Add test proving #1599

2 files changed, 5 insertions, 0 deletions

diff --git a/tests/blank_rsa.key b/tests/blank_rsa.key
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/tests/blank_rsa.key
diff --git a/tests/test_pkey.py b/tests/test_pkey.py
index 687e776b..6acb9121 100644
--- a/tests/test_pkey.py
+++ b/tests/test_pkey.py
@@ -184,6 +184,11 @@ class KeyTest(unittest.TestCase):
                 with pytest.raises(SSHException, match=str(exception)):
                     RSAKey.from_private_key_file(_support("test_rsa.key"))
 
+    def test_loading_empty_keys_errors_usefully(self):
+        # #1599 - raise SSHException instead of IndexError
+        with pytest.raises(SSHException, match="no lines"):
+            RSAKey.from_private_key_file(_support("blank_rsa.key"))
+
     def test_load_rsa_password(self):
         key = RSAKey.from_private_key_file(
             _support("test_rsa_password.key"), "television"