Add test for default

Signed-off-by: Heinz N. Gies <[email protected]>

src/lib.rs

@@ -242,6 +242,12 @@ mod test {
     use simd_json::borrowed::Object;
     use simd_json::BorrowedValue;
 
+    #[test]
+    fn default() {
+        let d = Pattern::default();
+        let p = Pattern::compile("%{key}:%{val}").expect("compile");
+        assert_eq!(d, p);
+    }
     #[test]
     fn test_multisplit() {
         let seps = vec![String::from(" "), String::from(";")];