python-gitlab
diff --git a/‎tests/unit/conftest.py‎
Lines changed: 10 additions & 0 deletions b/‎tests/unit/conftest.py‎
Lines changed: 10 additions & 0 deletions
diff --git a/‎tests/unit/helpers.py‎
Lines changed: 9 additions & 0 deletions b/‎tests/unit/helpers.py‎
Lines changed: 9 additions & 0 deletions
diff --git a/‎tests/unit/test_cli.py‎
Lines changed: 23 additions & 0 deletions b/‎tests/unit/test_cli.py‎
Lines changed: 23 additions & 0 deletions
@@ -21,6 +21,16 @@ def fake_object(fake_manager):
     return helpers.FakeObject(fake_manager, {"attr1": "foo", "alist": [1, 2, 3]})
 
 
+@pytest.fixture
+def fake_object_no_id(fake_manager):
+    return helpers.FakeObjectWithoutId(fake_manager, {})
+
+
+@pytest.fixture
+def fake_object_long_repr(fake_manager):
+    return helpers.FakeObjectWithLongRepr(fake_manager, {"test": "a" * 100})
+
+
 @pytest.fixture
 def fake_object_with_parent(fake_manager_with_parent):
     return helpers.FakeObject(
 
@@ -15,6 +15,15 @@ class FakeObject(base.RESTObject):
     pass
 
 
+class FakeObjectWithoutId(base.RESTObject):
+    _id_attr = None
+
+
+class FakeObjectWithLongRepr(base.RESTObject):
+    _id_attr = None
+    _repr_attr = "test"
+
+
 class OtherFakeObject(FakeObject):
     _id_attr = "foo"
 
 
@@ -1,14 +1,17 @@
 import argparse
 import io
 import os
+import sys
 import tempfile
 from contextlib import redirect_stderr  # noqa: H302
+from unittest import mock
 
 import pytest
 
 import gitlab.base
 from gitlab import cli
 from gitlab.exceptions import GitlabError
+from gitlab.v4 import cli as v4_cli
 
 
 @pytest.mark.parametrize(
@@ -146,3 +149,23 @@ def test_v4_parser():
     )
     actions = user_subparsers.choices["create"]._option_string_actions
     assert actions["--name"].required
+
+
+@pytest.mark.skipif(sys.version_info < (3, 8), reason="added in 3.8")
+def test_legacy_display_without_fields_warns(fake_object_no_id):
+    printer = v4_cli.LegacyPrinter()
+
+    with mock.patch("builtins.print") as mocked:
+        printer.display(fake_object_no_id, obj=fake_object_no_id)
+
+    assert "No default fields to show" in mocked.call_args.args[0]
+
+
+@pytest.mark.skipif(sys.version_info < (3, 8), reason="added in 3.8")
+def test_legacy_display_with_long_repr_truncates(fake_object_long_repr):
+    printer = v4_cli.LegacyPrinter()
+
+    with mock.patch("builtins.print") as mocked:
+        printer.display(fake_object_long_repr, obj=fake_object_long_repr)
+
+    assert len(mocked.call_args.args[0]) < 80