Add TryFrom<&[T]> tests

Author: calebzulawski

crates/core_simd/tests/try_from_slice.rs

@@ -0,0 +1,25 @@
+#![feature(portable_simd)]
+
+#[cfg(target_arch = "wasm32")]
+use wasm_bindgen_test::*;
+
+#[cfg(target_arch = "wasm32")]
+wasm_bindgen_test_configure!(run_in_browser);
+
+use core_simd::i32x4;
+
+#[test]
+#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
+fn try_from_slice() {
+    // Equal length
+    assert_eq!(
+        i32x4::try_from([1, 2, 3, 4].as_slice()).unwrap(),
+        i32x4::from_array([1, 2, 3, 4])
+    );
+
+    // Slice length > vector length
+    assert!(i32x4::try_from([1, 2, 3, 4, 5].as_slice()).is_err());
+
+    // Slice length < vector length
+    assert!(i32x4::try_from([1, 2, 3].as_slice()).is_err());
+}