prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  [FR] Add integration tests to catch breaking changes in the API
  ### What's the problem this feature will solve?
  
  It would be nice to have integration tests focusing on the usage of setuptools "public API" by some popular packages in the community.
  
  This way we can catch breaking changes in the API before publishing new releases
  
  ### Describe the solution you'd like
  
  According to the discussion in https://github.com/pypa/setuptools/pull/2844, if adding a new "integration test suite", the following characteristics are desirable:
  
  1. It should run separated from the main test suite (integration tests are resource intensive and time consuming, so the best is to avoid always running them and postponing until a new release is ready).
  2. It should test how setuptools' API is being used by popular packages in the community to catch rare errors.
  
  ### Alternative Solutions
  
  _No response_
  
  ### Additional context
  
  _No response_
  
  ### Code of Conduct
  
  - [X] I agree to follow the PSF Code of Conduct
  
  </issue>
  <code>
  [start of conftest.py]
  1 import sys
  2 
  3 
  4 pytest_plugins = 'setuptools.tests.fixtures'
  5 
  6 
  7 def pytest_addoption(parser):
  8     parser.addoption(
  9         "--package_name", action="append", default=[],
  10         help="list of package_name to pass to test functions",
  11     )
  12 
  13 
  14 collect_ignore = [
  15     'tests/manual_test.py',
  16     'setuptools/tests/mod_with_constant.py',
  17     'setuptools/_distutils',
  18     '_distutils_hack',
  19     'setuptools/extern',
  20     'pkg_resources/extern',
  21     'pkg_resources/tests/data',
  22     'setuptools/_vendor',
  23     'pkg_resources/_vendor',
  24 ]
  25 
  26 
  27 if sys.version_info < (3, 6):
  28     collect_ignore.append('docs/conf.py')  # uses f-strings
  29     collect_ignore.append('pavement.py')
  30
  [end of conftest.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/conftest.py b/conftest.py
  --- a/conftest.py
  +++ b/conftest.py
  @@ -1,5 +1,7 @@
   import sys
   
  +import pytest
  +
   
   pytest_plugins = 'setuptools.tests.fixtures'
   
  @@ -9,6 +11,14 @@
           "--package_name", action="append", default=[],
           help="list of package_name to pass to test functions",
       )
  +    parser.addoption(
  +        "--integration", action="store_true", default=False,
  +        help="run integration tests (only)"
  +    )
  +
  +
  +def pytest_configure(config):
  +    config.addinivalue_line("markers", "integration: integration tests")
   
   
   collect_ignore = [
  @@ -27,3 +37,13 @@
   if sys.version_info < (3, 6):
       collect_ignore.append('docs/conf.py')  # uses f-strings
       collect_ignore.append('pavement.py')
  +
  +
  +@pytest.fixture(autouse=True)
  +def _skip_integration(request):
  +    running_integration_tests = request.config.getoption("--integration")
  +    is_integration_test = request.node.get_closest_marker("integration")
  +    if running_integration_tests and not is_integration_test:
  +        pytest.skip("running integration tests only")
  +    if not running_integration_tests and is_integration_test:
  +        pytest.skip("skipping integration tests")
  
verification_info: {"golden_diff": "diff --git a/conftest.py b/conftest.py\n--- a/conftest.py\n+++ b/conftest.py\n@@ -1,5 +1,7 @@\n import sys\n \n+import pytest\n+\n \n pytest_plugins = 'setuptools.tests.fixtures'\n \n@@ -9,6 +11,14 @@\n         \"--package_name\", action=\"append\", default=[],\n         help=\"list of package_name to pass to test functions\",\n     )\n+    parser.addoption(\n+        \"--integration\", action=\"store_true\", default=False,\n+        help=\"run integration tests (only)\"\n+    )\n+\n+\n+def pytest_configure(config):\n+    config.addinivalue_line(\"markers\", \"integration: integration tests\")\n \n \n collect_ignore = [\n@@ -27,3 +37,13 @@\n if sys.version_info < (3, 6):\n     collect_ignore.append('docs/conf.py')  # uses f-strings\n     collect_ignore.append('pavement.py')\n+\n+\n+@pytest.fixture(autouse=True)\n+def _skip_integration(request):\n+    running_integration_tests = request.config.getoption(\"--integration\")\n+    is_integration_test = request.node.get_closest_marker(\"integration\")\n+    if running_integration_tests and not is_integration_test:\n+        pytest.skip(\"running integration tests only\")\n+    if not running_integration_tests and is_integration_test:\n+        pytest.skip(\"skipping integration tests\")\n", "issue": "[FR] Add integration tests to catch breaking changes in the API\n### What's the problem this feature will solve?\n\nIt would be nice to have integration tests focusing on the usage of setuptools \"public API\" by some popular packages in the community.\r\n\r\nThis way we can catch breaking changes in the API before publishing new releases\n\n### Describe the solution you'd like\n\nAccording to the discussion in https://github.com/pypa/setuptools/pull/2844, if adding a new \"integration test suite\", the following characteristics are desirable:\r\n\r\n1. It should run separated from the main test suite (integration tests are resource intensive and time consuming, so the best is to avoid always running them and postponing until a new release is ready).\r\n2. It should test how setuptools' API is being used by popular packages in the community to catch rare errors.\n\n### Alternative Solutions\n\n_No response_\n\n### Additional context\n\n_No response_\n\n### Code of Conduct\n\n- [X] I agree to follow the PSF Code of Conduct\n", "before_files": [{"content": "import sys\n\n\npytest_plugins = 'setuptools.tests.fixtures'\n\n\ndef pytest_addoption(parser):\n    parser.addoption(\n        \"--package_name\", action=\"append\", default=[],\n        help=\"list of package_name to pass to test functions\",\n    )\n\n\ncollect_ignore = [\n    'tests/manual_test.py',\n    'setuptools/tests/mod_with_constant.py',\n    'setuptools/_distutils',\n    '_distutils_hack',\n    'setuptools/extern',\n    'pkg_resources/extern',\n    'pkg_resources/tests/data',\n    'setuptools/_vendor',\n    'pkg_resources/_vendor',\n]\n\n\nif sys.version_info < (3, 6):\n    collect_ignore.append('docs/conf.py')  # uses f-strings\n    collect_ignore.append('pavement.py')\n", "path": "conftest.py"}]}