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#!/usr/bin/env python
import unittest
from dataclasses import dataclass, field
from argaze import DataStructures
def random_data_buffer(size, data_keys):
""" Generate a random TimeStampedBuffer for testing purpose.
Timestamps are current time.
Values are tuples containing an expected value and a random value.
"""
import random
import time
ts_buffer = DataStructures.TimeStampedBuffer()
for i in range(0, size):
# Edit data
random_data = {}
for key in data_keys:
random_data[key] = (i, random.random())
# Store data
ts_buffer[time.time()] = random_data
return ts_buffer
@dataclass()
class BasicDataClass():
"""Define a basic dataclass for testing purpose."""
value: tuple
class TestTimeStampedBufferClass(unittest.TestCase):
"""Test TimeStampedBuffer class."""
def test_new(self):
"""Test TimeStampedBuffer creation."""
# Check TimeStampedBuffer length after creation
self.assertEqual(len(DataStructures.TimeStampedBuffer()), 0)
self.assertEqual(len(DataStructures.TimeStampedBuffer({0: ""})), 1)
self.assertEqual(len(DataStructures.TimeStampedBuffer({0.1: ""})), 1)
self.assertEqual(len(DataStructures.TimeStampedBuffer({0: "A", 1: "B"})), 2)
# Check TimeStampedBuffer keys after creation
self.assertEqual(list(DataStructures.TimeStampedBuffer().keys()), [])
self.assertEqual(list(DataStructures.TimeStampedBuffer({0: ""}).keys()), [0])
self.assertEqual(list(DataStructures.TimeStampedBuffer({0.1: ""}).keys()), [0.1])
self.assertEqual(list(DataStructures.TimeStampedBuffer({0: "A", 1: "B"}).keys()), [0, 1])
# Check TimeStampedBuffer items after creation
self.assertEqual(list(DataStructures.TimeStampedBuffer().items()), [])
self.assertEqual(list(DataStructures.TimeStampedBuffer({0: ""}).items()), [(0, "")])
self.assertEqual(list(DataStructures.TimeStampedBuffer({0.1: ""}).items()), [(0.1, "")])
self.assertEqual(list(DataStructures.TimeStampedBuffer({0: "A", 1: "B"}).items()), [(0, "A"), (1, "B")])
# Check that TimeStampedBuffer creation fails when keys are not numbers
with self.assertRaises(AssertionError):
DataStructures.TimeStampedBuffer({"first": ""})
def test___repr__(self):
"""Test TimeStampedBuffer string representation."""
self.assertEqual(repr(DataStructures.TimeStampedBuffer()), "{}")
self.assertEqual(repr(DataStructures.TimeStampedBuffer({0: ""})), "{\"0\": \"\"}")
self.assertEqual(repr(DataStructures.TimeStampedBuffer({0.1: ""})), "{\"0.1\": \"\"}")
data = BasicDataClass((123, 456))
ts_buffer = DataStructures.TimeStampedBuffer({0: data})
self.assertEqual(repr(ts_buffer), "{\"0\": {\"value\": [123, 456]}}")
def test_append(self):
"""Test TimeStampedBuffer append method."""
ts_buffer = DataStructures.TimeStampedBuffer({0: "A", 1: "B"})
ts_buffer_next = DataStructures.TimeStampedBuffer({2: "C", 3: "D"})
self.assertEqual(len(ts_buffer.append(ts_buffer_next)), 4)
self.assertEqual(list(ts_buffer.append(ts_buffer_next).keys()), [0, 1, 2, 3])
def test_first(self):
"""Test TimeStampedBuffer first property."""
self.assertEqual(DataStructures.TimeStampedBuffer({0: "A", 1: "B"}).first, (0, "A"))
# Check that accessing to first item of an empty TimeStampedBuffer fails
with self.assertRaises(IndexError):
DataStructures.TimeStampedBuffer().first
def test_pop_first(self):
"""Test TimeStampedBuffer pop_first method."""
ts_buffer = DataStructures.TimeStampedBuffer({0: "A", 1: "B"})
self.assertEqual(ts_buffer.pop_first(), (0, "A"))
self.assertEqual(len(ts_buffer), 1)
self.assertEqual(ts_buffer.first, (1, "B"))
def test_pop_first_until(self):
"""Test TimeStampedBuffer pop_first_until method."""
ts_buffer = DataStructures.TimeStampedBuffer({0: "A", 1: "B", 2: "C", 3: "D"})
# Check pop until an existing timestamp
first_until_2 = ts_buffer.pop_first_until(2)
self.assertEqual(first_until_2, (1, "B"))
self.assertEqual(len(ts_buffer), 2)
self.assertEqual(ts_buffer.first, (2, "C"))
# Check pop until an none existing timestamp
ts_buffer = DataStructures.TimeStampedBuffer({0: "A", 1: "B", 2: "C", 3: "D"})
first_until_1dot5 = ts_buffer.pop_first_until(1.5)
self.assertEqual(first_until_1dot5, (1, "B"))
self.assertEqual(len(ts_buffer), 2)
self.assertEqual(ts_buffer.first, (2, "C"))
def test_last(self):
"""Test TimeStampedBuffer last property."""
self.assertEqual(DataStructures.TimeStampedBuffer({0: "A", 1: "B"}).last, (1, "B"))
# Check that accessing to last item of an empty TimeStampedBuffer fails
with self.assertRaises(IndexError):
DataStructures.TimeStampedBuffer().last
def test_pop_last(self):
"""Test TimeStampedBuffer pop_last method."""
ts_buffer = DataStructures.TimeStampedBuffer({0: "A", 1: "B"})
self.assertEqual(ts_buffer.pop_last(), (1, "B"))
self.assertEqual(len(ts_buffer), 1)
self.assertEqual(ts_buffer.last, (0, "A"))
def test_get_last_before(self):
"""Test TimeStampedBuffer get_last_before method."""
ts_buffer = DataStructures.TimeStampedBuffer({0: "A", 1: "B", 2: "C", 3: "D"})
get_last_before_2 = ts_buffer.get_last_before(2)
self.assertEqual(get_last_before_2, (1, "B"))
self.assertEqual(len(ts_buffer), 4)
get_last_before_1dot5 = ts_buffer.get_last_before(1.5)
self.assertEqual(get_last_before_1dot5, (1, "B"))
get_last_before_4 = ts_buffer.get_last_before(4)
self.assertEqual(get_last_before_4, (3, "D"))
# Check that accessing to early timestamp fails
with self.assertRaises(KeyError):
ts_buffer.get_last_before(-1)
def test_as_dataframe(self):
"""Test TimeStampedBuffer as_dataframe method."""
ts_buffer = random_data_buffer(10, ["data_A", "data_B", "data_C"])
# Check dataframe conversion
ts_buffer_dataframe = ts_buffer.as_dataframe()
self.assertEqual(ts_buffer_dataframe.index.name, "timestamp")
self.assertEqual(ts_buffer_dataframe.index.size, 10)
self.assertEqual(ts_buffer_dataframe.columns.size, 3)
self.assertEqual(ts_buffer_dataframe.columns[0], "data_A")
self.assertEqual(ts_buffer_dataframe.columns[1], "data_B")
self.assertEqual(ts_buffer_dataframe.columns[2], "data_C")
self.assertEqual(ts_buffer_dataframe.index.dtype, 'float64')
self.assertEqual(ts_buffer_dataframe["data_A"].dtype, 'object')
self.assertEqual(ts_buffer_dataframe["data_B"].dtype, 'object')
self.assertEqual(ts_buffer_dataframe["data_C"].dtype, 'object')
# Check data exclusion option
ts_buffer_dataframe = ts_buffer.as_dataframe(exclude=["data_B"])
self.assertEqual(ts_buffer_dataframe.index.name, "timestamp")
self.assertEqual(ts_buffer_dataframe.index.size, 10)
self.assertEqual(ts_buffer_dataframe.columns.size, 2)
self.assertEqual(ts_buffer_dataframe.columns[0], "data_A")
self.assertEqual(ts_buffer_dataframe.columns[1], "data_C")
# Check dataframe split option
ts_buffer_dataframe = ts_buffer.as_dataframe(split={"data_B": ["data_B0", "data_B1"]})
self.assertEqual(ts_buffer_dataframe.index.name, "timestamp")
self.assertEqual(ts_buffer_dataframe.index.size, 10)
self.assertEqual(ts_buffer_dataframe.columns.size, 4)
self.assertEqual(ts_buffer_dataframe.columns[0], "data_A")
self.assertEqual(ts_buffer_dataframe.columns[1], "data_B0")
self.assertEqual(ts_buffer_dataframe.columns[2], "data_B1")
self.assertEqual(ts_buffer_dataframe.columns[3], "data_C")
# Check dataframe conversion with dataclass
data = BasicDataClass((123, 456))
ts_buffer_dataframe = DataStructures.TimeStampedBuffer({0: data}).as_dataframe()
self.assertEqual(ts_buffer_dataframe.index.name, "timestamp")
self.assertEqual(ts_buffer_dataframe.index.size, 1)
self.assertEqual(ts_buffer_dataframe.columns.size, 1)
self.assertEqual(ts_buffer_dataframe.columns[0], "value")
if __name__ == '__main__':
unittest.main()
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