def test_left_join():
h1 = Hashtable()
h1.add("2", 2)
h1.add("3", 3)
h2 = Hashtable()
h2.add("2", 2)
h2.add("4", 4)
assert left_join(h1, h2) == [['3', 3, None], ['2', 2, 2]]
def test_contains():
Ĥ = Hashtable()
Ĥ.add("hash", "table")
assert Ĥ.contains("hash") == True
def test_add_and_get():
Ĥ = Hashtable()
Ĥ.add("hash", "table")
assert Ĥ.get("hash") == "table"
def test_hashtable_collision():
hashtable = Hashtable()
hashtable.add("key", "value1")
hashtable.add("yek", "value2")
assert hashtable._hash("key") == hashtable._hash("yek")
assert hashtable.get("key") == "value1"
assert hashtable.get("yek") == "value2"
def ht_right():
ht = Hashtable()
ht.add("fond", "averse")
ht.add("wrath", "delight")
ht.add("diligent", "idle")
ht.add("guide", "follow")
ht.add("flow", "jam")
return ht
def ht_left():
ht = Hashtable()
ht.add("fond", "enamored")
ht.add("wrath", "anger")
ht.add("diligent", "employed")
ht.add("outfit", "garb")
ht.add("guide", "usher")
return ht
def test_contains_many_first():
Ĥ = Hashtable()
Ĥ.add("hash", "table")
Ĥ.add("table", "hash")
Ĥ.add("linked", "list")
assert Ĥ.contains("linked") == True
def test_left_join_only_left(ht_left):
actual = left_join(ht_left, Hashtable())
expected = [
["outfit", "garb", None],
["guide", "usher", None],
["wrath", "anger", None],
["diligent", "employed", None],
["fond", "enamored", None],
]
assert actual == expected
def repeated_word(string):
ht = Hashtable()
valid = "abcdefghijklmnopqrstuvwxyz "
words = "".join(ch for ch in string.lower() if ch in valid).split()
for word in words:
if ht.contains(word):
return word
ht.add(word, word)
return ""
def repeated_word(strs):
strs = strs.lower()
for ch in strs:
if ch not in ABC_dict:
strs.replace(ch, '')
str_lst = strs.split(" ")
ht = Hashtable()
for string in str_lst:
if ht.contains(string):
return string
else:
ht.add(string, string)
return None
def test_hashtable_add_and_get():
hashtable = Hashtable()
hashtable.add("key", "value")
assert hashtable.get("key") == "value"
def test_hashtable_get_none_key():
hashtable = Hashtable()
assert hashtable.get("key") == None
def test_hashtable_create():
hashtable = Hashtable()
assert hashtable
def test_hashtable_different_hash():
hashtable = Hashtable()
initial = hashtable._hash("glisten")
secondary = hashtable._hash("silent")
assert initial != secondary
def test_hashtable_same_hash():
hashtable = Hashtable()
initial = hashtable._hash("listen")
secondary = hashtable._hash("silent")
assert initial == secondary
def test_hashtable_in_range_hash():
hashtable = Hashtable()
actual = hashtable._hash("spam")
assert 0 <= actual < hashtable.size
def tree_intersection(bn1, bn2):
ht = Hashtable()
for n in bn1.pre_order():
ht.add(n, n)
return [n for n in bn2.pre_order() if ht.contains(n)]
def test_hash_different():
Ĥ = Hashtable()
assert not Ĥ.hash("hash") == Ĥ.hash("table")
def test_hashtable_contains():
hashtable = Hashtable()
hashtable.add("key", "value")
assert hashtable.contains("key") == True
def test_hashtable():
assert Hashtable()
def test_left_join_only_right(ht_right):
actual = left_join(Hashtable(), ht_right)
expected = []
assert actual == expected
def test_get_none():
Ĥ = Hashtable()
assert Ĥ.get("hash") == None
def test_left_join_both_empty():
actual = left_join(Hashtable(), Hashtable())
expected = []
assert actual == expected
def test_hashtable_predictable_hash():
hashtable = Hashtable()
initial = hashtable._hash("spam")
secondary = hashtable._hash("spam")
assert initial == secondary
def test_hash():
Ĥ = Hashtable()
assert Ĥ.hash("hash") == Ĥ.hash("hash")