Use a quicker example for the channel-inversion test

tests/test-channel-inversion/environment.yaml

@@ -4,9 +4,8 @@ channels:
   # In this case we have the channel order as recommended by rapids ai for
   # installing cudf, but we want to force getting cuda-python from conda-forge
   # instead of from the nvidia channel which would normally have higher priority
-  - rapidsai
-  - nvidia
   - conda-forge
+  - defaults
 dependencies:
-  - cudf
-  - conda-forge::cuda-python
+  - zlib
+  - defaults::libgomp

tests/test_conda_lock.py

@@ -1665,22 +1665,30 @@ def test_poetry_version_parsing_constraints(
 def test_run_with_channel_inversion(
     monkeypatch: "pytest.MonkeyPatch", channel_inversion: Path, mamba_exe: str
 ):
-    """Given that the cuda_python package is available from a few channels
-    and three of those channels listed
-    and with conda-forge listed as the lowest priority channel
-    and with the cuda_python dependency listed as "conda-forge::cuda_python",
-    ensure that the lock file parse picks up conda-forge as the channel and not one of the higher priority channels
+    """Given that the libgomp package is available from a few channels
+    and two of those channels listed
+    and with defaults listed as the lowest priority channel
+    and with the libgomp dependency listed as "defaults::libgomp",
+    ensure that the lock file parse picks up "defaults" as the channel and not
+    the higher priority conda-forge channel.
     """
     monkeypatch.chdir(channel_inversion.parent)
     run_lock([channel_inversion], conda_exe=mamba_exe, platforms=["linux-64"])
     lockfile = parse_conda_lock_file(channel_inversion.parent / DEFAULT_LOCKFILE_NAME)
     for package in lockfile.package:
-        if package.name == "cuda-python":
+        if package.name == "zlib":
             ms = MatchSpec(package.url)  # pyright: ignore
             assert ms.get("channel") == "conda-forge"
             break
     else:
-        raise ValueError("cuda-python not found!")
+        raise ValueError("zlib not found!")
+    for package in lockfile.package:
+        if package.name == "libgomp":
+            ms = MatchSpec(package.url)  # pyright: ignore
+            assert ms.get("channel") == "defaults"
+            break
+    else:
+        raise ValueError("libgomp not found!")
 
 
 def _make_spec(name: str, constraint: str = "*"):