Pillow/Tests/test_format_lab.py

from __future__ import annotations

from PIL import Image


def test_white():
    with Image.open("Tests/images/lab.tif") as i:
        i.load()

        assert i.mode == "LAB"

        assert i.getbands() == ("L", "A", "B")

        k = i.getpixel((0, 0))

        L = i.getdata(0)
        a = i.getdata(1)
        b = i.getdata(2)

    assert k == (255, 128, 128)

    assert list(L) == [255] * 100
    assert list(a) == [128] * 100
    assert list(b) == [128] * 100


def test_green():
    # l= 50 (/100), a = -100 (-128 .. 128) b=0 in PS
    # == RGB: 0, 152, 117
    with Image.open("Tests/images/lab-green.tif") as i:
        k = i.getpixel((0, 0))
    assert k == (128, 28, 128)


def test_red():
    # l= 50 (/100), a = 100 (-128 .. 128) b=0 in PS
    # == RGB: 255, 0, 124
    with Image.open("Tests/images/lab-red.tif") as i:
        k = i.getpixel((0, 0))
    assert k == (128, 228, 128)
Add 'from __future__ import annotations' using Ruff/isort 2023-12-21 14:13:31 +03:00			`from __future__ import annotations`
isort Tests 2024-01-20 14:23:03 +03:00
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00			`from PIL import Image`

Introduce isort to automate import ordering and formatting Similar to the recent adoption of Black. isort is a Python utility to sort imports alphabetically and automatically separate into sections. By using isort, contributors can quickly and automatically conform to the projects style without thinking. Just let the tool do it. Uses the configuration recommended by the Black to avoid conflicts of style. Rewrite TestImageQt.test_deprecated to no rely on import order. 2019-07-06 23:40:53 +03:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`def test_white():`
			`with Image.open("Tests/images/lab.tif") as i:`
			`i.load()`
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`assert i.mode == "LAB"`
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`assert i.getbands() == ("L", "A", "B")`
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`k = i.getpixel((0, 0))`
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`L = i.getdata(0)`
			`a = i.getdata(1)`
			`b = i.getdata(2)`
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`assert k == (255, 128, 128)`
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`assert list(L) == [255] * 100`
			`assert list(a) == [128] * 100`
			`assert list(b) == [128] * 100`
Shifting the midpoint of the ab channels to 128. unshifting back to signed int on pack 2013-10-16 09:01:30 +04:00

Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00			`def test_green():`
			`# l= 50 (/100), a = -100 (-128 .. 128) b=0 in PS`
			`# == RGB: 0, 152, 117`
			`with Image.open("Tests/images/lab-green.tif") as i:`
			`k = i.getpixel((0, 0))`
			`assert k == (128, 28, 128)`
Convert old tests to use unittest 2014-06-10 13:10:47 +04:00
Convert some tests to pytest style To better follow conventional pytest style, this removes the outer wrapper class in favor of a function for some tests. These tests were picked as they are relatively simple and presented no barriers to a quick port. The assert* methods are replaced with assert statements. When necessary, a fixture is used to create a temporary directory. This commit does not convert the entire test suite to this style as some test classes use methods or other advanced features that are difficult to automatically convert. The goal is to address these issues in followup commits. Refs #4193 2019-11-04 01:18:55 +03:00
			`def test_red():`
			`# l= 50 (/100), a = 100 (-128 .. 128) b=0 in PS`
			`# == RGB: 255, 0, 124`
			`with Image.open("Tests/images/lab-red.tif") as i:`
			`k = i.getpixel((0, 0))`
			`assert k == (128, 228, 128)`