Extensible canonical internal processing refactoring

tests/test_cli_extension_specs.py

@@ -0,0 +1,37 @@
+from markitect_tool.cli.extensions import collect_cli_command_specs, command_specs_from_extension
+from markitect_tool.extension import ExtensionDescriptor, builtin_extension_registry
+
+
+def test_command_specs_from_extension_handles_string_and_list_forms():
+    one = ExtensionDescriptor(id="one", kind="test", cli={"commands": "mkt one"})
+    many = ExtensionDescriptor(id="many", kind="test", cli={"commands": ["mkt a", "mkt b"]})
+
+    assert [spec.command for spec in command_specs_from_extension(one)] == ["mkt one"]
+    assert [spec.command for spec in command_specs_from_extension(many)] == ["mkt a", "mkt b"]
+
+
+def test_collect_cli_command_specs_from_builtin_registry():
+    specs = collect_cli_command_specs(builtin_extension_registry())
+    commands = {(spec.extension_id, spec.command) for spec in specs}
+
+    assert ("selector", "mkt query") in commands
+    assert ("processor.uppercase", "mkt process") in commands
+    assert ("backend.local-sqlite", "mkt cache index") in commands
+    assert ("backend.local-sqlite", "mkt search") in commands
+
+
+def test_cli_command_spec_serializes_without_empty_fields():
+    spec = command_specs_from_extension(
+        ExtensionDescriptor(
+            id="query.selector",
+            kind="query-engine",
+            summary="Selector engine",
+            cli={"commands": ["mkt query"], "group": "query"},
+        )
+    )[0]
+
+    data = spec.to_dict()
+
+    assert data["command"] == "mkt query"
+    assert data["extension_id"] == "query.selector"
+    assert data["metadata"]["group"] == "query"