* Added a bunch of tests

* refactored abs(delta) into delta2dict

ago.py

@@ -3,6 +3,7 @@ from datetime import timedelta
 
 def delta2dict( delta ):
     """return dictionary of delta"""
+    delta = abs( delta )
     return { 
         'year'   : delta.days / 365 ,
         'day'    : delta.days % 365 ,
@@ -15,9 +16,7 @@ def delta2dict( delta ):
 def delta2human(delta, precision=2, past_format='{0} ago', future_format='in {0}'):
     """return human readable delta string"""
     the_format = past_format
-    if delta < timedelta(0): # if true delta is in future 
-        the_format = future_format
-        delta = abs( delta )
+    if delta < timedelta(0): the_format = future_format
     d = delta2dict( delta )
     hlist = [] 
     count = 0

test_ago.py

@@ -21,6 +21,40 @@ def test_delta2human_is_string():
 def test_delta2dict_is_dict():
     assert 'dict' in str(type(delta2dict( PAST_DELTA )))
 
+def test_ago_in_past_human():
+    assert 'ago' in human( PAST )
+
+def test_in_in_future_human():
+    assert 'in' in human( FUTURE )
+
+def test_no_coma_in_one_precision():
+    assert ',' not in human( PAST, precision = 1 )
+    assert ',' not in human( FUTURE, precision = 1 )
+
+def test_coma_in_three_precision():
+    assert ',' in human( PAST, precision = 3 )
+    assert ',' in human( FUTURE, precision = 3 )
+
+def test_one_day_singular():
+    assert 's' not in delta2human( timedelta(1) )
+
+def test_two_day_plural():
+    assert 's' in delta2human( timedelta(2) )
+
+def test_past_format():
+    output = human( PAST,
+      format_past = 'titanic sunk {0} ago',
+      format_future = 'titanic will sink in {0} from now'
+    )
+    assert 'titanic sunk' in output
+
+def test_future_format():
+    output = human( FUTURE,
+      format_past = 'titanic sunk {0} ago',
+      format_future = 'titanic will sink in {0} from now'
+    )
+    assert 'titanic will sink in' in output
+
 def test_valid_dict():
     past_dict = delta2dict( PAST_DELTA )
     assert past_dict['year'] == 1
@@ -35,11 +69,11 @@ def test_output():
     print '\nTesting past:\n'
     print delta2dict( PAST_DELTA )
     print 'Commented ' + delta2human( PAST_DELTA, 3 )
-    print 'Commented ' + human( PAST )
+    print human( PAST, format_past = "Commented {0} ago" )
 
     print '\nTesting future:\n'
     print delta2dict( FUTURE_DELTA )
     print 'Shutdown ' + delta2human( FUTURE_DELTA, 3 )
-    print 'Shutdown ' + human( FUTURE )
+    print human( FUTURE, format_future = 'Shutdown in {0} from now' )
     print ''