feat: small refactor

tests/test_helpers_sql.py

@@ -0,0 +1,35 @@
+"""Tests for data_platform.helpers.sql — render_sql."""
+
+from pathlib import Path
+
+import pytest
+from jinja2 import TemplateNotFound
+
+from data_platform.helpers import render_sql
+
+
+_FIXTURES = Path(__file__).parent / "fixtures" / "sql"
+
+
+class TestRenderSql:
+    def test_renders_plain_sql(self, tmp_path):
+        sql_file = tmp_path / "plain.sql"
+        sql_file.write_text("select 1")
+        result = render_sql(tmp_path, "plain.sql")
+        assert result == "select 1"
+
+    def test_renders_with_variables(self, tmp_path):
+        sql_file = tmp_path / "schema.sql"
+        sql_file.write_text("create schema if not exists {{ schema }}")
+        result = render_sql(tmp_path, "schema.sql", schema="elo")
+        assert result == "create schema if not exists elo"
+
+    def test_missing_template_raises(self, tmp_path):
+        with pytest.raises(TemplateNotFound):
+            render_sql(tmp_path, "nonexistent.sql")
+
+    def test_multiple_variables(self, tmp_path):
+        sql_file = tmp_path / "multi.sql"
+        sql_file.write_text("select * from {{ schema }}.{{ table }}")
+        result = render_sql(tmp_path, "multi.sql", schema="raw", table="events")
+        assert result == "select * from raw.events"