JP-3787: Add regtest for IFU moving target with background spectrum

jwst/regtest/test_nirspec_ifu_spec3_moving_target.py

@@ -0,0 +1,44 @@
+from astropy.io.fits.diff import FITSDiff
+import pytest
+
+from jwst.stpipe import Step
+
+
+@pytest.fixture(scope="module")
+def run_pipeline(rtdata_module):
+    """
+    Run the calwebb_spec3 pipeline on a NIRSpec IFU moving target.
+    """
+    rtdata = rtdata_module
+
+    # Get the ASN file and input exposures
+    # Note: ASN contains a background spectrum
+    rtdata.get_asn('nirspec/ifu/jw01252-o001_spec3_00003_asn_with_bg.json')
+
+    # Run the calwebb_spec3 pipeline; save results from intermediate steps
+    args = ["calwebb_spec3", rtdata.input]
+    Step.from_cmdline(args)
+
+
+@pytest.mark.bigdata
+@pytest.mark.parametrize("suffix", ["cal", "o001_crf", "s3d", "x1d"])
+def test_nirspec_ifu_spec3_moving_target(
+        run_pipeline, rtdata_module, fitsdiff_default_kwargs, suffix):
+    """Test spec3 pipeline on a NIRSpec IFU moving target."""
+    rtdata = rtdata_module
+
+    if suffix in {"cal", "o001_crf"}:
+        output = f"jw01252001001_03101_00001_nrs1_{suffix}.fits"
+    else:
+        output = f"jw01252-o001_t004_nirspec_prism-clear_{suffix}.fits"
+    rtdata.output = output
+    rtdata.get_truth(f"truth/test_nirspec_ifu_spec3_moving_target/{output}")
+
+    # Adjust tolerance for machine precision for resampled data
+    if suffix == "s3d":
+        fitsdiff_default_kwargs["rtol"] = 1e-2
+        fitsdiff_default_kwargs["atol"] = 2e-4
+
+    # Compare the results
+    diff = FITSDiff(rtdata.output, rtdata.truth, **fitsdiff_default_kwargs)
+    assert diff.identical, diff.report()