pyqtgraph/tests/exporters/test_csv.py
Ogi Moore e7a30b9324 Clean up test files
Remove if __name__ == "__main__" bits, replace some == None to is None
checks

Cleanup variety of static code checker issue

Removed missing imports, restructured some logic to make a little
cleaner, fixed a function in test_dockarea, unfortunately broke the test
so now I tell pytest to expect the Exception.
2021-05-31 21:06:16 -07:00

53 lines
1.6 KiB
Python

"""
CSV export test
"""
from __future__ import division, print_function, absolute_import
import pyqtgraph as pg
import csv
import os
import tempfile
app = pg.mkQApp()
def approxeq(a, b):
return (a-b) <= ((a + b) * 1e-6)
def test_CSVExporter():
tempfilename = tempfile.NamedTemporaryFile(suffix='.csv').name
print("using %s as a temporary file" % tempfilename)
plt = pg.plot()
y1 = [1,3,2,3,1,6,9,8,4,2]
plt.plot(y=y1, name='myPlot')
y2 = [3,4,6,1,2,4,2,3,5,3,5,1,3]
x2 = pg.np.linspace(0, 1.0, len(y2))
plt.plot(x=x2, y=y2)
y3 = [1,5,2,3,4,6,1,2,4,2,3,5,3]
x3 = pg.np.linspace(0, 1.0, len(y3)+1)
plt.plot(x=x3, y=y3, stepMode="center")
ex = pg.exporters.CSVExporter(plt.plotItem)
ex.export(fileName=tempfilename)
with open(tempfilename, 'r') as csv_file:
r = csv.reader(csv_file)
lines = [line for line in r]
header = lines.pop(0)
assert header == ['myPlot_x', 'myPlot_y', 'x0001', 'y0001', 'x0002', 'y0002']
for i, vals in enumerate(lines):
vals = list(map(str.strip, vals))
assert (i >= len(y1) and vals[0] == '') or approxeq(float(vals[0]), i)
assert (i >= len(y1) and vals[1] == '') or approxeq(float(vals[1]), y1[i])
assert (i >= len(x2) and vals[2] == '') or approxeq(float(vals[2]), x2[i])
assert (i >= len(y2) and vals[3] == '') or approxeq(float(vals[3]), y2[i])
assert (i >= len(x3) and vals[4] == '') or approxeq(float(vals[4]), x3[i])
assert (i >= len(y3) and vals[5] == '') or approxeq(float(vals[5]), y3[i])
os.unlink(tempfilename)