def test_install_prefix_collision_fails(config, mock_fetch, mock_packages, tmpdir):
"""
Test that different specs with coinciding install prefixes will fail
to install.
"""
projections = {'all': 'all-specs-project-to-this-prefix'}
store = spack.store.Store(str(tmpdir), projections=projections)
with spack.store.use_store(store):
with spack.config.override('config:checksum', False):
pkg_a = Spec('[email protected]').concretized().package
pkg_b = Spec('[email protected]').concretized().package
pkg_a.do_install()
with pytest.raises(InstallError, match="Install prefix collision"):
pkg_b.do_install()
