Add integration test for emulation

test/test_emulation.py

@@ -0,0 +1,35 @@
+import pytest
+from . import utils
+from . import test_projects
+
+
+project_with_a_test = test_projects.new_c_project()
+
+project_with_a_test.files['test/spam_test.py'] = r'''
+import spam
+
+def test_spam():
+    assert spam.system('python -c "exit(0)"') == 0
+    assert spam.system('python -c "exit(1)"') != 0
+'''
+
+
+@pytest.mark.emulation
+def test(tmp_path):
+    project_dir = tmp_path / 'project'
+    project_with_a_test.generate(project_dir)
+
+    # build and test the wheels
+    actual_wheels = utils.cibuildwheel_run(project_dir, add_env={
+        'CIBW_TEST_REQUIRES': 'pytest',
+        'CIBW_TEST_COMMAND': 'pytest {project}/test',
+        'CIBW_ARCHS': 'aarch64 ppc64le s390x',
+    })
+
+    # also check that we got the right wheels
+    expected_wheels = (
+        utils.expected_wheels('spam', '0.1.0', machine_arch='aarch64')
+        + utils.expected_wheels('spam', '0.1.0', machine_arch='ppc64le')
+        + utils.expected_wheels('spam', '0.1.0', machine_arch='s390x')
+    )
+    assert set(actual_wheels) == set(expected_wheels)