add test_no_req_measures_for_mode_fixed

Author: FynnBe

tests/prediction_pipeline/test_processing.py

@@ -0,0 +1,39 @@
+import dataclasses
+
+import pytest
+
+from bioimageio.core.prediction_pipeline._processing import KNOWN_PROCESSING
+from bioimageio.core.prediction_pipeline._utils import FIXED
+
+try:
+    from typing import get_args
+except ImportError:
+    from typing_extensions import get_args  # type: ignore
+
+
+@pytest.mark.parametrize(
+    "proc",
+    list(KNOWN_PROCESSING["pre"].values()) + list(KNOWN_PROCESSING["post"].values()),
+)
+def test_no_req_measures_for_mode_fixed(proc):
+    # check if mode=fixed is valid for this proc
+    for f in dataclasses.fields(proc):
+        if f.name == "mode":
+            break
+    else:
+        raise AttributeError("Processing is missing mode attribute")
+    # mode is always annotated as literals (or literals of literals)
+    valid_modes = get_args(f.type)
+    for inner in get_args(f.type):
+        valid_modes += get_args(inner)
+
+    if FIXED not in valid_modes:
+        return
+
+    # we might be missing required kwargs. These have marshmallow.missing value as default
+    # and raise a TypeError is in __post_init__()
+    proc.__post_init__ = lambda self: None  # ignore missing kwargs
+
+    proc_instance = proc(tensor_name="tensor_name", mode=FIXED)
+    req_measures = proc_instance.get_required_measures()
+    assert not req_measures