Add successful test building with Py_LIMITED_API

test/test_limited_api.py

@@ -0,0 +1,19 @@
+from . import test_projects, utils
+
+basic_project = test_projects.new_c_project(
+    setup_py_setup_args_add='py_limited_api=True',
+)
+
+
+def test_setup_py(tmp_path):
+    project_dir = tmp_path / 'project'
+    basic_project.generate(project_dir)
+
+    # build the wheels
+    actual_wheels = utils.cibuildwheel_run(project_dir, add_env={
+        'CIBW_BUILD': 'cp27-* cp35-*',
+    })
+
+    # check that the expected wheels are produced
+    expected_wheels = utils.expected_wheels('spam', '0.1.0', limited_api=True)
+    assert set(actual_wheels) == set(expected_wheels)

test/utils.py

@@ -77,7 +77,8 @@ def cibuildwheel_run(project_path, package_dir='.', env=None, add_env=None, outp
 
 def expected_wheels(package_name, package_version, manylinux_versions=None,
                     macosx_deployment_target='10.9', machine_arch=None, *,
-                    exclude_27=IS_WINDOWS_RUNNING_ON_TRAVIS):
+                    exclude_27=IS_WINDOWS_RUNNING_ON_TRAVIS,
+                    limited_api=False):
     '''
     Returns a list of expected wheels from a run of cibuildwheel.
     '''
@@ -95,7 +96,10 @@ def expected_wheels(package_name, package_version, manylinux_versions=None,
         else:
             manylinux_versions = ['manylinux2014']
 
-    python_abi_tags = ['cp35-cp35m', 'cp36-cp36m', 'cp37-cp37m', 'cp38-cp38', 'cp39-cp39']
+    if limited_api:
+        python_abi_tags = ['cp35-abi3']
+    else:
+        python_abi_tags = ['cp35-cp35m', 'cp36-cp36m', 'cp37-cp37m', 'cp38-cp38', 'cp39-cp39']
 
     if machine_arch in ['x86_64', 'AMD64', 'x86']:
         python_abi_tags += ['cp27-cp27m', 'pp27-pypy_73', 'pp36-pypy36_pp73', 'pp37-pypy37_pp73']