Module grscheller.datastructures.tests.dqueue_test
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# Copyright 2023 Geoffrey R. Scheller
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from grscheller.datastructures.dqueue import Dqueue
from grscheller.datastructures.functional import Maybe, Nothing
class TestDqueue:
def test_push_then_pop(self):
dq = Dqueue()
pushed = 42; dq.pushL(pushed)
popped = dq.popL().get()
assert pushed == popped
assert len(dq) == 0
assert dq.popL().getOrElse(42) == 42
pushed = 0; dq.pushL(pushed)
popped = dq.popR().getOrElse(42)
assert pushed == popped == 0
assert not dq
pushed = 0; dq.pushR(pushed)
popped = dq.popL().get()
assert popped is not None
assert pushed == popped
assert len(dq) == 0
pushed = ''; dq.pushR(pushed)
popped = dq.popR().get()
assert pushed == popped
assert len(dq) == 0
dq.pushR('first').pushR('second').pushR('last')
assert dq.popL().get() == 'first'
assert dq.popR().get() == 'last'
assert dq
dq.popL()
assert len(dq) == 0
def test_iterators(self):
data = [1, 2, 3, 4]
dq = Dqueue(*data)
ii = 0
for item in dq:
assert data[ii] == item
ii += 1
assert ii == 4
data.append(5)
dq = Dqueue(*data)
data.reverse()
ii = 0
for item in reversed(dq):
assert data[ii] == item
ii += 1
assert ii == 5
dq0 = Dqueue()
for _ in dq0:
assert False
for _ in reversed(dq0):
assert False
data = ()
dq0 = Dqueue(*data)
for _ in dq0:
assert False
for _ in reversed(dq0):
assert False
def test_capacity(self):
dq = Dqueue(1, 2)
assert dq.fractionFilled() == 2/2
dq.pushL(0)
assert dq.fractionFilled() == 3/4
dq.pushR(3)
assert dq.fractionFilled() == 4/4
dq.pushR(4)
assert dq.fractionFilled() == 5/8
assert len(dq) == 5
assert dq.capacity() == 8
dq.resize()
assert dq.fractionFilled() == 5/5
dq.resize(20)
assert dq.fractionFilled() == 5/25
def test_equality(self):
dq1 = Dqueue(1, 2, 3, 'Forty-Two', (7, 11, 'foobar'))
dq2 = Dqueue(2, 3, 'Forty-Two').pushL(1).pushR((7, 11, 'foobar'))
assert dq1 == dq2
tup2 = dq2.popR().getOrElse((42, 'Hitchhiker'))
assert dq1 != dq2
dq2.pushR((42, 'foofoo'))
assert dq1 != dq2
dq1.popR().getOrElse((38, 'Nami'))
dq1.pushR((42, 'foofoo')).pushR(tup2)
dq2.pushR(tup2)
assert dq1 == dq2
holdA = dq1.popL().getOrElse(666)
dq1.resize(42)
holdB = dq1.popL().getOrElse(777)
holdC = dq1.popR().getOrElse(888)
dq1.pushL(holdB).pushR(holdC).pushL(holdA).pushL(200)
dq2.pushL(200)
assert dq1 == dq2
def test_maybe(self):
dq1 = Dqueue()
m42 = dq1.pushL(42).popR()
mNot = dq1.popR()
assert m42 == Maybe(42)
assert m42 != Maybe(21)
assert m42.getOrElse(21) == 42
assert m42.getOrElse(21) != 21
assert m42.get() == 42
assert m42.get() != 21
assert mNot.getOrElse(21) == 21
assert mNot == Nothing
assert mNot.get() == None
def test_mapAndFlatMap(self):
dq1 = Dqueue(1,2,3,10)
dq1_answers = Dqueue(0,3,8,99)
assert dq1.map(lambda x: x*x-1) == dq1_answers
dq2 = dq1.flatMap(lambda x: Dqueue(1, x, x*x+1))
dq2_answers = Dqueue(1, 1, 2, 1, 2, 5, 1, 3, 10, 1, 10, 101)
assert dq2 == dq2_answers
Classes
class TestDqueue
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Expand source code
class TestDqueue: def test_push_then_pop(self): dq = Dqueue() pushed = 42; dq.pushL(pushed) popped = dq.popL().get() assert pushed == popped assert len(dq) == 0 assert dq.popL().getOrElse(42) == 42 pushed = 0; dq.pushL(pushed) popped = dq.popR().getOrElse(42) assert pushed == popped == 0 assert not dq pushed = 0; dq.pushR(pushed) popped = dq.popL().get() assert popped is not None assert pushed == popped assert len(dq) == 0 pushed = ''; dq.pushR(pushed) popped = dq.popR().get() assert pushed == popped assert len(dq) == 0 dq.pushR('first').pushR('second').pushR('last') assert dq.popL().get() == 'first' assert dq.popR().get() == 'last' assert dq dq.popL() assert len(dq) == 0 def test_iterators(self): data = [1, 2, 3, 4] dq = Dqueue(*data) ii = 0 for item in dq: assert data[ii] == item ii += 1 assert ii == 4 data.append(5) dq = Dqueue(*data) data.reverse() ii = 0 for item in reversed(dq): assert data[ii] == item ii += 1 assert ii == 5 dq0 = Dqueue() for _ in dq0: assert False for _ in reversed(dq0): assert False data = () dq0 = Dqueue(*data) for _ in dq0: assert False for _ in reversed(dq0): assert False def test_capacity(self): dq = Dqueue(1, 2) assert dq.fractionFilled() == 2/2 dq.pushL(0) assert dq.fractionFilled() == 3/4 dq.pushR(3) assert dq.fractionFilled() == 4/4 dq.pushR(4) assert dq.fractionFilled() == 5/8 assert len(dq) == 5 assert dq.capacity() == 8 dq.resize() assert dq.fractionFilled() == 5/5 dq.resize(20) assert dq.fractionFilled() == 5/25 def test_equality(self): dq1 = Dqueue(1, 2, 3, 'Forty-Two', (7, 11, 'foobar')) dq2 = Dqueue(2, 3, 'Forty-Two').pushL(1).pushR((7, 11, 'foobar')) assert dq1 == dq2 tup2 = dq2.popR().getOrElse((42, 'Hitchhiker')) assert dq1 != dq2 dq2.pushR((42, 'foofoo')) assert dq1 != dq2 dq1.popR().getOrElse((38, 'Nami')) dq1.pushR((42, 'foofoo')).pushR(tup2) dq2.pushR(tup2) assert dq1 == dq2 holdA = dq1.popL().getOrElse(666) dq1.resize(42) holdB = dq1.popL().getOrElse(777) holdC = dq1.popR().getOrElse(888) dq1.pushL(holdB).pushR(holdC).pushL(holdA).pushL(200) dq2.pushL(200) assert dq1 == dq2 def test_maybe(self): dq1 = Dqueue() m42 = dq1.pushL(42).popR() mNot = dq1.popR() assert m42 == Maybe(42) assert m42 != Maybe(21) assert m42.getOrElse(21) == 42 assert m42.getOrElse(21) != 21 assert m42.get() == 42 assert m42.get() != 21 assert mNot.getOrElse(21) == 21 assert mNot == Nothing assert mNot.get() == None def test_mapAndFlatMap(self): dq1 = Dqueue(1,2,3,10) dq1_answers = Dqueue(0,3,8,99) assert dq1.map(lambda x: x*x-1) == dq1_answers dq2 = dq1.flatMap(lambda x: Dqueue(1, x, x*x+1)) dq2_answers = Dqueue(1, 1, 2, 1, 2, 5, 1, 3, 10, 1, 10, 101) assert dq2 == dq2_answers
Methods
def test_capacity(self)
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def test_capacity(self): dq = Dqueue(1, 2) assert dq.fractionFilled() == 2/2 dq.pushL(0) assert dq.fractionFilled() == 3/4 dq.pushR(3) assert dq.fractionFilled() == 4/4 dq.pushR(4) assert dq.fractionFilled() == 5/8 assert len(dq) == 5 assert dq.capacity() == 8 dq.resize() assert dq.fractionFilled() == 5/5 dq.resize(20) assert dq.fractionFilled() == 5/25
def test_equality(self)
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def test_equality(self): dq1 = Dqueue(1, 2, 3, 'Forty-Two', (7, 11, 'foobar')) dq2 = Dqueue(2, 3, 'Forty-Two').pushL(1).pushR((7, 11, 'foobar')) assert dq1 == dq2 tup2 = dq2.popR().getOrElse((42, 'Hitchhiker')) assert dq1 != dq2 dq2.pushR((42, 'foofoo')) assert dq1 != dq2 dq1.popR().getOrElse((38, 'Nami')) dq1.pushR((42, 'foofoo')).pushR(tup2) dq2.pushR(tup2) assert dq1 == dq2 holdA = dq1.popL().getOrElse(666) dq1.resize(42) holdB = dq1.popL().getOrElse(777) holdC = dq1.popR().getOrElse(888) dq1.pushL(holdB).pushR(holdC).pushL(holdA).pushL(200) dq2.pushL(200) assert dq1 == dq2
def test_iterators(self)
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def test_iterators(self): data = [1, 2, 3, 4] dq = Dqueue(*data) ii = 0 for item in dq: assert data[ii] == item ii += 1 assert ii == 4 data.append(5) dq = Dqueue(*data) data.reverse() ii = 0 for item in reversed(dq): assert data[ii] == item ii += 1 assert ii == 5 dq0 = Dqueue() for _ in dq0: assert False for _ in reversed(dq0): assert False data = () dq0 = Dqueue(*data) for _ in dq0: assert False for _ in reversed(dq0): assert False
def test_mapAndFlatMap(self)
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def test_mapAndFlatMap(self): dq1 = Dqueue(1,2,3,10) dq1_answers = Dqueue(0,3,8,99) assert dq1.map(lambda x: x*x-1) == dq1_answers dq2 = dq1.flatMap(lambda x: Dqueue(1, x, x*x+1)) dq2_answers = Dqueue(1, 1, 2, 1, 2, 5, 1, 3, 10, 1, 10, 101) assert dq2 == dq2_answers
def test_maybe(self)
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def test_maybe(self): dq1 = Dqueue() m42 = dq1.pushL(42).popR() mNot = dq1.popR() assert m42 == Maybe(42) assert m42 != Maybe(21) assert m42.getOrElse(21) == 42 assert m42.getOrElse(21) != 21 assert m42.get() == 42 assert m42.get() != 21 assert mNot.getOrElse(21) == 21 assert mNot == Nothing assert mNot.get() == None
def test_push_then_pop(self)
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def test_push_then_pop(self): dq = Dqueue() pushed = 42; dq.pushL(pushed) popped = dq.popL().get() assert pushed == popped assert len(dq) == 0 assert dq.popL().getOrElse(42) == 42 pushed = 0; dq.pushL(pushed) popped = dq.popR().getOrElse(42) assert pushed == popped == 0 assert not dq pushed = 0; dq.pushR(pushed) popped = dq.popL().get() assert popped is not None assert pushed == popped assert len(dq) == 0 pushed = ''; dq.pushR(pushed) popped = dq.popR().get() assert pushed == popped assert len(dq) == 0 dq.pushR('first').pushR('second').pushR('last') assert dq.popL().get() == 'first' assert dq.popR().get() == 'last' assert dq dq.popL() assert len(dq) == 0