verify test plan start and end dates

Author: themisvaltinos

tests/core/test_context.py

@@ -1207,11 +1207,17 @@ def test_plan_seed_model_excluded_from_default_end(copy_to_temp_path: t.Callable
         assert max_ends[seed_fqns[0]] == to_timestamp("2024-06-01")
 
         # the plan start date 2025-01-01 is after the seeds end date but shouldnt cause the plan to fail
-        context.plan(
+        plan = context.plan(
             "dev",
             start="2025-01-01",
             no_prompts=True,
         )
+
+        # the end should fall back to execution_time rather than seeds end
+        assert plan.provided_end is None
+        assert plan.provided_start == "2025-01-01"
+        assert to_timestamp(plan.end) == to_timestamp("2026-03-01")
+        assert to_timestamp(plan.start) == to_timestamp("2025-01-01")
         context.close()