SelectorMut first commit

tests/mutable.rs

@@ -0,0 +1,40 @@
+extern crate jsonpath_lib as jsonpath;
+#[macro_use]
+extern crate serde_json;
+
+use common::{read_json, setup};
+use jsonpath::{SelectorMut, Selector};
+use serde_json::Value;
+
+mod common;
+
+#[test]
+fn selector_mut() {
+    setup();
+
+    let mut selector_mut = SelectorMut::new();
+
+    let mut nums = Vec::new();
+    let result = selector_mut
+        .str_path(r#"$.store..price"#).unwrap()
+        .value(read_json("./benches/example.json"))
+        .replace_with(&mut |v| {
+            match v {
+                Value::Number(n) => {
+                    nums.push(n.as_f64().unwrap());
+                }
+                _ => {}
+            }
+            Value::String("a".to_string())
+        }).unwrap()
+        .take().unwrap();
+
+    assert_eq!(nums, vec![8.95_f64, 12.99_f64, 8.99_f64, 22.99_f64, 19.95_f64]);
+
+    let mut selector = Selector::new();
+    let result = selector.str_path(r#"$.store..price"#).unwrap()
+        .value(&result)
+        .select().unwrap();
+
+    assert_eq!(vec![&json!("a"), &json!("a"), &json!("a"), &json!("a"), &json!("a")], result);
+}