diff --git a/.travis.yml b/.travis.yml
index 66bee5a..efdaf02 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ branches:
 
 matrix:
   include:
-    - rust: nightly
+    - rust: stable
       os: linux
       env: RUST_BACKTRACE=1
       before_cache: |
@@ -31,6 +31,7 @@ matrix:
         - cargo test --verbose --all
         - cd wasm && cargo clippy -- -D warnings -A clippy::suspicious_else_formatting
         - cd ../nodejs/native && cargo clippy -- -D warnings
+        - cd ../../
       after_success: |
         cargo tarpaulin --exclude-files nodejs wasm parser/mod.rs --out Xml
         bash <(curl -s https://codecov.io/bash)
@@ -78,4 +79,40 @@ matrix:
         - npm -v
         - npm install
       script:
-        - npm test
\ No newline at end of file
+        - npm test
+    - language: node_js
+      os: linux
+      node_js:
+        - '11'
+        - '10'
+        - '9'
+        - '8'
+      before_install:
+        - curl https://sh.rustup.rs -sSf > /tmp/rustup.sh
+        - sh /tmp/rustup.sh -y
+        - export PATH="$HOME/.cargo/bin:$PATH"
+        - source "$HOME/.cargo/env"
+        - node -v
+        - npm -v
+      before_script:
+        - curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
+      script:
+        - bash ./build-wasm.sh
+    - language: node_js
+      os: osx
+      node_js:
+        - '11'
+        - '10'
+        - '9'
+        - '8'
+      before_install:
+        - curl https://sh.rustup.rs -sSf > /tmp/rustup.sh
+        - sh /tmp/rustup.sh -y
+        - export PATH="$HOME/.cargo/bin:$PATH"
+        - source "$HOME/.cargo/env"
+        - node -v
+        - npm -v
+      before_script:
+        - curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
+      script:
+        - bash ./build-wasm.sh
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index 63d167d..857d030 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,9 +24,6 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = { version = "1.0", features = ["preserve_order"] }
 array_tool = "1.0.3"
 
-[dev-dependencies]
-bencher = "0.1.5"
-
 [lib]
 name = "jsonpath_lib"
 path = "src/lib.rs"
diff --git a/bench.sh b/bench.sh
new file mode 100755
index 0000000..669778c
--- /dev/null
+++ b/bench.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+#
+# rustup default nightly
+#
+
+cargo bench --manifest-path ./benchmark/Cargo.toml
diff --git a/benchmark/.gitignore b/benchmark/.gitignore
new file mode 100644
index 0000000..3343429
--- /dev/null
+++ b/benchmark/.gitignore
@@ -0,0 +1,4 @@
+.idea/*
+.vscode
+/target/
+Cargo.lock
\ No newline at end of file
diff --git a/benchmark/Cargo.toml b/benchmark/Cargo.toml
new file mode 100644
index 0000000..fd5f6b2
--- /dev/null
+++ b/benchmark/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "jsonpath_lib_benches"
+version = "0.1.0"
+authors = ["Changseok Han <freestrings@gmail.com>"]
+description = "jsonpath_lib benchmark"
+license = "MIT"
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }
+serde_json = { version = "1.0", features = ["preserve_order"] }
+jsonpath_lib = { path = "../" }
+
+[dev-dependencies]
+bencher = "0.1.5"
+
+[[bin]]
+name = "jsonpath_lib_benches"
+path = "src/main.rs"
\ No newline at end of file
diff --git a/benches/bench_bin/.gitignore b/benchmark/bench_bin/.gitignore
similarity index 100%
rename from benches/bench_bin/.gitignore
rename to benchmark/bench_bin/.gitignore
diff --git a/benches/bench_bin/Cargo.toml b/benchmark/bench_bin/Cargo.toml
similarity index 100%
rename from benches/bench_bin/Cargo.toml
rename to benchmark/bench_bin/Cargo.toml
diff --git a/benches/bench_bin/bench.sh b/benchmark/bench_bin/bench.sh
similarity index 100%
rename from benches/bench_bin/bench.sh
rename to benchmark/bench_bin/bench.sh
diff --git a/benches/bench_bin/src/main.rs b/benchmark/bench_bin/src/main.rs
similarity index 100%
rename from benches/bench_bin/src/main.rs
rename to benchmark/bench_bin/src/main.rs
diff --git a/benches/bench_native.sh b/benchmark/bench_native.sh
similarity index 100%
rename from benches/bench_native.sh
rename to benchmark/bench_native.sh
diff --git a/benches/bench_wasm.sh b/benchmark/bench_wasm.sh
similarity index 100%
rename from benches/bench_wasm.sh
rename to benchmark/bench_wasm.sh
diff --git a/benches/bench.rs b/benchmark/benches/bench.rs
similarity index 98%
rename from benches/bench.rs
rename to benchmark/benches/bench.rs
index b2907b8..9cea0ea 100644
--- a/benches/bench.rs
+++ b/benchmark/benches/bench.rs
@@ -22,7 +22,7 @@ fn read_json(path: &str) -> String {
 }
 
 fn get_string() -> String {
-    read_json("./benches/example.json")
+    read_json("./example.json")
 }
 
 fn get_json() -> Value {
diff --git a/benches/bench_example.rs b/benchmark/benches/bench_example.rs
similarity index 96%
rename from benches/bench_example.rs
rename to benchmark/benches/bench_example.rs
index 3cd3764..f91b7c2 100644
--- a/benches/bench_example.rs
+++ b/benchmark/benches/bench_example.rs
@@ -19,7 +19,7 @@ fn read_json(path: &str) -> String {
 }
 
 fn get_string() -> String {
-    read_json("./benches/example.json")
+    read_json("./example.json")
 }
 
 fn get_json() -> Value {
diff --git a/benches/data_array.json b/benchmark/data_array.json
similarity index 100%
rename from benches/data_array.json
rename to benchmark/data_array.json
diff --git a/benches/data_obj.json b/benchmark/data_obj.json
similarity index 100%
rename from benches/data_obj.json
rename to benchmark/data_obj.json
diff --git a/benches/example.json b/benchmark/example.json
similarity index 100%
rename from benches/example.json
rename to benchmark/example.json
diff --git a/benches/giveme_every_thing_result.json b/benchmark/giveme_every_thing_result.json
similarity index 100%
rename from benches/giveme_every_thing_result.json
rename to benchmark/giveme_every_thing_result.json
diff --git a/benches/javascript/.gitignore b/benchmark/javascript/.gitignore
similarity index 100%
rename from benches/javascript/.gitignore
rename to benchmark/javascript/.gitignore
diff --git a/benches/javascript/bench.js b/benchmark/javascript/bench.js
similarity index 100%
rename from benches/javascript/bench.js
rename to benchmark/javascript/bench.js
diff --git a/benches/javascript/bench.sh b/benchmark/javascript/bench.sh
similarity index 100%
rename from benches/javascript/bench.sh
rename to benchmark/javascript/bench.sh
diff --git a/benches/javascript/package-lock.json b/benchmark/javascript/package-lock.json
similarity index 100%
rename from benches/javascript/package-lock.json
rename to benchmark/javascript/package-lock.json
diff --git a/benches/javascript/package.json b/benchmark/javascript/package.json
similarity index 100%
rename from benches/javascript/package.json
rename to benchmark/javascript/package.json
diff --git a/benches/package-lock.json b/benchmark/package-lock.json
similarity index 100%
rename from benches/package-lock.json
rename to benchmark/package-lock.json
diff --git a/benchmark/src/main.rs b/benchmark/src/main.rs
new file mode 100644
index 0000000..e71fdf5
--- /dev/null
+++ b/benchmark/src/main.rs
@@ -0,0 +1 @@
+fn main() {}
\ No newline at end of file
diff --git a/build.sh b/build.sh
index b9fbf00..cbb9198 100755
--- a/build.sh
+++ b/build.sh
@@ -11,7 +11,7 @@ WASM_BROWSER_PKG="${WASM}"/browser_pkg
 WASM_NODEJS_PKG="${WASM}"/nodejs_pkg
 WASM_ALL_PKG="${WASM}"/all_pkg
 WASM_TEST="${WASM}"/tests
-BENCHES="${DIR}"/benches
+BENCHES="${DIR}"/benchmark
 BENCHES_JS="${BENCHES}"/javascript
 NODEJS="${DIR}"/nodejs
 DOCS="${DIR}"/docs
diff --git a/src/lib.rs b/src/lib.rs
index 80e9cbb..d7caebb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -412,13 +412,8 @@ pub fn select_as<T: serde::de::DeserializeOwned>(
 /// ```
 pub fn delete(value: Value, path: &str) -> Result<Value, JsonPathError> {
     let mut selector = SelectorMut::default();
-    let ret = selector
-        .str_path(path)?
-        .value(value)
-        .delete()?
-        .take()
-        .unwrap_or(Value::Null);
-    Ok(ret)
+    let value = selector.str_path(path)?.value(value).delete()?;
+    Ok(value.take().unwrap_or(Value::Null))
 }
 
 /// Select JSON properties using a jsonpath and transform the result and then replace it. via closure that implements `FnMut` you can transform the selected results.
@@ -468,11 +463,6 @@ where
     F: FnMut(&Value) -> Value,
 {
     let mut selector = SelectorMut::default();
-    let ret = selector
-        .str_path(path)?
-        .value(value)
-        .replace_with(fun)?
-        .take()
-        .unwrap_or(Value::Null);
-    Ok(ret)
+    let value = selector.str_path(path)?.value(value).replace_with(fun)?;
+    Ok(value.take().unwrap_or(Value::Null))
 }
diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index 59080f8..4a44b3d 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -193,13 +193,14 @@ impl Parser {
 
     fn boolean(tokenizer: &mut TokenReader) -> ParseResult<Node> {
         debug!("#boolean");
+
+        fn validation_bool_value(v: &str) -> bool {
+            let b = v.as_bytes();
+            !b.is_empty() && (b[0] == b't' || b[0] == b'T' || b[0] == b'f' || b[0] == b'F')
+        }
+
         match tokenizer.next_token() {
-            Ok(Token::Key(_, ref v))
-                if {
-                    let b = v.as_bytes();
-                    !b.is_empty() && (b[0] == b't' || b[0] == b'T' || b[0] == b'f' || b[0] == b'F')
-                } =>
-            {
+            Ok(Token::Key(_, ref v)) if validation_bool_value(v) => {
                 Ok(Self::node(ParseToken::Bool(v.eq_ignore_ascii_case("true"))))
             }
             _ => Err(tokenizer.err_msg()),
@@ -229,10 +230,10 @@ impl Parser {
         debug!("#array_quote_value");
         match tokenizer.next_token() {
             Ok(Token::SingleQuoted(_, val)) | Ok(Token::DoubleQuoted(_, val)) => {
-                if !tokenizer.peek_is(COMMA) {
-                    Ok(Self::node(ParseToken::Key(val)))
-                } else {
+                if tokenizer.peek_is(COMMA) {
                     Self::array_keys(tokenizer, val)
+                } else {
+                    Ok(Self::node(ParseToken::Key(val)))
                 }
             }
             _ => Err(tokenizer.err_msg()),
diff --git a/src/parser/tokenizer.rs b/src/parser/tokenizer.rs
index bd5a15f..b2e04bb 100644
--- a/src/parser/tokenizer.rs
+++ b/src/parser/tokenizer.rs
@@ -94,6 +94,7 @@ impl Token {
         self.to_simple() == str_token
     }
 
+    #[cfg_attr(tarpaulin, skip)]
     fn to_simple(&self) -> &'static str {
         match self {
             Token::Absolute(_) => ABSOLUTE,
diff --git a/src/select/mod.rs b/src/select/mod.rs
index 3772ba7..b240b11 100644
--- a/src/select/mod.rs
+++ b/src/select/mod.rs
@@ -157,8 +157,8 @@ impl Cmp for CmpAnd {
         v1 && v2
     }
 
-    fn cmp_f64(&self, v1: f64, v2: f64) -> bool {
-        v1 > 0_f64 && v2 > 0_f64
+    fn cmp_f64(&self, _v1: f64, _v2: f64) -> bool {
+        true
     }
 
     fn cmp_string(&self, v1: &str, v2: &str) -> bool {
@@ -177,8 +177,8 @@ impl Cmp for CmpOr {
         v1 || v2
     }
 
-    fn cmp_f64(&self, v1: f64, v2: f64) -> bool {
-        v1 > 0_f64 || v2 > 0_f64
+    fn cmp_f64(&self, _v1: f64, _v2: f64) -> bool {
+        true
     }
 
     fn cmp_string(&self, v1: &str, v2: &str) -> bool {
@@ -190,7 +190,7 @@ impl Cmp for CmpOr {
     }
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 enum ExprTerm<'a> {
     String(String),
     Number(Number),
@@ -434,7 +434,7 @@ fn abs_index(n: isize, len: usize) -> usize {
     }
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 enum FilterKey {
     String(String),
     All,
@@ -482,28 +482,25 @@ impl<'a, 'b> Selector<'a, 'b> {
 
     pub fn str_path(&mut self, path: &str) -> Result<&mut Self, JsonPathError> {
         debug!("path : {}", path);
-
-        if self.node_ref.is_some() {
-            self.node_ref.take();
-        }
-
+        self.node_ref.take();
         self.node = Some(Parser::compile(path).map_err(JsonPathError::Path)?);
         Ok(self)
     }
 
     pub fn node_ref(&self) -> Option<&Node> {
         if let Some(node) = &self.node {
-            Some(node)
-        } else {
-            None
+            return Some(node);
         }
+
+        if let Some(node) = &self.node_ref {
+            return Some(*node);
+        }
+
+        None
     }
 
     pub fn compiled_path(&mut self, node: &'b Node) -> &mut Self {
-        if self.node.is_some() {
-            self.node.take();
-        }
-
+        self.node.take();
         self.node_ref = Some(node);
         self
     }
@@ -1195,3 +1192,212 @@ impl SelectorMut {
         Ok(self)
     }
 }
+
+#[cfg(test)]
+mod select_inner_tests {
+    use serde_json::{Number, Value};
+
+    use select::{Cmp, CmpAnd, CmpEq, CmpGe, CmpGt, CmpLe, CmpLt, CmpNe, CmpOr, ExprTerm};
+
+    #[test]
+    fn to_f64_i64() {
+        let number = 0_i64;
+        let v: Value = serde_json::from_str(&format!("{}", number)).unwrap();
+        if let Value::Number(n) = v {
+            assert_eq!((super::to_f64(&n) - number as f64).abs() == 0_f64, true);
+        } else {
+            panic!();
+        }
+    }
+
+    #[test]
+    fn to_f64_f64() {
+        let number = 0.1_f64;
+        let v: Value = serde_json::from_str(&format!("{}", number)).unwrap();
+        if let Value::Number(n) = v {
+            assert_eq!((super::to_f64(&n) - number).abs() == 0_f64, true);
+        } else {
+            panic!();
+        }
+    }
+
+    #[test]
+    fn to_f64_u64() {
+        let number = u64::max_value();
+        let v: Value = serde_json::from_str(&format!("{}", number)).unwrap();
+        if let Value::Number(n) = v {
+            assert_eq!((super::to_f64(&n) - number as f64).abs() == 0_f64, true);
+        } else {
+            panic!();
+        }
+    }
+
+    #[test]
+    fn cmp_eq() {
+        let cmp_fn = CmpEq;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), false);
+        assert_eq!(cmp_fn.cmp_bool(true, true), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.1), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.2), false);
+        assert_eq!(cmp_fn.cmp_string("1", "1"), true);
+        assert_eq!(cmp_fn.cmp_string("1", "2"), false);
+    }
+
+    #[test]
+    fn cmp_ne() {
+        let cmp_fn = CmpNe;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), true);
+        assert_eq!(cmp_fn.cmp_bool(true, true), false);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.1), false);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.2), true);
+        assert_eq!(cmp_fn.cmp_string("1", "1"), false);
+        assert_eq!(cmp_fn.cmp_string("1", "2"), true);
+    }
+
+    #[test]
+    fn cmp_gt() {
+        let cmp_fn = CmpGt;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), true);
+        assert_eq!(cmp_fn.cmp_bool(true, true), false);
+        assert_eq!(cmp_fn.cmp_f64(0.2, 0.1), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.2), false);
+        assert_eq!(cmp_fn.cmp_string("a", "a"), false);
+        assert_eq!(cmp_fn.cmp_string("b", "a"), true);
+        assert_eq!(cmp_fn.cmp_string("1", "2"), false);
+    }
+
+    #[test]
+    fn cmp_ge() {
+        let cmp_fn = CmpGe;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), true);
+        assert_eq!(cmp_fn.cmp_bool(true, true), true);
+        assert_eq!(cmp_fn.cmp_f64(0.2, 0.1), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.1), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.2), false);
+        assert_eq!(cmp_fn.cmp_string("1", "1"), true);
+        assert_eq!(cmp_fn.cmp_string("ab", "a"), true);
+        assert_eq!(cmp_fn.cmp_string("1", "2"), false);
+    }
+
+    #[test]
+    fn cmp_lt() {
+        let cmp_fn = CmpLt;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), false);
+        assert_eq!(cmp_fn.cmp_bool(false, true), true);
+        assert_eq!(cmp_fn.cmp_bool(true, true), false);
+        assert_eq!(cmp_fn.cmp_bool(false, false), false);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.2), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.1), false);
+        assert_eq!(cmp_fn.cmp_f64(0.2, 0.1), false);
+        assert_eq!(cmp_fn.cmp_string("a", "a"), false);
+        assert_eq!(cmp_fn.cmp_string("ab", "b"), true);
+        assert_eq!(cmp_fn.cmp_string("1", "2"), true);
+    }
+
+    #[test]
+    fn cmp_le() {
+        let cmp_fn = CmpLe;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), false);
+        assert_eq!(cmp_fn.cmp_bool(false, true), true);
+        assert_eq!(cmp_fn.cmp_bool(true, true), true);
+        assert_eq!(cmp_fn.cmp_bool(false, false), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.2), true);
+        assert_eq!(cmp_fn.cmp_f64(0.1, 0.1), true);
+        assert_eq!(cmp_fn.cmp_f64(0.2, 0.1), false);
+        assert_eq!(cmp_fn.cmp_string("a", "a"), true);
+        assert_eq!(cmp_fn.cmp_string("ab", "b"), true);
+        assert_eq!(cmp_fn.cmp_string("abd", "abc"), false);
+        assert_eq!(cmp_fn.cmp_string("1", "2"), true);
+    }
+
+    #[test]
+    fn cmp_and() {
+        let cmp_fn = CmpAnd;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), false);
+        assert_eq!(cmp_fn.cmp_bool(false, true), false);
+        assert_eq!(cmp_fn.cmp_bool(true, true), true);
+        assert_eq!(cmp_fn.cmp_bool(false, false), false);
+        assert_eq!(cmp_fn.cmp_f64(0.0, 0.0), true);
+        assert_eq!(cmp_fn.cmp_string("a", "a"), true);
+    }
+
+    #[test]
+    fn cmp_or() {
+        let cmp_fn = CmpOr;
+        assert_eq!(cmp_fn.default(), false);
+        assert_eq!(cmp_fn.cmp_bool(true, false), true);
+        assert_eq!(cmp_fn.cmp_bool(false, true), true);
+        assert_eq!(cmp_fn.cmp_bool(true, true), true);
+        assert_eq!(cmp_fn.cmp_bool(false, false), false);
+        assert_eq!(cmp_fn.cmp_f64(0.0, 0.0), true);
+        assert_eq!(cmp_fn.cmp_string("a", "a"), true);
+    }
+
+    #[test]
+    fn cmp_json() {
+        let v1 = Value::Bool(true);
+        let v2 = Value::String("1".to_string());
+        let left = [&v1, &v2];
+        let right = [&v1, &v2];
+        let empty: Vec<&Value> = Vec::new();
+
+        assert_eq!(CmpEq.cmp_json(&left, &right), left.to_vec());
+        assert_eq!(CmpNe.cmp_json(&left, &right), left.to_vec());
+        assert_eq!(CmpGt.cmp_json(&left, &right), empty);
+        assert_eq!(CmpGe.cmp_json(&left, &right), empty);
+        assert_eq!(CmpLt.cmp_json(&left, &right), empty);
+        assert_eq!(CmpLe.cmp_json(&left, &right), empty);
+        assert_eq!(CmpAnd.cmp_json(&left, &right), left.to_vec());
+        assert_eq!(CmpOr.cmp_json(&left, &right), left.to_vec());
+
+        assert_eq!(
+            CmpEq.cmp_json(&[&Value::Bool(true)], &[&Value::Bool(true)]),
+            vec![&Value::Bool(true)]
+        );
+        assert_eq!(
+            CmpEq.cmp_json(&[&Value::Bool(true)], &[&Value::Bool(false)]),
+            empty
+        );
+        assert_eq!(
+            CmpNe.cmp_json(&[&Value::Bool(true)], &[&Value::Bool(true)]),
+            empty
+        );
+        assert_eq!(
+            CmpNe.cmp_json(&[&Value::Bool(false)], &[&Value::Bool(true)]),
+            vec![&Value::Bool(false)]
+        );
+        assert_eq!(
+            CmpAnd.cmp_json(&[&Value::Bool(true)], &[&Value::Bool(true)]),
+            vec![&Value::Bool(true)]
+        );
+        assert_eq!(
+            CmpOr.cmp_json(&[&Value::Bool(true)], &[&Value::Bool(false)]),
+            vec![&Value::Bool(true), &Value::Bool(false)]
+        );
+    }
+
+    #[test]
+    fn value_vec_into() {
+        let v = Value::Bool(true);
+        let vec = &vec![&v];
+        let term: ExprTerm = vec.into();
+        assert_eq!(term, ExprTerm::Bool(true));
+
+        let v = Value::String("a".to_string());
+        let vec = &vec![&v];
+        let term: ExprTerm = vec.into();
+        assert_eq!(term, ExprTerm::String("a".to_string()));
+
+        let v = serde_json::from_str("1.0").unwrap();
+        let vec = &vec![&v];
+        let term: ExprTerm = vec.into();
+        assert_eq!(term, ExprTerm::Number(Number::from_f64(1.0).unwrap()));
+    }
+}
diff --git a/tests/filter.rs b/tests/filter.rs
index 4540039..112cfd3 100644
--- a/tests/filter.rs
+++ b/tests/filter.rs
@@ -13,7 +13,7 @@ fn array() {
 
     select_and_then_compare(
         "$.school.friends[1, 2]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([
             {"id": 1, "name": "Vincent Cannon" },
             {"id": 2, "name": "Gray Berry"}
@@ -22,7 +22,7 @@ fn array() {
 
     select_and_then_compare(
         "$.school.friends[1: ]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([
             {"id": 1, "name": "Vincent Cannon" },
             {"id": 2, "name": "Gray Berry"}
@@ -31,7 +31,7 @@ fn array() {
 
     select_and_then_compare(
         "$.school.friends[:-2]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([
             {"id": 0, "name": "Millicent Norman"}
         ]),
@@ -39,13 +39,13 @@ fn array() {
 
     select_and_then_compare(
         "$..friends[2].name",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!(["Gray Berry", "Gray Berry"]),
     );
 
     select_and_then_compare(
         "$..friends[*].name",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([
             "Vincent Cannon",
             "Gray Berry",
@@ -57,19 +57,19 @@ fn array() {
 
     select_and_then_compare(
         "$['school']['friends'][*].['name']",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!(["Millicent Norman", "Vincent Cannon", "Gray Berry"]),
     );
 
     select_and_then_compare(
         "$['school']['friends'][0].['name']",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!(["Millicent Norman"]),
     );
 
     select_and_then_compare(
         r#"$.["eyeColor", "name"]"#,
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!(["blue", "Leonor Herman"]),
     );
 }
@@ -80,7 +80,7 @@ fn return_type() {
 
     select_and_then_compare(
         "$.school",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([{
             "friends": [
                 {"id": 0, "name": "Millicent Norman"},
@@ -92,7 +92,7 @@ fn return_type() {
 
     select_and_then_compare(
         "$.school[?(@.friends[0])]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([{
             "friends": [
                 {"id": 0, "name": "Millicent Norman"},
@@ -104,7 +104,7 @@ fn return_type() {
 
     select_and_then_compare(
         "$.school[?(@.friends[10])]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([{
             "friends": [
                 {"id": 0, "name": "Millicent Norman"},
@@ -116,7 +116,7 @@ fn return_type() {
 
     select_and_then_compare(
         "$.school[?(1==1)]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([{
             "friends": [
                 {"id": 0, "name": "Millicent Norman"},
@@ -128,7 +128,7 @@ fn return_type() {
 
     select_and_then_compare(
         "$.school.friends[?(1==1)]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([[
             {"id": 0, "name": "Millicent Norman"},
             {"id": 1, "name": "Vincent Cannon" },
@@ -143,7 +143,7 @@ fn op_default() {
 
     select_and_then_compare(
         "$.school[?(@.friends == @.friends)]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([{
             "friends": [
                 {"id": 0, "name": "Millicent Norman"},
@@ -155,7 +155,7 @@ fn op_default() {
 
     select_and_then_compare(
         "$.friends[?(@.name)]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([
             { "id" : 1, "name" : "Vincent Cannon" },
             { "id" : 2, "name" : "Gray Berry" }
@@ -164,7 +164,7 @@ fn op_default() {
 
     select_and_then_compare(
         "$.friends[?(@.id >= 2)]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([
             { "id" : 2, "name" : "Gray Berry" }
         ]),
@@ -172,7 +172,7 @@ fn op_default() {
 
     select_and_then_compare(
         "$.friends[?(@.id >= 2 || @.id == 1)]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([
             { "id" : 2, "name" : "Gray Berry" },
             { "id" : 1, "name" : "Vincent Cannon" }
@@ -181,25 +181,25 @@ fn op_default() {
 
     select_and_then_compare(
         "$.friends[?( (@.id >= 2 || @.id == 1) && @.id == 0)]",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([Value::Null]),
     );
 
     select_and_then_compare(
         "$..friends[?(@.id == $.index)].id",
-        read_json("./benches/data_obj.json"),
+        read_json("./benchmark/data_obj.json"),
         json!([0, 0]),
     );
 
     select_and_then_compare(
         "$..book[?($.store.bicycle.price < @.price)].price",
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([22.99]),
     );
 
     select_and_then_compare(
         "$..book[?( (@.price == 12.99 || @.category == 'reference') && @.price > 10)].price",
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([12.99]),
     );
 
@@ -365,7 +365,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$.store.book[*].author"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             "Nigel Rees",
             "Evelyn Waugh",
@@ -376,7 +376,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$..author"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             "Nigel Rees",
             "Evelyn Waugh",
@@ -387,7 +387,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$.store.*"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
              [
                 {"category" : "reference", "author" : "Nigel Rees","title" : "Sayings of the Century", "price" : 8.95},
@@ -401,13 +401,13 @@ fn example() {
 
     select_and_then_compare(
         r#"$.store..price"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([8.95, 12.99, 8.99, 22.99, 19.95]),
     );
 
     select_and_then_compare(
         r#"$..book[2]"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             {
             "category" : "fiction",
@@ -421,7 +421,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$..book[-2]"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             {
                 "category" : "fiction",
@@ -435,7 +435,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$..book[0, 1]"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             {
                 "category" : "reference",
@@ -454,7 +454,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$..book[:2]"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             {
                 "category" : "reference",
@@ -473,7 +473,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$..book[2:]"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             {
                 "category" : "fiction",
@@ -494,7 +494,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$..book[?(@.isbn)]"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             {
                 "category" : "fiction",
@@ -515,7 +515,7 @@ fn example() {
 
     select_and_then_compare(
         r#"$.store.book[?(@.price < 10)]"#,
-        read_json("./benches/example.json"),
+        read_json("./benchmark/example.json"),
         json!([
             {
                 "category" : "reference",
@@ -535,8 +535,8 @@ fn example() {
 
     select_and_then_compare(
         r#"$..*"#,
-        read_json("./benches/example.json"),
-        read_json("./benches/giveme_every_thing_result.json"),
+        read_json("./benchmark/example.json"),
+        read_json("./benchmark/giveme_every_thing_result.json"),
     );
 }
 
@@ -651,7 +651,7 @@ fn all_filter() {
     for path in &[r#"$..friends.*"#, r#"$[*].friends.*"#] {
         select_and_then_compare(
             path,
-            read_json("./benches/data_array.json"),
+            read_json("./benchmark/data_array.json"),
             json!([
                { "id" : 0, "name" : "Millicent Norman" },
                { "id" : 1, "name" : "Vincent Cannon" },
diff --git a/tests/lib.rs b/tests/lib.rs
index 1ee8780..5ed8fc4 100644
--- a/tests/lib.rs
+++ b/tests/lib.rs
@@ -15,7 +15,7 @@ mod common;
 fn compile() {
     let compile_object = |path| {
         let mut template = jsonpath::compile(path);
-        let json_obj = read_json("./benches/data_obj.json");
+        let json_obj = read_json("./benchmark/data_obj.json");
         let json = template(&json_obj).unwrap();
         let ret = json!([
             {"id": 2,"name": "Gray Berry"},
@@ -26,7 +26,7 @@ fn compile() {
 
     let compile_array = |path| {
         let mut template = jsonpath::compile(path);
-        let json_obj = read_json("./benches/data_array.json");
+        let json_obj = read_json("./benchmark/data_array.json");
         let json = template(&json_obj).unwrap();
         let ret = json!([
             {"id": 2,"name": "Gray Berry"},
@@ -59,7 +59,7 @@ fn selector() {
         compare_result(json, target);
     };
 
-    let json_obj = read_json("./benches/data_obj.json");
+    let json_obj = read_json("./benchmark/data_obj.json");
     let mut selector = jsonpath::selector(&json_obj);
 
     select(
@@ -96,7 +96,7 @@ fn selector_as() {
         assert_eq!(json, target);
     };
 
-    let json_obj = read_json("./benches/data_obj.json");
+    let json_obj = read_json("./benchmark/data_obj.json");
     let mut selector = jsonpath::selector_as::<Friend>(&json_obj);
 
     select(
@@ -129,7 +129,7 @@ fn selector_as() {
 
 #[test]
 fn select() {
-    let json_obj = read_json("./benches/example.json");
+    let json_obj = read_json("./benchmark/example.json");
     let json = jsonpath::select(&json_obj, "$..book[2]").unwrap();
     let ret = json!([{
         "category" : "fiction",
@@ -143,7 +143,7 @@ fn select() {
 
 #[test]
 fn select_str() {
-    let json_str = read_contents("./benches/example.json");
+    let json_str = read_contents("./benchmark/example.json");
     let result_str = jsonpath::select_as_str(&json_str, "$..book[2]").unwrap();
     let ret = json!([{
         "category" : "fiction",
diff --git a/tests/readme.rs b/tests/readme.rs
index 2ca2274..ae2a02c 100644
--- a/tests/readme.rs
+++ b/tests/readme.rs
@@ -482,7 +482,7 @@ fn readme_delete() {
 
 #[test]
 fn readme_delete2() {
-    let json_obj = common::read_json("./benches/example.json");
+    let json_obj = common::read_json("./benchmark/example.json");
 
     let ret = jsonpath::delete(json_obj, "$.store.book").unwrap();
 
diff --git a/tests/mutable.rs b/tests/selector.rs
similarity index 76%
rename from tests/mutable.rs
rename to tests/selector.rs
index 6ae6205..c8f2da8 100644
--- a/tests/mutable.rs
+++ b/tests/selector.rs
@@ -3,7 +3,7 @@ extern crate jsonpath_lib as jsonpath;
 extern crate serde_json;
 
 use common::{read_json, setup};
-use jsonpath::{Selector, SelectorMut};
+use jsonpath::{Selector, SelectorMut, Parser};
 use serde_json::Value;
 
 mod common;
@@ -18,7 +18,7 @@ fn selector_mut() {
     let result = selector_mut
         .str_path(r#"$.store..price"#)
         .unwrap()
-        .value(read_json("./benches/example.json"))
+        .value(read_json("./benchmark/example.json"))
         .replace_with(&mut |v| {
             if let Value::Number(n) = v {
                 nums.push(n.as_f64().unwrap());
@@ -53,3 +53,11 @@ fn selector_mut() {
         result
     );
 }
+
+#[test]
+fn selector_node_ref() {
+    let node = Parser::compile("$.*").unwrap();
+    let mut selector = Selector::default();
+    selector.compiled_path(&node);
+    assert!(std::ptr::eq(selector.node_ref().unwrap(), &node));
+}