WS-308: demonstrate that we can get an ALMA BDF out of ALMA's NGAS cluster

apps/cli/executables/datafetcher/tests/test_alma_fetch.py

+""" Proof of concept: stream an ALMA BDF out of ALMA's NGAS cluster """
+
+import logging
+
+import pytest
+from datafetcher.locations_report import NgasFileSchema, NgasFile, NgasTarget
+from datafetcher.retrieve_launcher import ParallelRetrieverLauncher
+
+logger = logging.getLogger(__name__)
+
+
+@pytest.mark.skip("for demonstration only")
+def test_fake_alma_fetch():
+    """
+    Create a fake locations report "files" instance containing the information
+    needed to fetch it. Filename is sanitized ngas_file_id with the .bdf file extension.
+    The sanitized ngas_id can be obtained from archive.files like this:
+
+    SELECT ngas_id, filename FROM files WHERE ngas_id LIKE '%A002%Xd0adbe%X10f.bdf';
+
+    :return:
+    """
+
+    fake_loc_rpt = {
+        "ngas_file_id": "A002/Xd0adbe/X10f",
+        "subdirectory": "afa/2018-08-13/1/A002:Xd0adbe:X10f.09970384d205b6de5558146b388ba7dd___X10",
+        "relative_path": "afa/2018-08-13/1/uid___A002_Xd0adbe_X10f.bdf",
+        "checksum": "1632201880",
+        "checksum_type": "ngamsGenCrc32",
+        "version": 1,
+        "size": 1536802,
+        "server": {
+            "server": "nangas06.cv.nrao.edu:7771",
+            "location": "NAASC",
+            "cluster": "NAASC",
+        },
+    }
+
+    schema = NgasFileSchema()
+    ngas_file = schema.load(fake_loc_rpt)
+    assert isinstance(ngas_file, NgasFile)
+
+    target = NgasTarget(ngas_file, "DSOC")
+    launcher = ParallelRetrieverLauncher([target], False, False)
+    retrieved_count = launcher.launch_retrievers()
+    assert retrieved_count == 1