test(golden): run_package_pipeline — in-process package

Walks packageable artifact properties (using RESOURCES_WITH_LOCAL_PATHS
+ RESOURCES_WITH_IMAGE_COMPONENT) and rewrites each to a deterministic
s3://golden-bucket/<sha256>. Runs _export_global_artifacts_pass before
and after rewriting to mirror PR #9030's pre-LE AWS::Include pass.

Author: bnusunny

tests/golden/test_harness_package.py

@@ -0,0 +1,47 @@
+"""Unit tests for run_package_pipeline."""
+
+from pathlib import Path
+
+import pytest
+
+from tests.golden.harness import run_build_pipeline, run_package_pipeline
+
+CASES_ROOT = Path(__file__).parent / "templates"
+
+
+def test_package_sam_case_rewrites_code_to_s3_uri():
+    case = CASES_ROOT / "sam_resources" / "serverless_function_zip"
+    build_out = run_build_pipeline(case / "template.yaml", language_extensions=False)
+    pkg_out = run_package_pipeline(case / "template.yaml", build_out)
+    code = pkg_out["Resources"]["HelloFunction"]["Properties"]["Code"]
+    assert isinstance(code, dict)  # CFN Lambda Code becomes S3Bucket/S3Key dict
+    s3_uri_field = code.get("S3Bucket") or code.get("ImageUri") or ""
+    assert s3_uri_field == "golden-bucket"
+
+
+def test_package_le_case_rewrites_each_expanded_codeuri():
+    case = CASES_ROOT / "language_extensions" / "foreach_static_zip"
+    build_out = run_build_pipeline(case / "template.yaml", language_extensions=True)
+    pkg_out = run_package_pipeline(case / "template.yaml", build_out)
+    for fn_id in ("AlphaFunction", "BetaFunction"):
+        code = pkg_out["Resources"][fn_id]["Properties"]["Code"]
+        assert isinstance(code, dict)
+        assert code.get("S3Bucket") == "golden-bucket"
+
+
+def test_package_cfn_case_rewrites_raw_code_path():
+    case = CASES_ROOT / "packageable_resources" / "lambda_function_zip"
+    build_out = run_build_pipeline(case / "template.yaml", language_extensions=False)
+    pkg_out = run_package_pipeline(case / "template.yaml", build_out)
+    code = pkg_out["Resources"]["HelloFunction"]["Properties"]["Code"]
+    assert isinstance(code, dict)
+    assert code.get("S3Bucket") == "golden-bucket"
+
+
+def test_package_is_deterministic():
+    """Same input produces same output across runs."""
+    case = CASES_ROOT / "sam_resources" / "serverless_function_zip"
+    build_out = run_build_pipeline(case / "template.yaml", language_extensions=False)
+    a = run_package_pipeline(case / "template.yaml", build_out)
+    b = run_package_pipeline(case / "template.yaml", build_out)
+    assert a == b