Add test

Author: termoshtt

tests/outer.rs

@@ -2,9 +2,27 @@ include!("header.rs");
 use ndarray_linalg::vector::outer;
 
 #[test]
-fn outer_() {
+fn outer_3x4() {
     let dist = RealNormal::<f64>::new(0.0, 1.0);
-    let m = 2;
+    let m = 3;
+    let n = 4;
+    let a = Array::random(m, dist);
+    let b = Array::random(n, dist);
+    println!("a = \n{:?}", &a);
+    println!("b = \n{:?}", &b);
+    let ab = outer(&a, &b);
+    println!("ab = \n{:?}", &ab);
+    for i in 0..m {
+        for j in 0..n {
+            ab[(i, j)].assert_close(a[i] * b[j], 1e-7);
+        }
+    }
+}
+
+#[test]
+fn outer_4x3() {
+    let dist = RealNormal::<f64>::new(0.0, 1.0);
+    let m = 4;
     let n = 3;
     let a = Array::random(m, dist);
     let b = Array::random(n, dist);