993 progress: convert 2 more test files to pytest; 5 remain (stac-utils#1533)

* 993 start conversion of test_raster.py

* 993 nonfunctional de-class of test_raster.py

* 993 de-class test_raster.py's cassettes

* 993 start refactor & prove w/couple tests

* 993 convert assertions to pytest in test_raster.py

* 993 finish conversion of test_raster.py

* 993 pre-commit faff

* 993 convert assertions in test_sar.py

* 993 convert the cassette-using tests in test_sar.py

* 993 provide a sentinel fixture & prove it works

* 993 convert remaining SarItemExtTest tests

* 993 prep for converting SarSummariesTest

* 993 non-functional declassing

* 993 convert summaries tests in test_sar.py

* 993 pre-commit to finish test_sar.py

Author: teks

tests/conftest.py

@@ -13,7 +13,7 @@
 
 from .utils import ARBITRARY_BBOX, ARBITRARY_EXTENT, ARBITRARY_GEOM, TestCases
 
-here = Path(__file__).resolve().parent
+HERE = Path(__file__).resolve().parent
 
 
 @pytest.fixture
@@ -60,7 +60,7 @@ def projection_landsat8_item() -> Item:
 
 
 def get_data_file(rel_path: str) -> str:
-    return str(here / "data-files" / rel_path)
+    return str(HERE / "data-files" / rel_path)
 
 
 @pytest.fixture