Decouple parser definition from argparse (#1293)

tests/test_httpie_cli.py

@@ -3,6 +3,7 @@ import shutil
 import json
 from httpie.sessions import SESSIONS_DIR_NAME
 from httpie.status import ExitStatus
+from httpie.cli.options import PARSER_SPEC_VERSION
 from tests.utils import DUMMY_HOST, httpie
 from tests.fixtures import SESSION_FILES_PATH, SESSION_FILES_NEW, SESSION_FILES_OLD, read_session_file
 
@@ -123,3 +124,15 @@ def test_httpie_sessions_upgrade_all(tmp_path, mock_env, extra_args, extra_varia
         assert read_session_file(refactored_session_file) == read_session_file(
             expected_session_file, extra_variables=extra_variables
         )
+
+
+@pytest.mark.parametrize(
+    'load_func, extra_options', [
+        (json.loads, []),
+        (json.loads, ['--format=json'])
+    ]
+)
+def test_cli_export(load_func, extra_options):
+    response = httpie('cli', 'export-args', *extra_options)
+    assert response.exit_status == ExitStatus.SUCCESS
+    assert load_func(response)['version'] == PARSER_SPEC_VERSION

tests/test_parser_schema.py

@@ -0,0 +1,60 @@
+from httpie.cli.options import ParserSpec, Qualifiers
+
+
+def test_parser_serialization():
+    small_parser = ParserSpec("test_parser")
+
+    group_1 = small_parser.add_group("group_1")
+    group_1.add_argument("regular_arg", help="regular arg")
+    group_1.add_argument(
+        "variadic_arg",
+        metavar="META",
+        help=Qualifiers.SUPPRESS,
+        nargs=Qualifiers.ZERO_OR_MORE,
+    )
+    group_1.add_argument(
+        "-O",
+        "--opt-arg",
+        action="lazy_choices",
+        getter=lambda: ["opt_1", "opt_2"],
+        help_formatter=lambda state: ", ".join(state),
+    )
+
+    group_2 = small_parser.add_group("group_2")
+    group_2.add_argument("--typed", action="store_true", type=int)
+
+    definition = small_parser.finalize()
+    assert definition.serialize() == {
+        "name": "test_parser",
+        "description": None,
+        "groups": [
+            {
+                "name": "group_1",
+                "description": None,
+                "is_mutually_exclusive": False,
+                "args": [
+                    {
+                        "options": ["regular_arg"],
+                        "description": "regular arg",
+                    },
+                    {
+                        "options": ["variadic_arg"],
+                        "is_optional": True,
+                        "is_variadic": True,
+                        "metavar": "META",
+                    },
+                    {
+                        "options": ["-O", "--opt-arg"],
+                        "description": "opt_1, opt_2",
+                        "choices": ["opt_1", "opt_2"],
+                    },
+                ],
+            },
+            {
+                "name": "group_2",
+                "description": None,
+                "is_mutually_exclusive": False,
+                "args": [{"options": ["--typed"], "python_type_name": "int"}],
+            },
+        ],
+    }