def test_badlinear(self):
"""linear with 0 must fail."""
self.table = Hashtable(b=11, probeFunction = lambda hk, size, i : (hk + 0) % size )
self.table.add(15)
self.assertTrue(self.table.contains(15))
# probes to same spot...
self.assertTrue(self.table.add(26) < 0)
def test_badlinear(self):
"""linear with 0 must fail."""
self.table = Hashtable(b=11, probeFunction = lambda hk, size, i : (hk + 0) % size )
self.table.add(15)
self.assertTrue(self.table.contains(15))
# probes to same spot...
self.assertTrue(self.table.add(26) < 0)
def build(wordFile, numberBins, probeFunction):
"""Build Hashtable using given size and probe function ."""
# table must be at least 213557
if numberBins < 213557:
print ("Must have at least 213557 bins to store the words.")
return
table = Hashtable(numberBins, probeFunction = probeFunction)
# grab every word and construct hash table using open addressing
wf = open(wordFile)
for word in wf:
numProbes = table.add(word)
if numProbes < 0:
print ("unable to add", word, numProbes)
break
wf.close()
return table
def build(wordFile, numberBins, probeFunction):
"""Build Hashtable using given size and probe function ."""
# table must be at least 213557
if numberBins < 213557:
print("Must have at least 213557 bins to store the words.")
return
table = Hashtable(numberBins, probeFunction=probeFunction)
# grab every word and construct hash table using open addressing
wf = open(wordFile)
for word in wf:
numProbes = table.add(word)
if numProbes < 0:
print("unable to add", word, numProbes)
break
wf.close()
return table
def setUp(self):
self.table = Hashtable(b=11,
probeFunction=lambda hk, size, i:
(hk + 1) % size)
class TestHashtableMethods(unittest.TestCase):
def setUp(self):
self.table = Hashtable(b=11,
probeFunction=lambda hk, size, i:
(hk + 1) % size)
def tearDown(self):
self.table = None
def test_basic(self):
self.table.add(15)
self.assertTrue(15 in self.table.bins)
def test_fills(self):
for i in range(11):
self.assertTrue(self.table.add("s" + str(i)) > 0)
# print out hashtable for inspection
for i in range(len(self.table.bins)):
print(i, self.table.bins[i])
# now the hashtable is completely full. Can't add any more
self.assertEquals(-11, self.table.add("s" + str(12)))
def test_badlinear(self):
"""linear with 0 must fail."""
self.table = Hashtable(b=11,
probeFunction=lambda hk, size, i:
(hk + 0) % size)
self.table.add(15)
self.assertTrue(self.table.contains(15))
# probes to same spot...
self.assertTrue(self.table.add(26) < 0)
def test_deletion(self):
self.table.add(15)
self.assertTrue(self.table.contains(15))
self.table.add(26)
self.assertTrue(self.table.contains(26))
self.table.delete(15)
self.assertTrue(self.table.contains(15) < 0)
self.assertTrue(self.table.contains(26))
def setUp(self):
self.table = Hashtable(b=11, probeFunction = lambda hk, size, i : (hk + 1) % size )
class TestHashtableMethods(unittest.TestCase):
def setUp(self):
self.table = Hashtable(b=11, probeFunction = lambda hk, size, i : (hk + 1) % size )
def tearDown(self):
self.table = None
def test_basic(self):
self.table.add(15)
self.assertTrue(15 in self.table.bins)
def test_fills(self):
for i in range(11):
self.assertTrue(self.table.add("s" + str(i)) > 0)
# print out hashtable for inspection
for i in range(len(self.table.bins)):
print (i, self.table.bins[i])
# now the hashtable is completely full. Can't add any more
self.assertEquals(-11, self.table.add("s" + str(12)))
def test_badlinear(self):
"""linear with 0 must fail."""
self.table = Hashtable(b=11, probeFunction = lambda hk, size, i : (hk + 0) % size )
self.table.add(15)
self.assertTrue(self.table.contains(15))
# probes to same spot...
self.assertTrue(self.table.add(26) < 0)
def test_deletion(self):
self.table.add(15)
self.assertTrue(self.table.contains(15))
self.table.add(26)
self.assertTrue(self.table.contains(26))
self.table.delete(15)
self.assertTrue(self.table.contains(15) < 0)
self.assertTrue(self.table.contains(26))
