Add tests for sdist zip.

Author: amjith

metadata_please/tests/sdist.py

@@ -93,6 +93,24 @@ def test_basic_metadata_absl_py_09(self) -> None:
         )
         self.assertEqual({"test"}, bm.provides_extra)
 
+    def test_basic_metadata_fields(self) -> None:
+        z = MemoryZipFile(
+            {
+                "foo/__init__.py": b"",
+                "foo.egg-info/PKG-INFO": b"Requires-Dist: foo\nVersion: 1.2.58\nSummary: Some Summary\nHome-page: http://example.com\nAuthor: Chicken\nAuthor-email: [email protected]\nKeywords: farm,animals\nRequires-Python: >=3.6\nDescription-Content-Type: text/markdown",
+            }
+        )
+        bm = basic_metadata_from_zip_sdist(z)  # type: ignore
+        self.assertEqual(["foo"], bm.reqs)
+        self.assertEqual("1.2.58", bm.version)
+        self.assertEqual("Some Summary", bm.summary)
+        self.assertEqual("http://example.com", bm.url)
+        self.assertEqual("Chicken", bm.author)
+        self.assertEqual("[email protected]", bm.author_email)
+        self.assertEqual("farm,animals", bm.keywords)
+        self.assertEqual("text/markdown", bm.long_description_content_type)
+        self.assertEqual(None, bm.description)
+
 
 class TarSdistTest(unittest.TestCase):
     def test_requires_as_expected(self) -> None: