test_build_system_requires_not_available assert False + where False = <built-in method startswith of str object at 0x10630bad0>("Package operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/build_system_requires_not_available)\n\n SolveFailureError\n\n Because -root- depends on poetry-core (0.999) which doesn't match any versions, version solving failed.\n") + where <built-in method startswith of str object at 0x10630bad0> = 'Package operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/build_system_requires_not_available)'.startswith

test_build_backend_errors_are_reported_correctly_if_caused_by_subprocess[True-exception0-build] ImportError: cannot import name 'ExceptionTrace' from 'cleo.ui.exception_trace' (/Users/runner/Library/Caches/pypoetry/virtualenvs/poetry--2IDkNy2-py3.10/lib/python3.10/site-packages/cleo/ui/exception_trace/__init__.py)

test_build_backend_errors_are_reported_correctly_if_caused_by_subprocess_encoding[None-utf-8] AssertionError: assert ((None or 'Errör on stdout')) in '\nPackage operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/simple_project)\n' + where '\nPackage operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/simple_project)\n' = fetch_output() + where fetch_output = <cleo.io.buffered_io.BufferedIO object at 0x105c85c30>.fetch_output

test_build_backend_errors_are_reported_correctly_if_caused_by_subprocess[True-exception0-get_requires_for_build] ImportError: cannot import name 'ExceptionTrace' from 'cleo.ui.exception_trace' (/Users/runner/Library/Caches/pypoetry/virtualenvs/poetry--2IDkNy2-py3.10/lib/python3.10/site-packages/cleo/ui/exception_trace/__init__.py)

test_build_system_requires_install_failure AssertionError: assert False + where False = <built-in method startswith of str object at 0x105c4e4c0>('Package operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/simple_project)\n\n IsolatedBuildInstallError\n\n Failed to install poetry-core>=1.1.0a7.\n \n Output:\n output\n \n Error:\n error\n\n') + where <built-in method startswith of str object at 0x105c4e4c0> = 'Package operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/simple_project)'.startswith

test_executor_no_supported_hash_types AssertionError: assert 'No usable hash type(s) for demo' in '\nPackage operations: 1 install, 0 updates, 0 removals\n\n - Installing demo (0.1.0 /Users/runner/work/poetry/poetry/tests/fixtures/distributions/demo-0.1.0.tar.gz)\n'

test_execute_should_gracefully_handle_io_error AssertionError: assert None + where None = <function match at 0x10278bb50>('\nPackage operations: 1 install, 0 updates, 0 removals\n\n\n\\s*Unicode\\w+Error\n', '\nPackage operations: 1 install, 0 updates, 0 removals\n\n') + where <function match at 0x10278bb50> = re.match + and '\nPackage operations: 1 install, 0 updates, 0 removals\n\n' = fetch_output() + where fetch_output = <cleo.io.buffered_io.BufferedIO object at 0x10661c310>.fetch_output

test_build_backend_errors_are_reported_correctly_if_caused_by_subprocess[True-exception1-build] ImportError: cannot import name 'ExceptionTrace' from 'cleo.ui.exception_trace' (/Users/runner/Library/Caches/pypoetry/virtualenvs/poetry--2IDkNy2-py3.10/lib/python3.10/site-packages/cleo/ui/exception_trace/__init__.py)

test_build_backend_errors_are_reported_correctly_if_caused_by_subprocess[False-exception0-build] AssertionError: assert False + where False = <built-in method startswith of str object at 0x105b88ed0>('\nPackage operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/simple_project)\n\n IsolatedBuildError\n\n hide the original error\n \n original error\n') + where <built-in method startswith of str object at 0x105b88ed0> = '\nPackage operations: 1 install, 0 updates, 0 removals\n\n - Installing simple-project (1.2.3 /Users/runner/work/poetry/poetry/tests/fixtures/simple_project)\n'.startswith