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from __future__ import annotations
import sys
import pytest
from PIL import Image
from .helper import is_pypy
def test_get_stats() -> None:
# Create at least one image
Image.new("RGB", (10, 10))
stats = Image.core.get_stats()
assert "new_count" in stats
assert "reused_blocks" in stats
assert "freed_blocks" in stats
assert "allocated_blocks" in stats
assert "reallocated_blocks" in stats
assert "blocks_cached" in stats
def test_reset_stats() -> None:
Image.core.reset_stats()
stats = Image.core.get_stats()
assert stats["new_count"] == 0
assert stats["reused_blocks"] == 0
assert stats["freed_blocks"] == 0
assert stats["allocated_blocks"] == 0
assert stats["reallocated_blocks"] == 0
assert stats["blocks_cached"] == 0
class TestCoreMemory:
def teardown_method(self) -> None:
# Restore default values
Image.core.set_alignment(1)
Image.core.set_block_size(1024 * 1024)
Image.core.set_blocks_max(0)
Image.core.clear_cache()
def test_get_alignment(self) -> None:
alignment = Image.core.get_alignment()
assert alignment > 0
def test_set_alignment(self) -> None:
for i in [1, 2, 4, 8, 16, 32]:
Image.core.set_alignment(i)
alignment = Image.core.get_alignment()
assert alignment == i
# Try to construct new image
Image.new("RGB", (10, 10))
with pytest.raises(ValueError):
Image.core.set_alignment(0)
with pytest.raises(ValueError):
Image.core.set_alignment(-1)
with pytest.raises(ValueError):
Image.core.set_alignment(3)
def test_get_block_size(self) -> None:
block_size = Image.core.get_block_size()
assert block_size >= 4096
def test_set_block_size(self) -> None:
for i in [4096, 2 * 4096, 3 * 4096]:
Image.core.set_block_size(i)
block_size = Image.core.get_block_size()
assert block_size == i
# Try to construct new image
Image.new("RGB", (10, 10))
with pytest.raises(ValueError):
Image.core.set_block_size(0)
with pytest.raises(ValueError):
Image.core.set_block_size(-1)
with pytest.raises(ValueError):
Image.core.set_block_size(4000)
def test_set_block_size_stats(self) -> None:
Image.core.reset_stats()
Image.core.set_blocks_max(0)
Image.core.set_block_size(4096)
Image.new("RGB", (256, 256))
stats = Image.core.get_stats()
assert stats["new_count"] >= 1
assert stats["allocated_blocks"] >= 64
if not is_pypy():
assert stats["freed_blocks"] >= 64
def test_get_blocks_max(self) -> None:
blocks_max = Image.core.get_blocks_max()
assert blocks_max >= 0
def test_set_blocks_max(self) -> None:
for i in [0, 1, 10]:
Image.core.set_blocks_max(i)
blocks_max = Image.core.get_blocks_max()
assert blocks_max == i
# Try to construct new image
Image.new("RGB", (10, 10))
with pytest.raises(ValueError):
Image.core.set_blocks_max(-1)
if sys.maxsize < 2**32:
with pytest.raises(ValueError):
Image.core.set_blocks_max(2**29)
@pytest.mark.skipif(is_pypy(), reason="Images not collected")
def test_set_blocks_max_stats(self) -> None:
Image.core.reset_stats()
Image.core.set_blocks_max(128)
Image.core.set_block_size(4096)
Image.new("RGB", (256, 256))
Image.new("RGB", (256, 256))
stats = Image.core.get_stats()
assert stats["new_count"] >= 2
assert stats["allocated_blocks"] >= 64
assert stats["reused_blocks"] >= 64
assert stats["freed_blocks"] == 0
assert stats["blocks_cached"] == 64
@pytest.mark.skipif(is_pypy(), reason="Images not collected")
def test_clear_cache_stats(self) -> None:
Image.core.reset_stats()
Image.core.clear_cache()
Image.core.set_blocks_max(128)
Image.core.set_block_size(4096)
Image.new("RGB", (256, 256))
Image.new("RGB", (256, 256))
# Keep 16 blocks in cache
Image.core.clear_cache(16)
stats = Image.core.get_stats()
assert stats["new_count"] >= 2
assert stats["allocated_blocks"] >= 64
assert stats["reused_blocks"] >= 64
assert stats["freed_blocks"] >= 48
assert stats["blocks_cached"] == 16
def test_large_images(self) -> None:
Image.core.reset_stats()
Image.core.set_blocks_max(0)
Image.core.set_block_size(4096)
Image.new("RGB", (2048, 16))
Image.core.clear_cache()
stats = Image.core.get_stats()
assert stats["new_count"] >= 1
assert stats["allocated_blocks"] >= 16
assert stats["reused_blocks"] >= 0
assert stats["blocks_cached"] == 0
if not is_pypy():
assert stats["freed_blocks"] >= 16
class TestEnvVars:
def teardown_method(self) -> None:
# Restore default values
Image.core.set_alignment(1)
Image.core.set_block_size(1024 * 1024)
Image.core.set_blocks_max(0)
Image.core.clear_cache()
def test_units(self) -> None:
Image._apply_env_variables({"PILLOW_BLOCKS_MAX": "2K"})
assert Image.core.get_blocks_max() == 2 * 1024
Image._apply_env_variables({"PILLOW_BLOCK_SIZE": "2m"})
assert Image.core.get_block_size() == 2 * 1024 * 1024
@pytest.mark.parametrize(
"var",
(
{"PILLOW_ALIGNMENT": "15"},
{"PILLOW_BLOCK_SIZE": "1024"},
{"PILLOW_BLOCKS_MAX": "wat"},
),
)
def test_warnings(self, var: dict[str, str]) -> None:
with pytest.warns(UserWarning, match=list(var)[0]):
Image._apply_env_variables(var)
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