Fix TestTestingFarmUtil.test_fetch_failed_test_cases_from_file

`TestingFarmRequest` now can be put into test-mode which allows to fetch
failed test cases from file rather than URL.

Fixes #632

snapshot_manager/snapshot_manager/testing_farm_util.py

@@ -42,6 +42,12 @@ class TestingFarmRequest:
     )
     copr_build_ids_pattern: ClassVar[str] = r"(\d,)*\d"
 
+    _in_test_mode: bool = False
+    """When this mode is on, we can workaround certain restrictions for fetching
+    outdated URLs for example."""
+
+    _dirname: str = pathlib.Path(os.path.dirname(__file__))
+
     @property
     def are_build_ids_still_valid(self, copr_build_ids: list[int]) -> bool:
         """Returns True if the given copr builds are the same as the ones
@@ -110,14 +116,30 @@ def parse(cls, string: str) -> dict[str, "TestingFarmRequest"]:
         >>> keys = requests.keys()
         >>> keys
         dict_keys(['fedora-rawhide-x86_64', 'fedora-39-x86_64', 'fedora-40-x86_64', 'fedora-38-x86_64'])
-        >>> requests['fedora-rawhide-x86_64']
-        TestingFarmRequest(request_id=UUID('271a79e8-fc9a-4e1d-95fe-567cc9d62ad4'), chroot='fedora-rawhide-x86_64', copr_build_ids=[1, 2, 3])
-        >>> requests['fedora-39-x86_64']
-        TestingFarmRequest(request_id=UUID('22222222-fc9a-4e1d-95fe-567cc9d62ad4'), chroot='fedora-39-x86_64', copr_build_ids=[5, 6, 7])
-        >>> requests['fedora-40-x86_64']
-        TestingFarmRequest(request_id=UUID('33333333-fc9a-4e1d-95fe-567cc9d62ad4'), chroot='fedora-40-x86_64', copr_build_ids=[12, 13, 14])
-        >>> requests['fedora-38-x86_64']
-        TestingFarmRequest(request_id=UUID('44444444-fc9a-4e1d-95fe-567cc9d62ad4'), chroot='fedora-38-x86_64', copr_build_ids=[])
+        >>> requests['fedora-rawhide-x86_64'].request_id
+        UUID('271a79e8-fc9a-4e1d-95fe-567cc9d62ad4')
+        >>> requests['fedora-rawhide-x86_64'].chroot
+        'fedora-rawhide-x86_64'
+        >>> requests['fedora-rawhide-x86_64'].copr_build_ids
+        [1, 2, 3]
+        >>> requests['fedora-39-x86_64'].request_id
+        UUID('22222222-fc9a-4e1d-95fe-567cc9d62ad4')
+        >>> requests['fedora-39-x86_64'].chroot
+        'fedora-39-x86_64'
+        >>> requests['fedora-39-x86_64'].copr_build_ids
+        [5, 6, 7]
+        >>> requests['fedora-40-x86_64'].request_id
+        UUID('33333333-fc9a-4e1d-95fe-567cc9d62ad4')
+        >>> requests['fedora-40-x86_64'].chroot
+        'fedora-40-x86_64'
+        >>> requests['fedora-40-x86_64'].copr_build_ids
+        [12, 13, 14]
+        >>> requests['fedora-38-x86_64'].request_id
+        UUID('44444444-fc9a-4e1d-95fe-567cc9d62ad4')
+        >>> requests['fedora-38-x86_64'].chroot
+        'fedora-38-x86_64'
+        >>> requests['fedora-38-x86_64'].copr_build_ids
+        []
         """
         matches = re.findall(r"<!--TESTING_FARM:([^/]+)/([^/]+)(/([^/]+))?-->", string)
         if not matches:
@@ -453,7 +475,14 @@ def get_failed_test_cases_from_xunit_file(
                 './logs/log[@name="testout.log"]'
             ).get("href")
 
-            log_file = util.read_url_response_into_file(log_output_url)
+            log_file: pathlib.Path
+            if not self._in_test_mode:
+                log_file = util.read_url_response_into_file(log_output_url)
+            else:
+                p = self._dirname.joinpath(
+                    f"../tests/testing-farm-logs/output_{self.request_id}.txt"
+                )
+                log_file = pathlib.Path(p)
             tc = FailedTestCase(
                 test_name=failed_testcase.get("name"),
                 log_output_url=log_output_url,

snapshot_manager/tests/testing-farm-logs/output_1f25b0df-71f1-4a13-a4b8-c066f6f5f116.txt

@@ -0,0 +1,4 @@
++ clang -m32 -fsanitize=address test.c
+/usr/bin/ld: cannot find -lgcc_s: No such file or directory
+clang: error: linker command failed with exit code 1 (use -v to see invocation)
+Shared connection to 3.12.104.11 closed.

snapshot_manager/tests/testing_farm_util_test.py

@@ -13,6 +13,7 @@ def test_fetch_failed_test_cases_from_file(self):
             request_id=request_id,
             chroot=chroot,
             copr_build_ids=[11, 22, 33],
+            _in_test_mode=True,
         )
         actual = req.get_failed_test_cases_from_xunit_file(
             xunit_file=self.abspath(f"testing-farm-logs/results_{request_id}.xml"),