Provide required missing context to resolve sql_header in unit tests

Author: Kayrnt

.changes/unreleased/Fixes-20250327-002711.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Provide required missing context to resolve sql_header in unit tests
+time: 2025-03-27T00:27:11.364727+01:00
+custom:
+    Author: Kayrnt
+    Issue: "9775"

core/dbt/parser/unit_tests.py

@@ -10,7 +10,11 @@
 from dbt.artifacts.resources import ModelConfig, UnitTestConfig, UnitTestFormat
 from dbt.config import RuntimeConfig
 from dbt.context.context_config import ContextConfig
-from dbt.context.providers import generate_parse_exposure, get_rendered
+from dbt.context.providers import (
+    generate_parse_exposure,
+    generate_runtime_unit_test_context,
+    get_rendered,
+)
 from dbt.contracts.files import FileHash, SchemaSourceFile
 from dbt.contracts.graph.manifest import Manifest
 from dbt.contracts.graph.model_config import UnitTestNodeConfig
@@ -99,13 +103,17 @@ def parse_unit_test_case(self, test_case: UnitTestDefinition):
             tested_node_unique_id=tested_node.unique_id,
             overrides=test_case.overrides,
         )
-
-        ctx = generate_parse_exposure(
-            unit_test_node,  # type: ignore
-            self.root_project,
-            self.manifest,
-            test_case.package_name,
+        # setting up the execution environment for a dbt unit test by creating a context with all the necessary functions and objects
+        ctx = generate_runtime_unit_test_context(unit_test_node, self.root_project, self.manifest)
+        ctx.update(
+            generate_parse_exposure(
+                unit_test_node,  # type: ignore
+                self.root_project,
+                self.manifest,
+                test_case.package_name,
+            )
         )
+
         get_rendered(unit_test_node.raw_code, ctx, unit_test_node, capture_macros=True)
         # unit_test_node now has a populated refs/sources
 

core/dbt/task/test.py

@@ -237,6 +237,12 @@ def execute_unit_test(
                 "Invalid materialization context generated, missing config: {}".format(context)
             )
 
+        # allows test code to access the configuration settings of the component it's testing
+        if unit_test_node.tested_node_unique_id:
+            context["tested_node_config"] = manifest.nodes[
+                unit_test_node.tested_node_unique_id
+            ].config
+
         # generate materialization macro
         macro_func = MacroGenerator(materialization_macro, context)
         try: