test/installer.py: remove commented code and inaccurate docstring (#29305)

lib/spack/spack/test/installer.py

@@ -231,32 +231,12 @@ def _spec(spec, preferred_mirrors=None):
 
 def test_try_install_from_binary_cache(install_mockery, mock_packages,
                                        monkeypatch):
-    """Tests SystemExit path for_try_install_from_binary_cache.
-
-       This test does not make sense.  We tell spack there is a mirror
-       with a binary for this spec and then expect it to die because there
-       are no mirrors configured."""
-    # def _mirrors_for_spec(spec, full_hash_match=False):
-    #     spec = spack.spec.Spec('mpi').concretized()
-    #     return [{
-    #         'mirror_url': 'notused',
-    #         'spec': spec,
-    #     }]
-
+    """Test return false when no match exists in the mirror"""
     spec = spack.spec.Spec('mpich')
     spec.concretize()
-
-    # monkeypatch.setattr(
-    #     spack.binary_distribution, 'get_mirrors_for_spec', _mirrors_for_spec)
-
-    # with pytest.raises(SystemExit):
-    #     inst._try_install_from_binary_cache(spec.package, False, False)
     result = inst._try_install_from_binary_cache(spec.package, False, False)
     assert(not result)
 
-    # captured = capsys.readouterr()
-    # assert 'add a spack mirror to allow download' in str(captured)
-
 
 def test_installer_repr(install_mockery):
     const_arg = installer_args(['trivial-install-test-package'], {})