Move code to code dir

Follow yoda

code/tests/test_validate_files.py

@@ -0,0 +1,24 @@
+import dataframely as dy
+import polars as pl
+
+from tests.test_validate_date_col import DateSchema
+
+
+class FilesSchema(DateSchema):
+    filename: dy.String = dy.String(nullable=False)
+    mtime: dy.Float = dy.Float(nullable=False)
+    filesize: dy.Integer = dy.Integer(nullable=False)
+
+
+def test_files_schema():
+    _ = FilesSchema.validate(
+        pl.scan_csv(
+            "output/files.csv",
+            schema={
+                "date": pl.Date,
+                "filename": pl.String,
+                "mtime": pl.Float32,
+                "filesize": pl.UInt32,
+            },
+        ).collect(engine="streaming")
+    )