def test_unique_history_dict():
source = Stream()
s = source.unique(maxsize=2, hashable=False)
L = s.sink_to_list()
a = {'hi': 'world'}
b = {'hi': 'bar'}
c = {'foo': 'bar'}
source.emit(a)
source.emit(b)
source.emit(a)
source.emit(b)
source.emit(a)
source.emit(b)
assert L == [a, b]
source.emit(c)
source.emit(b)
assert L == [a, b, c]
source.emit(a)
assert L == [a, b, c, a]
def test_unique_metadata():
source = Stream()
L = metadata(source.unique()).flatten().sink_to_list()
for i in range(5):
source.emit(i, metadata=[{'v': i}])
assert L == [{'v': i} for i in range(5)]
def test_unique():
source = Stream()
L = source.unique().sink_to_list()
source.emit(1)
source.emit(2)
source.emit(1)
assert L == [1, 2]
def test_unique_key():
source = Stream()
L = source.unique(key=lambda x: x % 2, history=1).sink_to_list()
source.emit(1)
source.emit(2)
source.emit(4)
source.emit(6)
source.emit(3)
assert L == [1, 2, 3]
def test_unique_history():
source = Stream()
s = source.unique(maxsize=2)
s2 = source.unique(maxsize=2, hashable=False)
L = s.sink_to_list()
L2 = s2.sink_to_list()
source.emit(1)
source.emit(2)
source.emit(1)
source.emit(2)
source.emit(1)
source.emit(2)
assert L == [1, 2]
assert L == L2
source.emit(3)
source.emit(2)
assert L == [1, 2, 3]
assert L == L2
source.emit(1)
assert L == [1, 2, 3, 1]
assert L == L2
# update 2 position
source.emit(2)
# knock out 1
source.emit(3)
# update 2 position
source.emit(2)
assert L == [1, 2, 3, 1, 3]
assert L == L2
def test_unique_history():
source = Stream()
s = source.unique(history=2)
L = s.sink_to_list()
source.emit(1)
source.emit(2)
source.emit(1)
source.emit(2)
source.emit(1)
source.emit(2)
assert L == [1, 2]
source.emit(3)
source.emit(2)
assert L == [1, 2, 3]
source.emit(1)
assert L == [1, 2, 3, 1]
