def enumerate(self):
test_list = [1, 3, 2, 2, -1, 4]
res = Qi(test_list).enumerate().to_list()
assert res == [(0, 1), (1, 3), (2, 2), (3, 2), (4, -1), (5, 4)]
test_list = list('hello')
res = Qi(test_list).enumerate().to_list()
assert res == [(0, 'h'), (1, 'e'), (2, 'l'), (3, 'l'), (4, 'o')]
def test_sort(self):
test_list = [1, 3, 2, 2, -1, 4]
res = Qi(test_list).sort().to_list()
assert res == [-1, 1, 2, 2, 3, 4]
res = Qi(test_list).sort(key=lambda e: -e).to_list()
assert res == [4, 3, 2, 2, 1, -1]
res = Qi(test_list).sort(reverse=True).to_list()
assert res == [4, 3, 2, 2, 1, -1]
def test_min_max(self):
test_list = []
with self.assertRaises(ValueError) as context:
res = Qi(test_list).min() == 1
with self.assertRaises(ValueError) as context:
res = Qi(test_list).max() == 1
with self.assertRaises(ValueError) as context:
res = Qi(test_list).max(key=lambda e: -(e - 2)**2)
with self.assertRaises(ValueError) as context:
res = Qi(test_list).min(key=lambda e: (e - 2)**2)
def test_to_list(self):
test_list = []
res = Qi(test_list) \
.to_list()
assert res == []
def test_count_contains(self):
test_list = []
assert Qi(test_list).count() == 0
assert Qi(test_list).contains(2) == False
def test_first(self):
test_list = []
with self.assertRaises(StopIteration) as context:
res = Qi(test_list).first()
def test_filter(self):
test_list = []
res = Qi(test_list) \
.filter(lambda e: e >= 2) \
.to_list()
assert res == []
def test_map(self):
test_list = []
res = Qi(test_list) \
.map(lambda e: e**2) \
.to_list()
assert res == []
def test_filter(self):
test_list = [1, 3, 2, 2, -1, 4]
res = Qi(test_list) \
.filter(lambda e: e >= 2) \
.to_list()
assert res == [3, 2, 2, 4]
def test_distinct(self):
test_list = [1, 3, 2, 2, -1, 4]
res = Qi(test_list).distinct().to_list()
assert res == [1, 3, 2, -1, 4] # second 2 is dropped
def test_to_list(self):
test_list = [1, 3, 2, 2, -1, 4]
res = Qi(test_list) \
.to_list()
assert res == [1, 3, 2, 2, -1, 4]
def test_min_max(self):
test_list = [1, 3, 2, 2, -1, 4]
assert Qi(test_list).min() == -1
assert Qi(test_list).max() == 4
assert Qi(test_list).max(key=lambda e: -(e - 2)**2) == 2
assert Qi(test_list).min(key=lambda e: (e - 2)**2)
def test_count_contains(self):
test_list = [1, 3, 2, 2, -1, 4]
assert Qi(test_list).count() == 6
assert Qi(test_list).contains(2) == True
assert Qi(test_list).contains(13) == False
def test_first(self):
test_list = [1, 3, 2, 2, -1, 4]
assert Qi(test_list).first() == 1
def test_distinct(self):
test_list = []
res = Qi(test_list).distinct().to_list()
assert res == []
import unittest
from iter_query import Qi
from collections import defaultdict
def yield_trace(trace):
for i in 'MyExampleList':
print('trace {}'.format(i))
trace[i]+= 1
yield i
trace = defaultdict(int)
Qi(yield_trace(trace)).to_list()
trace = defaultdict(int)
Qi(yield_trace(trace)).take(5).to_list()
trace = defaultdict(int)
Qi(yield_trace(trace)).take(5).count()
trace = defaultdict(int)
Qi(yield_trace(trace)).max()
'a'.upper()
trace = defaultdict(int)
Qi(yield_trace(trace)) \
.filter(lambda e: e==e.upper()) \
.map(lambda e: e.lower()) \
.to_list()
def test_sort(self):
test_list = []
res = Qi(test_list).sort().to_list()
assert res == []
def test_map(self):
test_list = [1, 3, 2, 2, -1, 4]
res = Qi(test_list) \
.map(lambda e: e**2) \
.to_list()
assert res == [1, 9, 4, 4, 1, 16]