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TST: add timeouts to font_manager + threading test #28196

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Merged
merged 1 commit into from
May 24, 2024
Merged

TST: add timeouts to font_manager + threading test #28196

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11 changes: 9 additions & 2 deletions lib/matplotlib/tests/test_font_manager.py
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Original file line number Diff line number Diff line change
Expand Up @@ -253,11 +253,16 @@ def _test_threading():
from matplotlib.ft2font import LOAD_NO_HINTING
import matplotlib.font_manager as fm

def loud_excepthook(args):
raise RuntimeError("error in thread!")

threading.excepthook = loud_excepthook

N = 10
b = threading.Barrier(N)

def bad_idea(n):
b.wait()
b.wait(timeout=5)
for j in range(100):
font = fm.get_font(fm.findfont("DejaVu Sans"))
font.set_text(str(n), 0.0, flags=LOAD_NO_HINTING)
Expand All @@ -271,7 +276,9 @@ def bad_idea(n):
t.start()

for t in threads:
t.join()
t.join(timeout=9)
if t.is_alive():
raise RuntimeError("thread failed to join")


def test_fontcache_thread_safe():
Expand Down