Move code to code dir

Follow yoda

code/tests/test_validate_packages.py

@@ -0,0 +1,24 @@
+import dataframely as dy
+import polars as pl
+
+from tests.test_validate_date_col import DateSchema
+
+
+class PackagesSchema(DateSchema):
+    package: dy.String = dy.String(nullable=False)
+    version: dy.String = dy.String(nullable=False)
+    count: dy.Integer = dy.Integer(nullable=False)
+
+
+def test_packages_schema():
+    _ = PackagesSchema.validate(
+        pl.scan_csv(
+            "output/packages.csv",
+            schema={
+                "date": pl.Date,
+                "package": pl.String,
+                "version": pl.String,
+                "count": pl.UInt16,
+            },
+        ).collect(engine="streaming")
+    )