tests: Make sure tests can execute from root source dir

"python -m unittest" now works in the root source dir too

Signed-off-by: Jussi Kukkonen <jkukkonen@google.com>

tests/generated_data/generate_md.py

@@ -56,9 +56,6 @@
     signers.append(CryptoSigner(private_key, key))
 
 EXPIRY = datetime(2050, 1, 1, tzinfo=timezone.utc)
-OUT_DIR = "generated_data/ed25519_metadata"
-if not os.path.exists(OUT_DIR):
-    os.mkdir(OUT_DIR)
 
 SERIALIZER = JSONSerializer()
 
@@ -103,7 +100,12 @@ def generate_all_files(
     for i, md in enumerate([md_root, md_timestamp, md_snapshot, md_targets]):
         assert isinstance(md, Metadata)
         md.sign(signers[i])
-        path = os.path.join(OUT_DIR, f"{md.signed.type}_with_ed25519.json")
+        path = os.path.join(
+            utils.TESTS_DIR,
+            "generated_data",
+            "ed25519_metadata",
+            f"{md.signed.type}_with_ed25519.json",
+        )
         if verify:
             verify_generation(md, path)
 

tests/test_utils.py

@@ -19,6 +19,7 @@
 """
 
 import logging
+import os
 import socket
 import sys
 import unittest
@@ -56,7 +57,7 @@ def test_simple_server_startup(self) -> None:
     def test_cleanup(self) -> None:
         # Test normal case
         server_process_handler = utils.TestServerProcess(
-            log=logger, server="simple_server.py"
+            log=logger, server=os.path.join(utils.TESTS_DIR, "simple_server.py")
         )
 
         server_process_handler.clean()