Skip tests that require access to the token

Raise an exception when the Github token is not available and use it in
order to skip tests that require access to this token.
This will allow to run a smaller set of tests from other forks and, most
importantly, won't block their merge.

snapshot_manager/snapshot_manager/github_util.py

@@ -37,6 +37,8 @@ class Reaction(enum.StrEnum):
     ROCKET = "ROCKET"  # Represents the :rocket: emoji.
     EYES = "EYES"  # Represents the :eyes: emoji.
 
+class MissingToken(Exception):
+    """Could not retrieve a Github token."""
 
 class GithubClient:
     dirname = pathlib.Path(os.path.dirname(__file__))
@@ -52,6 +54,8 @@ def __init__(self, config: config.Config, github_token: str = None, **kwargs):
                 f"Reading Github token from this environment variable: {self.config.github_token_env}"
             )
             github_token = os.getenv(self.config.github_token_env)
+        if github_token is None or len(github_token) == 0:
+            raise MissingToken("Could not retrieve the token")
         auth = github.Auth.Token(github_token)
         self.github = github.Github(auth=auth)
         self.gql = github_graphql.GithubGraphQL(token=github_token, raise_on_error=True)

snapshot_manager/tests/github_util_test.py

@@ -48,7 +48,13 @@ def test_get_todays_issue(self):
         cfg = self.config
         cfg.datetime = datetime.datetime(year=2024, month=2, day=27)
         self.assertEqual("20240227", cfg.yyyymmdd)
-        gh = github_util.GithubClient(config=cfg)
+
+        try:
+            gh = github_util.GithubClient(config=cfg)
+        except MissingToken:
+            pytest.skip(
+                "Skip test because this execution doesn't have access to a Github token"
+            )
 
         issue = gh.get_todays_github_issue(
             strategy="big-merge", github_repo="fedora-llvm-team/llvm-snapshots"
@@ -104,7 +110,13 @@ def test_flip_test_label(self):
         pass
 
     def test_get_workflow(self):
-        gh = github_util.GithubClient(config=self.config)
+        try:
+            gh = github_util.GithubClient(config=self.config)
+        except MissingToken:
+            pytest.skip(
+                "Skip test because this execution doesn't have access to a Github token"
+            )
+
         repo = gh.github.get_repo("fedora-llvm-team/llvm-snapshots")
         workflow = repo.get_workflow("check-snapshots.yml")
         self.assertIsNotNone(workflow)

snapshot_manager/tests/testing_farm_util_test.py

@@ -13,7 +13,13 @@ def test_make_with_missing_compose(self):
         cfg = self.config
         cfg.datetime = datetime.datetime(year=2024, month=2, day=27)
         self.assertEqual("20240227", cfg.yyyymmdd)
-        gh = github_util.GithubClient(config=cfg)
+
+        try:
+            gh = github_util.GithubClient(config=cfg)
+        except MissingToken:
+            pytest.skip(
+                "Skip test because this execution doesn't have access to a Github token"
+            )
 
         issue = gh.get_todays_github_issue(
             strategy="big-merge", github_repo="fedora-llvm-team/llvm-snapshots"