updating unit tests

Author: Jiayu Liu

datafusion/src/physical_plan/windows.rs

@@ -119,7 +119,7 @@ fn create_built_in_window_expr(
             Ok(Arc::new(LastValue::new(arg, name, data_type)))
         }
         _ => Err(DataFusionError::NotImplemented(format!(
-            "window function with {:?} not yet implemented",
+            "Window function with {:?} not yet implemented",
             fun
         ))),
     }

datafusion/tests/sql.rs

@@ -807,15 +807,18 @@ async fn csv_query_window_with_empty_over() -> Result<()> {
     avg(c3) over (), \
     count(c3) over (), \
     max(c3) over (), \
-    min(c3) over () \
+    min(c3) over (), \
+    first_value(c3) over (), \
+    last_value(c3) over (), \
+    nth_value(c3, 2) over ()
     from aggregate_test_100 limit 5";
     let actual = execute(&mut ctx, sql).await;
     let expected = vec![
-        vec!["2", "781", "7.81", "100", "125", "-117"],
-        vec!["5", "781", "7.81", "100", "125", "-117"],
-        vec!["1", "781", "7.81", "100", "125", "-117"],
-        vec!["1", "781", "7.81", "100", "125", "-117"],
-        vec!["5", "781", "7.81", "100", "125", "-117"],
+        vec!["2", "781", "7.81", "100", "125", "-117", "1", "30", "-40"],
+        vec!["5", "781", "7.81", "100", "125", "-117", "1", "30", "-40"],
+        vec!["1", "781", "7.81", "100", "125", "-117", "1", "30", "-40"],
+        vec!["1", "781", "7.81", "100", "125", "-117", "1", "30", "-40"],
+        vec!["5", "781", "7.81", "100", "125", "-117", "1", "30", "-40"],
     ];
     assert_eq!(expected, actual);
     Ok(())