def test__div__KnownValues(self):
"""__div__ should give known result with known input"""
x=units.NumberDict()
x=units.NumberDict([('t1',1),('t2',2)])
y=10.0
result1=x/y
self.assertEqual((.1,.20), (result1['t1'],result1['t2']))
def test__add__KnownValues(self):
"""__add__ should give known result with known input
for non-string data types, addition must be commutative"""
x=units.NumberDict()
y=units.NumberDict()
x['t1'],x['t2']= 1,2
y['t1'],y['t2']=2,1
result1,result2=x+y,y+x
self.assertEqual((3,3), (result1['t1'],result1['t2']))
self.assertEqual((3,3), (result2['t1'],result2['t2']))
def test__sub__KnownValues(self):
"""__sub__ should give known result with known input
commuting the input should result in equal magnitude, opposite sign"""
x=units.NumberDict()
y=units.NumberDict()
x['t1'],x['t2']= 1,2
y['t1'],y['t2']= 2,1
result1,result2=x-y,y-x
self.assertEqual((-1,1), (result1['t1'],result1['t2']))
self.assertEqual((1,-1), (result2['t1'],result2['t2']))
def test__mul__KnownValues(self):
"""__mul__ should give known result with known input"""
x=units.NumberDict([('t1',1),('t2',2)])
y=10
result1,result2=x*y,y*x
self.assertEqual((10,20), (result1['t1'],result1['t2']))
self.assertEqual((10,20), (result2['t1'],result2['t2']))
def test__UknownKeyGives0(self):
"""a NumberDict instance should initilize using integer and non-integer indices
a NumberDict instance should initilize all entries with an initial value of 0"""
x=units.NumberDict()
#integer test
self.assertEqual(x[0],0)
#string test
self.assertEqual(x['t'],0)