use ndarray::prelude::*; fn into_raw_vec_capacity(a: Array) -> usize { a.into_raw_vec_and_offset().0.capacity() } #[test] fn reserve_1d() { let mut a = Array1::::zeros((4,)); a.reserve(Axis(0), 1000).unwrap(); assert_eq!(a.shape(), &[4]); assert!(into_raw_vec_capacity(a) >= 1004); } #[test] fn reserve_3d() { let mut a = Array3::::zeros((0, 4, 8)); a.reserve(Axis(0), 10).unwrap(); assert_eq!(a.shape(), &[0, 4, 8]); assert!(into_raw_vec_capacity(a) >= 4 * 8 * 10); } #[test] fn reserve_empty_3d() { let mut a = Array3::::zeros((0, 0, 0)); a.reserve(Axis(0), 10).unwrap(); } #[test] fn reserve_3d_axis1() { let mut a = Array3::::zeros((2, 4, 8)); a.reserve(Axis(1), 10).unwrap(); assert!(into_raw_vec_capacity(a) >= 2 * 8 * 10); } #[test] fn reserve_3d_repeat() { let mut a = Array3::::zeros((2, 4, 8)); a.reserve(Axis(1), 10).unwrap(); a.reserve(Axis(2), 30).unwrap(); assert!(into_raw_vec_capacity(a) >= 2 * 4 * 30); } #[test] fn reserve_2d_with_data() { let mut a = array![[1, 2], [3, 4], [5, 6]]; a.reserve(Axis(1), 100).unwrap(); assert_eq!(a, array![[1, 2], [3, 4], [5, 6]]); assert!(into_raw_vec_capacity(a) >= 3 * 100); } #[test] fn reserve_2d_inverted_with_data() { let mut a = array![[1, 2], [3, 4], [5, 6]]; a.invert_axis(Axis(1)); assert_eq!(a, array![[2, 1], [4, 3], [6, 5]]); a.reserve(Axis(1), 100).unwrap(); assert_eq!(a, array![[2, 1], [4, 3], [6, 5]]); let (raw_vec, offset) = a.into_raw_vec_and_offset(); assert!(raw_vec.capacity() >= 3 * 100); assert_eq!(offset, Some(1)); }