mirror of
https://github.com/python-pillow/Pillow.git
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215 lines
7.4 KiB
Python
215 lines
7.4 KiB
Python
from __future__ import annotations
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import pytest
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from PIL import Image, ImageMath
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def pixel(im):
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if hasattr(im, "im"):
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return f"{im.mode} {repr(im.getpixel((0, 0)))}"
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if isinstance(im, int):
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return int(im) # hack to deal with booleans
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A = Image.new("L", (1, 1), 1)
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B = Image.new("L", (1, 1), 2)
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Z = Image.new("L", (1, 1), 0) # Z for zero
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F = Image.new("F", (1, 1), 3)
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I = Image.new("I", (1, 1), 4) # noqa: E741
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A2 = A.resize((2, 2))
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B2 = B.resize((2, 2))
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images = {"A": A, "B": B, "F": F, "I": I}
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def test_sanity():
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assert ImageMath.eval("1") == 1
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assert ImageMath.eval("1+A", A=2) == 3
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assert pixel(ImageMath.eval("A+B", A=A, B=B)) == "I 3"
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assert pixel(ImageMath.eval("A+B", images)) == "I 3"
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assert pixel(ImageMath.eval("float(A)+B", images)) == "F 3.0"
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assert pixel(ImageMath.eval("int(float(A)+B)", images)) == "I 3"
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def test_ops():
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assert pixel(ImageMath.eval("-A", images)) == "I -1"
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assert pixel(ImageMath.eval("+B", images)) == "L 2"
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assert pixel(ImageMath.eval("A+B", images)) == "I 3"
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assert pixel(ImageMath.eval("A-B", images)) == "I -1"
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assert pixel(ImageMath.eval("A*B", images)) == "I 2"
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assert pixel(ImageMath.eval("A/B", images)) == "I 0"
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assert pixel(ImageMath.eval("B**2", images)) == "I 4"
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assert pixel(ImageMath.eval("B**33", images)) == "I 2147483647"
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assert pixel(ImageMath.eval("float(A)+B", images)) == "F 3.0"
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assert pixel(ImageMath.eval("float(A)-B", images)) == "F -1.0"
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assert pixel(ImageMath.eval("float(A)*B", images)) == "F 2.0"
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assert pixel(ImageMath.eval("float(A)/B", images)) == "F 0.5"
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assert pixel(ImageMath.eval("float(B)**2", images)) == "F 4.0"
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assert pixel(ImageMath.eval("float(B)**33", images)) == "F 8589934592.0"
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@pytest.mark.parametrize(
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"expression",
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(
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"exec('pass')",
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"(lambda: exec('pass'))()",
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"(lambda: (lambda: exec('pass'))())()",
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),
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)
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def test_prevent_exec(expression):
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with pytest.raises(ValueError):
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ImageMath.eval(expression)
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def test_prevent_double_underscores():
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with pytest.raises(ValueError):
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ImageMath.eval("1", {"__": None})
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def test_prevent_builtins():
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with pytest.raises(ValueError):
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ImageMath.eval("(lambda: exec('exit()'))()", {"exec": None})
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def test_logical():
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assert pixel(ImageMath.eval("not A", images)) == 0
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assert pixel(ImageMath.eval("A and B", images)) == "L 2"
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assert pixel(ImageMath.eval("A or B", images)) == "L 1"
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def test_convert():
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assert pixel(ImageMath.eval("convert(A+B, 'L')", images)) == "L 3"
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assert pixel(ImageMath.eval("convert(A+B, '1')", images)) == "1 0"
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assert pixel(ImageMath.eval("convert(A+B, 'RGB')", images)) == "RGB (3, 3, 3)"
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def test_compare():
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assert pixel(ImageMath.eval("min(A, B)", images)) == "I 1"
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assert pixel(ImageMath.eval("max(A, B)", images)) == "I 2"
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assert pixel(ImageMath.eval("A == 1", images)) == "I 1"
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assert pixel(ImageMath.eval("A == 2", images)) == "I 0"
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def test_one_image_larger():
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assert pixel(ImageMath.eval("A+B", A=A2, B=B)) == "I 3"
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assert pixel(ImageMath.eval("A+B", A=A, B=B2)) == "I 3"
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def test_abs():
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assert pixel(ImageMath.eval("abs(A)", A=A)) == "I 1"
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assert pixel(ImageMath.eval("abs(B)", B=B)) == "I 2"
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def test_binary_mod():
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assert pixel(ImageMath.eval("A%A", A=A)) == "I 0"
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assert pixel(ImageMath.eval("B%B", B=B)) == "I 0"
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assert pixel(ImageMath.eval("A%B", A=A, B=B)) == "I 1"
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assert pixel(ImageMath.eval("B%A", A=A, B=B)) == "I 0"
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assert pixel(ImageMath.eval("Z%A", A=A, Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("Z%B", B=B, Z=Z)) == "I 0"
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def test_bitwise_invert():
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assert pixel(ImageMath.eval("~Z", Z=Z)) == "I -1"
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assert pixel(ImageMath.eval("~A", A=A)) == "I -2"
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assert pixel(ImageMath.eval("~B", B=B)) == "I -3"
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def test_bitwise_and():
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assert pixel(ImageMath.eval("Z&Z", A=A, Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("Z&A", A=A, Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("A&Z", A=A, Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("A&A", A=A, Z=Z)) == "I 1"
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def test_bitwise_or():
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assert pixel(ImageMath.eval("Z|Z", A=A, Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("Z|A", A=A, Z=Z)) == "I 1"
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assert pixel(ImageMath.eval("A|Z", A=A, Z=Z)) == "I 1"
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assert pixel(ImageMath.eval("A|A", A=A, Z=Z)) == "I 1"
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def test_bitwise_xor():
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assert pixel(ImageMath.eval("Z^Z", A=A, Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("Z^A", A=A, Z=Z)) == "I 1"
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assert pixel(ImageMath.eval("A^Z", A=A, Z=Z)) == "I 1"
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assert pixel(ImageMath.eval("A^A", A=A, Z=Z)) == "I 0"
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def test_bitwise_leftshift():
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assert pixel(ImageMath.eval("Z<<0", Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("Z<<1", Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("A<<0", A=A)) == "I 1"
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assert pixel(ImageMath.eval("A<<1", A=A)) == "I 2"
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def test_bitwise_rightshift():
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assert pixel(ImageMath.eval("Z>>0", Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("Z>>1", Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("A>>0", A=A)) == "I 1"
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assert pixel(ImageMath.eval("A>>1", A=A)) == "I 0"
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def test_logical_eq():
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assert pixel(ImageMath.eval("A==A", A=A)) == "I 1"
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assert pixel(ImageMath.eval("B==B", B=B)) == "I 1"
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assert pixel(ImageMath.eval("A==B", A=A, B=B)) == "I 0"
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assert pixel(ImageMath.eval("B==A", A=A, B=B)) == "I 0"
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def test_logical_ne():
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assert pixel(ImageMath.eval("A!=A", A=A)) == "I 0"
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assert pixel(ImageMath.eval("B!=B", B=B)) == "I 0"
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assert pixel(ImageMath.eval("A!=B", A=A, B=B)) == "I 1"
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assert pixel(ImageMath.eval("B!=A", A=A, B=B)) == "I 1"
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def test_logical_lt():
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assert pixel(ImageMath.eval("A<A", A=A)) == "I 0"
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assert pixel(ImageMath.eval("B<B", B=B)) == "I 0"
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assert pixel(ImageMath.eval("A<B", A=A, B=B)) == "I 1"
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assert pixel(ImageMath.eval("B<A", A=A, B=B)) == "I 0"
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def test_logical_le():
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assert pixel(ImageMath.eval("A<=A", A=A)) == "I 1"
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assert pixel(ImageMath.eval("B<=B", B=B)) == "I 1"
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assert pixel(ImageMath.eval("A<=B", A=A, B=B)) == "I 1"
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assert pixel(ImageMath.eval("B<=A", A=A, B=B)) == "I 0"
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def test_logical_gt():
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assert pixel(ImageMath.eval("A>A", A=A)) == "I 0"
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assert pixel(ImageMath.eval("B>B", B=B)) == "I 0"
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assert pixel(ImageMath.eval("A>B", A=A, B=B)) == "I 0"
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assert pixel(ImageMath.eval("B>A", A=A, B=B)) == "I 1"
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def test_logical_ge():
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assert pixel(ImageMath.eval("A>=A", A=A)) == "I 1"
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assert pixel(ImageMath.eval("B>=B", B=B)) == "I 1"
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assert pixel(ImageMath.eval("A>=B", A=A, B=B)) == "I 0"
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assert pixel(ImageMath.eval("B>=A", A=A, B=B)) == "I 1"
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def test_logical_equal():
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assert pixel(ImageMath.eval("equal(A, A)", A=A)) == "I 1"
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assert pixel(ImageMath.eval("equal(B, B)", B=B)) == "I 1"
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assert pixel(ImageMath.eval("equal(Z, Z)", Z=Z)) == "I 1"
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assert pixel(ImageMath.eval("equal(A, B)", A=A, B=B)) == "I 0"
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assert pixel(ImageMath.eval("equal(B, A)", A=A, B=B)) == "I 0"
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assert pixel(ImageMath.eval("equal(A, Z)", A=A, Z=Z)) == "I 0"
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def test_logical_not_equal():
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assert pixel(ImageMath.eval("notequal(A, A)", A=A)) == "I 0"
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assert pixel(ImageMath.eval("notequal(B, B)", B=B)) == "I 0"
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assert pixel(ImageMath.eval("notequal(Z, Z)", Z=Z)) == "I 0"
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assert pixel(ImageMath.eval("notequal(A, B)", A=A, B=B)) == "I 1"
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assert pixel(ImageMath.eval("notequal(B, A)", A=A, B=B)) == "I 1"
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assert pixel(ImageMath.eval("notequal(A, Z)", A=A, Z=Z)) == "I 1"
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