()
| 121 | |
| 122 | #[test] |
| 123 | fn test_head() { |
| 124 | let df = sample_df(); |
| 125 | let h = df.head(2); |
| 126 | assert_eq!(h.nrow(), 2); |
| 127 | assert_eq!(h.ncol(), 3); |
| 128 | assert_eq!(h["x"], Series::new(vec![1, 2])); |
| 129 | assert_eq!(h["y"], Series::new(vec![0.1, 0.2])); |
| 130 | } |
| 131 | |
| 132 | #[test] |
| 133 | fn test_head_larger_than_nrow() { |