fix: improve assertion messages for transducer data validation

Author: jirhiker

tests/features/steps/transducer.py

@@ -30,7 +30,7 @@ def step_impl(context):
         sql = select(TransducerObservation)
         transducer_observations = session.execute(sql).scalars().all()
         context.transducer_observations = transducer_observations
-        assert len(transducer_observations) > 0
+        assert len(transducer_observations) > 0, "No transducer observations found"
 
 
 @when("the user requests transducer data for a non-existing well")
@@ -52,17 +52,17 @@ def step_impl(context):
 def step_impl(context):
     data = context.response.json()
     context.data = data["items"]
-    assert len(context.data) > 0, context.data
+    assert len(context.data) > 0, "Expected at least one transducer data entry"
 
 
 @then("each transducer data entry should include a timestamp, value, status")
 def step_impl(context):
     item = context.data[0]["observation"]
     block = context.data[0]["block"]
 
-    assert "observation_datetime" in item
-    assert "value" in item
-    assert "review_status" in block
+    assert "observation_datetime" in item, f"Expected a timestamp in the data {item}"
+    assert "value" in item, f"Expected a value in the data {item}"
+    assert "review_status" in block, f"Expected a review_status in the block {block}"
 
     context.timestamp = item["observation_datetime"]
     context.value = item["value"]
@@ -75,7 +75,9 @@ def step_impl(context):
     from datetime import datetime
 
     dt = datetime.fromisoformat(context.timestamp)
-    assert isinstance(dt, datetime)
+    assert isinstance(
+        dt, datetime
+    ), f"Timestamp is not in ISO 8601 format: {context.timestamp}"
 
 
 @then("the value should be a numeric type")
@@ -85,7 +87,7 @@ def step_impl(context):
 
 @then('the status should be one of "Draft", "Corrected"')
 def step_impl(context):
-    assert context.status in ("not reviewed",)
+    assert context.status in ("not reviewed",), f"Unexpected status: {context.status}"
 
 
 # ============= EOF =============================================