]:00
+        combined2 = hex((int(input_bytes[0],16)<<16)| ((int(x,16)<<8)|int(input_bytes[0],16)))
+        test_input2 = tuple((int(input_bytes[0],16), int(x,16), int(input_bytes[0],16))) 
+
+        #Building hex range of 00:00:[00-ff]
+        combined3 = hex((int(input_bytes[0],16)<<16)| ((int(input_bytes[0],16)<<8)|int(x,16)))
+        test_input3 = tuple((int(input_bytes[0],16), int(input_bytes[0],16), int(x,16))) 
+
+        input_list.append(tuple((combined1, test_input1)))
+        input_list.append(tuple((combined2, test_input2)))
+        input_list.append(tuple((combined3, test_input3)))
+
+    return input_list
+
+class getOppositeColorTestCase(unittest.TestCase):
+
+    '''
+    Test only runs against 768 combinations of rgb values. 
+    Trying to run parameterized unittest against 16.77M rgb values
+    was near impossible (need lots of memory and time).  Of the 768 
+    values tested, the test has proven to catch 192 exceptions (and 3
+    ZeroDivisionError exceptions from rgb_to_hls).  This can be tested
+    by commenting out the first line of getOppositeColor, which 
+    converts the rgb values to float.
+    '''
+
+    @parameterized.expand(build_inputs)
+ 
+    def test_rgb_input_get_opposite_not_negative(self, name, test_input):
+        negative = -1
+        self.assertNotIn(negative, getOppositeColor(*test_input), u'{0:#08x} returns negative number in rgb tuple'.format(int(name,16)))