tests: add ebuild repo metadata generation tests

Author: radhermit

testdata

@@ -13,6 +13,7 @@
 pytest_plugins = ["pkgcraft._pytest"]
 
 from pkgcraft.config import Config
+from pkgcraft.error import InvalidRepo
 
 DATADIR = Path(__file__).parent.parent / "testdata"
 
@@ -34,5 +35,9 @@ def testdata_config():
     """All repo test data loaded into a Config object."""
     config = Config()
     for path in sorted(glob.glob(f"{DATADIR}/repos/*")):
-        config.add_repo(path, id=os.path.basename(path), external=False)
+        try:
+            config.add_repo(path, id=os.path.basename(path), external=False)
+        except InvalidRepo:
+            # ignore purposely broken repos
+            pass
     return config

tests/conftest.py

@@ -1,3 +1,5 @@
+import os
+import shutil
 from pathlib import Path
 
 import pytest
@@ -104,6 +106,30 @@ def test_masters(self, testdata_config):
         secondary_repo = testdata_config.repos["dependent-secondary"]
         assert secondary_repo.masters == (primary_repo,)
 
+    def test_pkg_metadata_regen(self, testdata_config, tmpdir):
+        orig_repo = testdata_config.repos["metadata-gen"]
+        # copy original repo to a temp dir
+        repo_path = shutil.copytree(orig_repo.path, tmpdir.join("repo"))
+        repo = EbuildRepo(repo_path)
+        metadata_path = repo.path.joinpath("metadata/md5-cache")
+
+        def metadata_content():
+            """Yield metadata file names and content."""
+            for root, _dirs, files in os.walk(metadata_path):
+                for name in files:
+                    with open(os.path.join(root, name)) as f:
+                        yield (name, f.read())
+
+        # record expected metadata file content
+        expected = sorted(metadata_content())
+        # wipe metadata
+        shutil.rmtree(metadata_path)
+        # regenerate metadata
+        repo.pkg_metadata_regen()
+        # verify new data matches original
+        data = sorted(metadata_content())
+        assert data == expected
+
 
 class TestEbuildRepoMetadata:
     def test_arches(self, make_ebuild_repo):