Added test for Python 2 running long enough to exit nicely

Author: inclement

tests/test_entrypoints_python2.py

@@ -0,0 +1,37 @@
+
+# This test is a special case that we expect to run under Python 2, so
+# include the necessary compatibility imports:
+try:  # Python 3
+    from unittest import mock
+except ImportError:  # Python 2
+    import mock
+
+from pythonforandroid.recommendations import PY2_ERROR_TEXT
+from pythonforandroid import entrypoints
+
+
+def test_main_python2():
+    """Test that running under Python 2 leads to the build failing, while
+    running under a suitable version works fine.
+
+    Note that this test must be run *using* Python 2 to truly test
+    that p4a can reach the Python version check before importing some
+    Python-3-only syntax and crashing.
+    """
+
+    # Under Python 2, we should get a normal control flow exception
+    # that is handled properly, not any other type of crash
+    with mock.patch('sys.version_info') as fake_version_info, \
+         mock.patch('pythonforandroid.entrypoints.handle_build_exception') as handle_build_exception:
+
+        fake_version_info.major = 2
+        fake_version_info.minor = 7
+
+        def check_python2_exception(exc):
+            """Check that the exception message is Python 2 specific."""
+            assert exc.message == PY2_ERROR_TEXT
+        handle_build_exception.side_effect = check_python2_exception
+
+        entrypoints.main()
+
+    handle_build_exception.assert_called_once()