Test: check fields in world source manifest (#5558)

* Test: check game in world manifest

* Update test/general/test_world_manifest.py

Co-authored-by: Duck <31627079+duckboycool@users.noreply.github.com>

* Test: rework finding expected manifest location

* Test: fix doc comment

* Test: fix wrong custom_worlds path in test_world_manifest

Also simplifies the way we find ./worlds/.

* Test: make test_world_manifest easier to extend

* Test: check world_version in world manifest

according to docs/apworld specification.md

* Test: check no container version in source world manifest

according what was added to docs/apworld specification.md in PR 5509

* Test: better assertion messages in test_world_manifest.py

* Test: fix wording in world source manifest

---------

Co-authored-by: Duck <31627079+duckboycool@users.noreply.github.com>

test/general/test_world_manifest.py

@@ -0,0 +1,102 @@
+"""Check world sources' manifest files"""
+
+import json
+import unittest
+from pathlib import Path
+from typing import Any, ClassVar
+
+import test
+from Utils import home_path, local_path
+from worlds.AutoWorld import AutoWorldRegister
+from ..param import classvar_matrix
+
+
+test_path = Path(test.__file__).parent
+worlds_paths = [
+    Path(local_path("worlds")),
+    Path(local_path("custom_worlds")),
+    Path(home_path("worlds")),
+    Path(home_path("custom_worlds")),
+]
+
+# Only check source folders for now. Zip validation should probably be in the loader and/or installer.
+source_world_names = [
+    k
+    for k, v in AutoWorldRegister.world_types.items()
+    if not v.zip_path and not Path(v.__file__).is_relative_to(test_path)
+]
+
+
+def get_source_world_manifest_path(game: str) -> Path | None:
+    """Get path of archipelago.json in the world's root folder from game name."""
+    # TODO: add a feature to AutoWorld that makes this less annoying
+    world_type = AutoWorldRegister.world_types[game]
+    world_type_path = Path(world_type.__file__)
+    for worlds_path in worlds_paths:
+        if world_type_path.is_relative_to(worlds_path):
+            world_root = worlds_path / world_type_path.relative_to(worlds_path).parents[0]
+            manifest_path = world_root / "archipelago.json"
+            return manifest_path if manifest_path.exists() else None
+    assert False, f"{world_type_path} not found in any worlds path"
+
+
+# TODO: remove the filter once manifests are mandatory.
+@classvar_matrix(game=filter(get_source_world_manifest_path, source_world_names))
+class TestWorldManifest(unittest.TestCase):
+    game: ClassVar[str]
+    manifest: ClassVar[dict[str, Any]]
+
+    @classmethod
+    def setUpClass(cls) -> None:
+        world_type = AutoWorldRegister.world_types[cls.game]
+        assert world_type.game == cls.game
+        manifest_path = get_source_world_manifest_path(cls.game)
+        assert manifest_path  # make mypy happy
+        with manifest_path.open("r", encoding="utf-8") as f:
+            cls.manifest = json.load(f)
+
+    def test_game(self) -> None:
+        """Test that 'game' will be correctly defined when generating APWorld manifest from source."""
+        self.assertIn(
+            "game",
+            self.manifest,
+            f"archipelago.json manifest exists for {self.game} but does not contain 'game'",
+        )
+        self.assertEqual(
+            self.manifest["game"],
+            self.game,
+            f"archipelago.json manifest for {self.game} specifies wrong game '{self.manifest['game']}'",
+        )
+
+    def test_world_version(self) -> None:
+        """Test that world_version matches the requirements in apworld specification.md""" 
+        if "world_version" in self.manifest:
+            world_version: str = self.manifest["world_version"]
+            self.assertIsInstance(
+                world_version,
+                str,
+                f"world_version in archipelago.json for '{self.game}' has to be string if provided.",
+            )
+            parts = world_version.split(".")
+            self.assertEqual(
+                len(parts),
+                3,
+                f"world_version in archipelago.json for '{self.game}' has to be in the form of 'major.minor.build'.",
+            )
+            for part in parts:
+                self.assertTrue(
+                    part.isdigit(),
+                    f"world_version in archipelago.json for '{self.game}' may only contain numbers.",
+                )
+
+    def test_no_container_version(self) -> None:
+        self.assertNotIn(
+            "version",
+            self.manifest,
+            f"archipelago.json for '{self.game}' must not define 'version', see apworld specification.md.",
+        )
+        self.assertNotIn(
+            "compatible_version",
+            self.manifest,
+            f"archipelago.json for '{self.game}' must not define 'compatible_version', see apworld specification.md.",
+        )