Ignore crashes that happen on the 3rd party plugins (#1228)

* Ignore crashes that happen on the 3rd party plugins

* Give a suggestion about how to uninstall

tests/conftest.py

@@ -6,6 +6,7 @@ from pytest_httpbin import certs
 
 from .utils import HTTPBIN_WITH_CHUNKED_SUPPORT_DOMAIN, HTTPBIN_WITH_CHUNKED_SUPPORT
 from .utils.plugins_cli import ( # noqa
+    broken_plugin,
     dummy_plugin,
     dummy_plugins,
     httpie_plugins,

tests/test_plugins_cli.py

@@ -93,6 +93,28 @@ def test_plugins_double_uninstall(httpie_plugins, httpie_plugins_success, dummy_
     )
 
 
+def test_broken_plugins(httpie_plugins, httpie_plugins_success, dummy_plugin, broken_plugin):
+    httpie_plugins_success("install", dummy_plugin.path, broken_plugin.path)
+
+    with pytest.warns(
+        UserWarning,
+        match=(
+            f'While loading "{broken_plugin.name}", an error'
+            ' ocurred: broken plugin'
+        )
+    ):
+        data = parse_listing(httpie_plugins_success('list'))
+        assert len(data) == 2
+
+    # We load before the uninstallation, so it will warn again.
+    with pytest.warns(UserWarning):
+        httpie_plugins_success("uninstall", broken_plugin.name)
+
+    # No warning now, since it is uninstalled.
+    data = parse_listing(httpie_plugins_success('list'))
+    assert len(data) == 1
+
+
 def test_plugins_cli_error_message_without_args():
     # No arguments
     result = httpie(no_debug=True)

tests/utils/plugins_cli.py

@@ -178,6 +178,14 @@ def dummy_plugin(interface):
     return interface.make_dummy_plugin()
 
 
+@pytest.fixture(scope='function')
+def broken_plugin(interface):
+    base_plugin = interface.make_dummy_plugin()
+    with open(base_plugin.path / (base_plugin.import_name + '.py'), 'a') as stream:
+        stream.write('raise ValueError("broken plugin")\n')
+    return base_plugin
+
+
 @pytest.fixture(scope='function')
 def dummy_plugins(interface):
     # Multiple plugins with different configurations