Update test

tests/test_basic_flat_file.py

@@ -1,8 +1,27 @@
 def test_flat_file_runs():
     import taxcalc as tc
     from tax_microdata_benchmarking.create_flat_file import create_flat_file
+    import pandas as pd
 
-    create_flat_file()
+    cps_based_flat_file = create_flat_file(source_dataset="enhanced_cps_2022")
+
+    try:
+        puf_based_flat_file = create_flat_file(source_dataset="puf_2022")
+        nonfilers_file = cps_based_flat_file[
+            cps_based_flat_file.is_tax_filer == 0
+        ]
+        stacked_file = pd.concat([puf_based_flat_file, nonfilers_file])
+        cps_based_flat_file.to_csv(
+            "tax_microdata_cps_based.csv.gz", index=False
+        )
+        puf_based_flat_file.to_csv(
+            "tax_microdata_puf_based.csv.gz", index=False
+        )
+        nonfilers_file.to_csv("tax_microdata_nonfilers.csv.gz", index=False)
+        stacked_file.to_csv("tax_microdata.csv.gz", index=False)
+    except:
+        print("PUF-based data not available.")
+        cps_based_flat_file.to_csv("tax_microdata.csv.gz", index=False)
 
     input_data = tc.Records("tax_microdata.csv.gz")
     policy = tc.Policy()