Bugfix for the contiguous strides.

src/shape.rs

@@ -109,7 +109,8 @@ impl Shape {
     /// The strides given in number of elements for a contiguous n-dimensional
     /// arrays using this shape.
     pub(crate) fn stride_contiguous(&self) -> Vec<usize> {
-        self.0
+        let mut stride: Vec<_> = self
+            .0
             .iter()
             .rev()
             .scan(1, |prod, u| {
@@ -117,6 +118,25 @@ impl Shape {
                 *prod *= u;
                 Some(prod_pre_mult)
             })
-            .collect()
+            .collect();
+        stride.reverse();
+        stride
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn stride() {
+        let shape = Shape::from(());
+        assert_eq!(shape.stride_contiguous(), []);
+        let shape = Shape::from(42);
+        assert_eq!(shape.stride_contiguous(), [1]);
+        let shape = Shape::from((42, 1337));
+        assert_eq!(shape.stride_contiguous(), [1337, 1]);
+        let shape = Shape::from((299, 792, 458));
+        assert_eq!(shape.stride_contiguous(), [458 * 792, 458, 1]);
     }
 }