Add test coverage for time kernels only use of ensure_spice

Add test coverage for ensure_spice failure -> SpiceyError

imap_processing/tests/conftest.py

@@ -67,8 +67,8 @@ def furnish_sclk(spice_test_data_path):
     spice.kclear()
 
 
-@pytest.fixture(scope="session")
-def use_test_metakernel(tmpdir_factory, monkeypatch_session, spice_test_data_path):
+@pytest.fixture()
+def use_test_metakernel(tmpdir_factory, monkeypatch, spice_test_data_path):
     """For the whole test session, set the SPICE_METAKERNEL environment variable
     Prime the test metakernel by creating it from the template metakernel
     (allows using absolute paths on any dev system)"""
@@ -132,6 +132,6 @@ def get_test_kernels_to_load():
     metakernel = metakernel_path.join("imap_2024_v001.tm")
     kernels_to_load = get_test_kernels_to_load()
     make_metakernel_from_kernels(metakernel, kernels_to_load)
-    monkeypatch_session.setenv("SPICE_METAKERNEL", str(metakernel))
+    monkeypatch.setenv("SPICE_METAKERNEL", str(metakernel))
     yield str(metakernel)
     spice.kclear()

imap_processing/tests/spice/test_kernels.py

@@ -2,6 +2,7 @@
 
 import pytest
 import spiceypy as spice
+from spiceypy.utils.exceptions import SpiceyError
 
 from imap_processing.spice import kernels
 
@@ -46,3 +47,17 @@ def double_wrap_et2utc_tk_only(et, fmt, prec):
 def test_ensure_spice_emus_mk_path(func, use_test_metakernel):
     """Test functionality of ensure spice with SPICE_METAKERNEL set"""
     assert func(577365941.184, "ISOC", 3) == "2018-04-18T23:24:31.998"
+
+
+def test_ensure_spice_time_kernels():
+    """Test functionality of ensure spice with timekernels set"""
+    wrapped = kernels.ensure_spice(spice.et2utc, time_kernels_only=True)
+    with pytest.raises(NotImplementedError):
+        _ = wrapped(577365941.184, "ISOC", 3) == "2018-04-18T23:24:31.998"
+
+
+def test_ensure_spice_key_error():
+    """Test functionality of ensure spice with timekernels set"""
+    wrapped = kernels.ensure_spice(spice.et2utc)
+    with pytest.raises(SpiceyError):
+        _ = wrapped(577365941.184, "ISOC", 3) == "2018-04-18T23:24:31.998"