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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
from __future__ import annotations
import logging
import re
from typing import TYPE_CHECKING
import numpy as np
import pytest
from contourpy import FillType, LineType, contour_generator
from contourpy.util.data import random
if TYPE_CHECKING:
from collections.abc import Iterator
from _pytest._py.path import LocalPath
from _pytest.logging import LogCaptureFixture
from selenium.webdriver.remote.webdriver import WebDriver
bokeh_renderer = pytest.importorskip("contourpy.util.bokeh_renderer")
@pytest.fixture(scope="session")
def driver(driver_path: str) -> Iterator[WebDriver]:
# Based on Bokeh's tests/support/plugins/selenium.py
def chrome() -> WebDriver:
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.chrome.webdriver import WebDriver as Chrome
options = Options()
options.add_argument("--headless")
options.add_argument("--no-sandbox")
if driver_path:
from selenium.webdriver.chrome.service import Service
service = Service(executable_path=driver_path)
return Chrome(options=options, service=service)
else:
return Chrome(options=options)
driver = chrome()
driver.implicitly_wait(10)
yield driver
driver.quit()
def test_chrome_version(driver: WebDriver) -> None:
# Print version of chrome used for export to PNG by Bokeh as test images, particularly those
# containing text, are sensitive to chrome version.
capabilities = driver.capabilities
print("Browser used by Bokeh:", capabilities["browserName"], capabilities["browserVersion"])
if "chrome" in capabilities:
print("Chromedriver:", capabilities["chrome"]["chromedriverVersion"])
@pytest.mark.image
@pytest.mark.text
@pytest.mark.parametrize("show_text", [False, True])
@pytest.mark.parametrize("fill_type", [*FillType.__members__.values(), "OuterCode"])
@pytest.mark.parametrize("multi", [False, True])
def test_renderer_filled_bokeh(
show_text: bool,
fill_type: FillType,
multi: bool,
driver: WebDriver,
) -> None:
from .image_comparison import compare_images
renderer = bokeh_renderer.BokehRenderer(ncols=2, figsize=(8, 3), show_frame=False)
x, y, z = random((3, 4), mask_fraction=0.35)
for ax, quad_as_tri in enumerate((False, True)):
cont_gen = contour_generator(x, y, z, fill_type=fill_type)
kwargs = {"alpha": 0.4} if quad_as_tri else {}
levels = np.linspace(0.0, 1.0, 11)
if multi:
multi_filled = cont_gen.multi_filled(levels)
renderer.multi_filled(multi_filled, fill_type, ax=ax, **kwargs)
else:
for i in range(len(levels)-1):
filled = cont_gen.filled(levels[i], levels[i+1])
renderer.filled(filled, fill_type, ax=ax, color=f"C{i}", **kwargs)
if quad_as_tri:
renderer.grid(x, y, ax=ax, alpha=0.5, quad_as_tri_alpha=0.5)
renderer.mask(x, y, z, ax=ax, color="red")
if show_text:
renderer.title("Title", ax=ax)
else:
renderer.grid(x, y, ax=ax, alpha=0.8, point_color="black")
if show_text:
renderer.title("Colored title", ax=ax, color="red")
image_buffer = renderer.save_to_buffer(webdriver=driver)
suffix = "" if show_text else "_no_text"
compare_images(
image_buffer, f"bokeh_renderer_filled{suffix}.png", f"{fill_type}_{multi}",
mean_threshold=0.03,
)
@pytest.mark.image
@pytest.mark.text
@pytest.mark.parametrize("show_text", [False, True])
@pytest.mark.parametrize("line_type", [*LineType.__members__.values(), "Separate"])
@pytest.mark.parametrize("multi", [False, True])
def test_renderer_lines_bokeh(
show_text: bool,
line_type: LineType,
multi: bool,
driver: WebDriver,
) -> None:
from .image_comparison import compare_images
renderer = bokeh_renderer.BokehRenderer(ncols=2, figsize=(8, 3), show_frame=show_text)
x, y, z = random((3, 4), mask_fraction=0.35)
for ax, quad_as_tri in enumerate((False, True)):
cont_gen = contour_generator(x, y, z, line_type=line_type)
kwargs = {"alpha": 0.5, "linewidth": 3} if quad_as_tri else {}
levels = np.linspace(0.1, 0.9, 9)
if multi:
multi_lines = cont_gen.multi_lines(levels)
renderer.multi_lines(multi_lines, line_type, ax=ax, **kwargs)
else:
for i in range(len(levels)):
lines = cont_gen.lines(levels[i])
renderer.lines(lines, line_type, ax=ax, color=f"C{i}", **kwargs)
if quad_as_tri:
renderer.grid(x, y, ax=ax, alpha=0.2, quad_as_tri_alpha=0.2)
renderer.mask(x, y, z, ax=ax, color="red")
if show_text:
renderer.z_values(x, y, z, ax=ax, fmt=".2f", quad_as_tri=True)
renderer.title("Title", ax=ax)
else:
renderer.grid(x, y, ax=ax, point_color="black")
if show_text:
renderer.z_values(x, y, z, ax=ax, fmt=".2f", color="blue")
renderer.title("Colored title", ax=ax, color="red")
image_buffer = renderer.save_to_buffer(webdriver=driver)
suffix = "" if show_text else "_no_text"
compare_images(
image_buffer, f"bokeh_renderer_lines{suffix}.png", f"{line_type}_{multi}",
mean_threshold=0.03,
)
@pytest.mark.image
@pytest.mark.parametrize("transparent", [False, True])
def test_save_png(
transparent: bool, tmpdir: LocalPath, driver: WebDriver, caplog: LogCaptureFixture,
) -> None:
from PIL import Image
renderer = bokeh_renderer.BokehRenderer(figsize=(4, 3), show_frame=False)
filename = (tmpdir / "bokeh.png").strpath
with caplog.at_level(logging.ERROR): # Hide Bokeh warnings about no renderers.
renderer.save(filename, transparent, webdriver=driver)
# Testing that a PNG file is produced of the correct size and format.
# Not testing the actual image produced except for the first pixel to confirm transparency.
with Image.open(filename) as image:
assert image.format == "PNG"
assert image.mode == "RGBA"
assert image.size == (400, 300)
rgba = image.getpixel((0, 0))
# Transparent background not working for PNG export.
# assert rgba[3] == 0 if transparent else 255
assert rgba[3] == 255
@pytest.mark.image
@pytest.mark.parametrize("transparent", [False, True])
def test_save_svg(
transparent: bool, tmpdir: LocalPath, driver: WebDriver, caplog: LogCaptureFixture,
) -> None:
renderer = bokeh_renderer.BokehRenderer(figsize=(4, 3), show_frame=False, want_svg=True)
renderer.grid(x=[0, 1, 2], y=[0, 1], alpha=0.5)
filename = (tmpdir / "bokeh.svg").strpath
renderer.save(filename, transparent, webdriver=driver)
# Rather simplistic check of SVG file contents.
with open(filename) as f:
svg = f.read()
assert svg[:5] == "<svg "
count = len(re.findall('path fill="#ffffff"', svg))
if transparent:
assert count == 0
else:
assert count == 2
|
