test_blender_property_default_retrieval_230526_092431.py

# test blender property default retrieval

def ensure_site_packages(packages: list, directory: str):
    """ 
    `packages`: list of tuples (<import name>, <pip name>)
    `directory`: a folder for site packages, will be created if does not exist and added to `sys.path`
    """

    if not packages:
        return

    import bpy
    import os
    import sys
    import importlib
    import importlib.util

    os.makedirs(directory, exist_ok = True)

    if not directory in sys.path:
        sys.path.append(directory)

    modules_to_install = [module[1] for module in packages if not importlib.util.find_spec(module[0])]
    if not modules_to_install:
        return
    
    if modules_to_install:
        result = input(f'Install {modules_to_install} to: {directory}? Y/N:')
        if not result.lower() == 'y':
            quit()

    if bpy.app.version < (2,91,0):
        python_binary = bpy.app.binary_path_python
    else:
        python_binary = sys.executable

    import subprocess
    subprocess.run([python_binary, '-m', 'ensurepip'], check=True)
    subprocess.run([python_binary, '-m', 'pip', 'install', *modules_to_install, "--target", directory], check=True)

    importlib.invalidate_caches()

def is_in_blender():
    try:
        import bpy
        return bool(bpy.app.version) and bool(bpy.app.binary_path)
    except:
        return False

def test_cycles_samples_default():

    print()

    import bpy
    print(bpy.data.scenes["Scene"].cycles.samples)
    assert bpy.data.scenes["Scene"].cycles.samples
    assert bpy.data.scenes["Scene"].cycles.bl_rna.properties['samples'].default == bpy.data.scenes["Scene"].cycles.samples
    print(bpy.data.scenes["Scene"].cycles.preview_samples)
    assert bpy.data.scenes["Scene"].cycles.preview_samples
    assert bpy.data.scenes["Scene"].cycles.bl_rna.properties['preview_samples'].default == bpy.data.scenes["Scene"].cycles.preview_samples

def test_socket():

    import bpy
    import math

    print()

    material = bpy.data.materials['Material']

    if not material.use_nodes: #2.79-
        material.use_nodes = True
        material.node_tree.nodes.new('ShaderNodeBsdfPrincipled')

    default_value = material.node_tree.nodes['Principled BSDF'].inputs['IOR'].default_value
    print(default_value)
    assert math.isclose(default_value, 1.45, abs_tol=1e-6)

    default = material.node_tree.nodes['Principled BSDF'].inputs['IOR'].bl_rna.properties['default_value'].default

    print(default)
    assert default == 0.0
    assert not math.isclose(default, 1.45, abs_tol=1e-6)

if __name__ == "__main__" and is_in_blender():

    import site
    ensure_site_packages([("pytest", "pytest")], directory = site.getusersitepackages())

    import pytest

    raise SystemExit(pytest.main([
        '-svv',
        __file__
        ]))


blenders = [
    r'blender',
    r'C:\blender\blender-3.1.2-windows-x64\blender.exe',
    r'C:\blender\blender-3.6.0-alpha+main.e078419c9c12-windows.amd64-release\blender.exe',
    r'C:\Program Files (x86)\Steam\steamapps\common\Blender\blender.exe',
    r'D:\games\SteamLibrary\steamapps\common\blender_293\blender.exe',
    r'D:\games\SteamLibrary\steamapps\common\blender-2.83.13-windows64\blender.exe',
    r'D:\source\software\blender\blender-2.82-windows64\blender.exe',
    r'D:\games\SteamLibrary\steamapps\common\blender-2.79.0-git.e045fe53f1b0-windows64\blender.exe',
]

if __name__ == '__main__' and not is_in_blender():
    import subprocess
    import os

    for blender in blenders:
        print('\n')
        print('#' * os.get_terminal_size()[0])
        # print(subprocess.check_output([blender, '--version']).splitlines()[0].decode())
        subprocess.run([blender, '--python-exit-code', '1', '-b', '-noaudio',  '--factory-startup', '--python', __file__])
        
    if os.name == 'nt':
        os.system('pause')
    else:
        input('Press Enter to exit...')