forked from fotisj/pydelta
/
deltas_test.py
63 lines (48 loc) · 2.12 KB
/
deltas_test.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
import delta as d
import os
# from nose.tools import eq_
from math import log10, pow
testdir = None
c1000 = None
def setup_module():
global testdir
global c1000
testdir = os.path.join(
os.path.dirname(
os.path.abspath(__file__)),
'corpus3')
c1000 = d.Corpus(testdir).get_mfw_table(1000)
def feq_(result, expected, msg=None, threshold=None):
if threshold is None:
threshold = pow(10, log10(expected)-2)
if msg is None:
msg = "{} != {}".format(result, expected)
assert abs(expected - result) < threshold, msg
class Delta_Test:
def check_function(self, function, expected_distance, expected_score=None):
distances = function(c1000)
sample = distances.at['Fontane,-Theodor_Der-Stechlin',
'Fontane,-Theodor_Effi-Briest']
feq_(sample, expected_distance,
"{} Stechlin/Effi distance is {} instead of {}!".format(
function.name, sample, expected_distance))
if expected_score is not None:
feq_(expected_score, distances.simple_score(),
"{} simple score is {} instead of expected {}!".format(
function.name, distances.simple_score(), expected_score))
def burrows_test(self):
self.check_function(d.functions.burrows, 0.7538867972199293)
def linear_test(self):
self.check_function(d.functions.linear, 1149.434663563308)
def quadratic_test(self):
self.check_function(d.functions.quadratic, 1102.845003724634)
def eder_test(self):
self.check_function(d.functions.eder, 0.3703309813454142)
def cosine_delta_test(self):
self.check_function(d.functions.cosine_delta, 0.6156353166442046)
def composite_metric_test(self):
mcosine = d.MetricDeltaFunction('cosine', 'mcosine')
assert mcosine.fix_symmetry == True, "fix_symmetry is False!?"
mcd = d.CompositeDeltaFunction('mcosine-z_score', 'metric_cosine_delta')
assert mcd.basis.fix_symmetry == True, "basis.fix_symmetry is False!?"
self.check_function(d.functions.metric_cosine_delta, 0.6156353166442046)