pytest: Temporary Working Directory

Tests can generate temporary output and directories, which
might clash and/or need cleaning between tests.

This changes the current working directory to a unique
directory per test.

tests/conftest.py

@@ -20,20 +20,21 @@
 
 
 @pytest.fixture(autouse=True, scope="function")
-def amrex_init():
- amr.initialize(
- [
- # print AMReX status messages
- "amrex.verbose=2",
- # throw exceptions and create core dumps instead of
- # AMReX backtrace files: allows to attach to
- # debuggers
- "amrex.throw_exception=1",
- "amrex.signal_handling=0",
- # abort GPU runs if out-of-memory instead of swapping to host RAM
- # "abort_on_out_of_gpu_memory=1",
- ]
- )
+def amrex_init(tmpdir):
+ with tmpdir.as_cwd():
+ amr.initialize(
+ [
+ # print AMReX status messages
+ "amrex.verbose=2",
+ # throw exceptions and create core dumps instead of
+ # AMReX backtrace files: allows to attach to
+ # debuggers
+ "amrex.throw_exception=1",
+ "amrex.signal_handling=0",
+ # abort GPU runs if out-of-memory instead of swapping to host RAM
+ # "abort_on_out_of_gpu_memory=1",
+ ]
+ )
  yield
  amr.finalize()