close #37

.idea/runConfigurations/filter.xml

@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="filter" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --package jsonpath_lib --test filter &quot;&quot;" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="false" />
-    <option name="backtrace" value="SHORT" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>

.idea/runConfigurations/lib.xml

@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="lib" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --package jsonpath_lib --test lib &quot;&quot;" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="false" />
-    <option name="backtrace" value="SHORT" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>

.idea/runConfigurations/mutable.xml

@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="mutable" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --package jsonpath_lib --test mutable &quot;&quot;" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="false" />
-    <option name="backtrace" value="SHORT" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>

.idea/runConfigurations/readme.xml

@@ -1,12 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="readme" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="channel" value="DEFAULT" />
-    <option name="command" value="test --package jsonpath_lib --test readme &quot;&quot;" />
-    <option name="allFeatures" value="false" />
-    <option name="nocapture" value="false" />
-    <option name="backtrace" value="SHORT" />
-    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
-    <envs />
-    <method v="2" />
-  </configuration>
-</component>

.travis.yml

@@ -24,15 +24,9 @@ matrix:
       before_script:
         - rustup component add clippy
       script:
-        - cargo clean
+        - ./clippy.sh
-        - cargo clippy -- -D warnings
-        - cargo build --verbose --all
-        - cargo clippy --all-targets --all-features -- -D warnings -A clippy::cognitive_complexity
-        - cargo test --verbose --all
-        - cd wasm && cargo clippy -- -D warnings -A clippy::suspicious_else_formatting
-        - cd ../../
       after_success: |
-        cargo tarpaulin --exclude-files nodejs wasm parser/mod.rs --out Xml
+        cargo tarpaulin --exclude-files wasm parser/mod.rs --out Xml
         bash <(curl -s https://codecov.io/bash)
     - rust: stable
       os: osx

clippy.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -e
+
+cargo clean
+cargo clippy -- -D warnings
+cargo build --verbose --all
+cargo clippy --all-targets --all-features -- -D warnings -A clippy::cognitive_complexity
+cargo test --verbose --all
+cd wasm && cargo clippy -- -D warnings -A clippy::suspicious_else_formatting
+cd ../

src/select/mod.rs

@@ -710,18 +710,38 @@ impl<'a, 'b> Selector<'a, 'b> {
     }
 
     fn next_from_current_with_num(&mut self, index: f64) {
-        if let Some(current) = self.current.take() {
+        fn _collect<'a>(tmp: &mut Vec<&'a Value>, vec: &'a [Value], index: f64) {
-            let mut tmp = Vec::new();
-            for c in current {
-                if let Value::Array(vec) = c {
             let index = abs_index(index as isize, vec.len());
-                    if let Some(v) = c.get(index) {
+            if let Some(v) = vec.get(index) {
                 tmp.push(v);
             }
         }
+
+        if let Some(current) = self.current.take() {
+            let mut tmp = Vec::new();
+            for c in current {
+                match c {
+                    Value::Object(map) => {
+                        for k in map.keys() {
+                            if let Some(Value::Array(vec)) = map.get(k) {
+                                _collect(&mut tmp, vec, index);
                             }
+                        }
+                    }
+                    Value::Array(vec) => {
+                        _collect(&mut tmp, vec, index);
+                    }
+                    _ => {}
+                }
+            }
+
+            if tmp.is_empty() {
+                self.terms.pop();
+                self.current = Some(vec![&Value::Null]);
+            } else {
                 self.current = Some(tmp);
             }
+        }
 
         debug!(
             "next_from_current_with_num : {:?}, {:?}",
@@ -729,27 +749,6 @@ impl<'a, 'b> Selector<'a, 'b> {
         );
     }
 
-    fn next_from_current_with_str(&mut self, keys: &[String]) {
-        if let Some(current) = self.current.take() {
-            let mut tmp = Vec::new();
-            for c in current {
-                if let Value::Object(map) = c {
-                    for key in keys {
-                        if let Some(v) = map.get(key) {
-                            tmp.push(v)
-                        }
-                    }
-                }
-            }
-            self.current = Some(tmp);
-        }
-
-        debug!(
-            "next_from_current_with_str : {:?}, {:?}",
-            keys, self.current
-        );
-    }
-
     fn next_all_from_current(&mut self) {
         if let Some(current) = self.current.take() {
             let mut tmp = Vec::new();
@@ -774,6 +773,32 @@ impl<'a, 'b> Selector<'a, 'b> {
         debug!("next_all_from_current : {:?}", self.current);
     }
 
+    fn next_from_current_with_str(&mut self, keys: &[String]) {
+        if let Some(current) = self.current.take() {
+            let mut tmp = Vec::new();
+            for c in current {
+                if let Value::Object(map) = c {
+                    for key in keys {
+                        if let Some(v) = map.get(key) {
+                            tmp.push(v)
+                        }
+                    }
+                }
+            }
+
+            if tmp.is_empty() {
+                self.current = Some(vec![&Value::Null]);
+            } else {
+                self.current = Some(tmp);
+            }
+        }
+
+        debug!(
+            "next_from_current_with_str : {:?}, {:?}",
+            keys, self.current
+        );
+    }
+
     fn all_from_current(&mut self) {
         if let Some(current) = self.current.take() {
             let mut tmp = Vec::new();

tests/array_filter.rs

@@ -0,0 +1,218 @@
+#[macro_use]
+extern crate serde_json;
+
+use common::{read_json, select_and_then_compare, setup};
+
+mod common;
+
+#[test]
+fn array_range_default() {
+    setup();
+
+    select_and_then_compare(
+        "$.school.friends[1, 2]",
+        read_json("./benchmark/data_obj.json"),
+        json!([
+            {"id": 1, "name": "Vincent Cannon" },
+            {"id": 2, "name": "Gray Berry"}
+        ]),
+    );
+}
+
+#[test]
+fn array_range_all() {
+    setup();
+
+    select_and_then_compare(
+        "$[ : ]",
+        json!(["first", "second"]),
+        json!(["first", "second"]),
+    );
+}
+
+#[test]
+fn array_range_step_all() {
+    setup();
+
+    select_and_then_compare(
+        "$[::]",
+        json!(["first", "second", "third", "forth", "fifth"]),
+        json!(["first", "second", "third", "forth", "fifth"]),
+    );
+}
+
+#[test]
+fn array_range_step_only_step_value() {
+    setup();
+
+    select_and_then_compare(
+        "$[::2]",
+        json!(["first", "second", "third", "forth", "fifth"]),
+        json!(["first", "third", "fifth"]),
+    );
+}
+
+#[test]
+fn array_range_step_only_start_index() {
+    setup();
+
+    select_and_then_compare(
+        "$[1::]",
+        json!(["first", "second", "third", "forth", "fifth"]),
+        json!(["second", "third", "forth", "fifth"]),
+    );
+}
+
+#[test]
+fn array_range_step_empty_step_value() {
+    setup();
+
+    select_and_then_compare(
+        "$[1:2:]",
+        json!(["first", "second", "third", "forth", "fifth"]),
+        json!(["second"]),
+    );
+}
+
+#[test]
+fn array_range_step_empty_end_index() {
+    setup();
+
+    select_and_then_compare(
+        "$[1::2]",
+        json!(["first", "second", "third", "forth", "fifth"]),
+        json!(["second", "forth"]),
+    );
+}
+
+#[test]
+fn array_range_step_by_1() {
+    setup();
+
+    select_and_then_compare(
+        "$[0:3:1]",
+        json!(["first", "second", "third", "forth", "fifth"]),
+        json!(["first", "second", "third"]),
+    );
+}
+
+#[test]
+fn array_range_step_by_2() {
+    setup();
+
+    select_and_then_compare(
+        "$[0:3:2]",
+        json!(["first", "second", "third", "forth", "fifth"]),
+        json!(["first", "third"]),
+    );
+}
+
+#[test]
+fn array_range_only_negative_index() {
+    setup();
+
+    select_and_then_compare(
+        "$[-4:]",
+        json!(["first", "second", "third"]),
+        json!(["first", "second", "third"]),
+    );
+}
+
+#[test]
+fn array_range_only_end_index() {
+    setup();
+
+    select_and_then_compare(
+        "$[:4]",
+        json!(["first", "second", "third"]),
+        json!(["first", "second", "third"]),
+    );
+}
+
+#[test]
+fn array_range_only_from_index() {
+    setup();
+
+    select_and_then_compare(
+        "$.school.friends[1: ]",
+        read_json("./benchmark/data_obj.json"),
+        json!([
+            {"id": 1, "name": "Vincent Cannon" },
+            {"id": 2, "name": "Gray Berry"}
+        ]),
+    );
+}
+
+#[test]
+fn array_range_only_nagative_end_index() {
+    setup();
+
+    select_and_then_compare(
+        "$.school.friends[:-2]",
+        read_json("./benchmark/data_obj.json"),
+        json!([
+            {"id": 0, "name": "Millicent Norman"}
+        ]),
+    );
+}
+
+#[test]
+fn array_index() {
+    setup();
+
+    select_and_then_compare(
+        "$..friends[2].name",
+        read_json("./benchmark/data_obj.json"),
+        json!(["Gray Berry", "Gray Berry"]),
+    );
+}
+
+#[test]
+fn array_all_index() {
+    setup();
+
+    select_and_then_compare(
+        "$..friends[*].name",
+        read_json("./benchmark/data_obj.json"),
+        json!([
+            "Vincent Cannon",
+            "Gray Berry",
+            "Millicent Norman",
+            "Vincent Cannon",
+            "Gray Berry"
+        ]),
+    );
+}
+
+#[test]
+fn array_all_and_then_key() {
+    setup();
+
+    select_and_then_compare(
+        "$['school']['friends'][*].['name']",
+        read_json("./benchmark/data_obj.json"),
+        json!(["Millicent Norman", "Vincent Cannon", "Gray Berry"]),
+    );
+}
+
+#[test]
+fn array_index_and_then_key() {
+    setup();
+
+    select_and_then_compare(
+        "$['school']['friends'][0].['name']",
+        read_json("./benchmark/data_obj.json"),
+        json!(["Millicent Norman"]),
+    );
+}
+
+#[test]
+fn array_multiple_key() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.["eyeColor", "name"]"#,
+        read_json("./benchmark/data_obj.json"),
+        json!(["blue", "Leonor Herman"]),
+    );
+}

tests/filter.rs

@@ -1,619 +1,10 @@
 #[macro_use]
 extern crate serde_json;
 
-use serde_json::Value;
-
 use common::{read_json, select_and_then_compare, setup};
 
 mod common;
 
-#[test]
-fn array() {
-    setup();
-
-    select_and_then_compare(
-        "$.school.friends[1, 2]",
-        read_json("./benchmark/data_obj.json"),
-        json!([
-            {"id": 1, "name": "Vincent Cannon" },
-            {"id": 2, "name": "Gray Berry"}
-        ]),
-    );
-
-    select_and_then_compare(
-        "$.school.friends[1: ]",
-        read_json("./benchmark/data_obj.json"),
-        json!([
-            {"id": 1, "name": "Vincent Cannon" },
-            {"id": 2, "name": "Gray Berry"}
-        ]),
-    );
-
-    select_and_then_compare(
-        "$.school.friends[:-2]",
-        read_json("./benchmark/data_obj.json"),
-        json!([
-            {"id": 0, "name": "Millicent Norman"}
-        ]),
-    );
-
-    select_and_then_compare(
-        "$..friends[2].name",
-        read_json("./benchmark/data_obj.json"),
-        json!(["Gray Berry", "Gray Berry"]),
-    );
-
-    select_and_then_compare(
-        "$..friends[*].name",
-        read_json("./benchmark/data_obj.json"),
-        json!([
-            "Vincent Cannon",
-            "Gray Berry",
-            "Millicent Norman",
-            "Vincent Cannon",
-            "Gray Berry"
-        ]),
-    );
-
-    select_and_then_compare(
-        "$['school']['friends'][*].['name']",
-        read_json("./benchmark/data_obj.json"),
-        json!(["Millicent Norman", "Vincent Cannon", "Gray Berry"]),
-    );
-
-    select_and_then_compare(
-        "$['school']['friends'][0].['name']",
-        read_json("./benchmark/data_obj.json"),
-        json!(["Millicent Norman"]),
-    );
-
-    select_and_then_compare(
-        r#"$.["eyeColor", "name"]"#,
-        read_json("./benchmark/data_obj.json"),
-        json!(["blue", "Leonor Herman"]),
-    );
-}
-
-#[test]
-fn return_type() {
-    setup();
-
-    select_and_then_compare(
-        "$.school",
-        read_json("./benchmark/data_obj.json"),
-        json!([{
-            "friends": [
-                {"id": 0, "name": "Millicent Norman"},
-                {"id": 1, "name": "Vincent Cannon" },
-                {"id": 2, "name": "Gray Berry"}
-            ]
-        }]),
-    );
-
-    select_and_then_compare(
-        "$.school[?(@.friends[0])]",
-        read_json("./benchmark/data_obj.json"),
-        json!([{
-            "friends": [
-                {"id": 0, "name": "Millicent Norman"},
-                {"id": 1, "name": "Vincent Cannon" },
-                {"id": 2, "name": "Gray Berry"}
-            ]
-        }]),
-    );
-
-    select_and_then_compare(
-        "$.school[?(@.friends[10])]",
-        read_json("./benchmark/data_obj.json"),
-        json!([{
-            "friends": [
-                {"id": 0, "name": "Millicent Norman"},
-                {"id": 1, "name": "Vincent Cannon" },
-                {"id": 2, "name": "Gray Berry"}
-            ]
-        }]),
-    );
-
-    select_and_then_compare(
-        "$.school[?(1==1)]",
-        read_json("./benchmark/data_obj.json"),
-        json!([{
-            "friends": [
-                {"id": 0, "name": "Millicent Norman"},
-                {"id": 1, "name": "Vincent Cannon" },
-                {"id": 2, "name": "Gray Berry"}
-            ]
-        }]),
-    );
-
-    select_and_then_compare(
-        "$.school.friends[?(1==1)]",
-        read_json("./benchmark/data_obj.json"),
-        json!([[
-            {"id": 0, "name": "Millicent Norman"},
-            {"id": 1, "name": "Vincent Cannon" },
-            {"id": 2, "name": "Gray Berry"}
-        ]]),
-    );
-}
-
-#[test]
-fn op_default() {
-    setup();
-
-    select_and_then_compare(
-        "$.school[?(@.friends == @.friends)]",
-        read_json("./benchmark/data_obj.json"),
-        json!([{
-            "friends": [
-                {"id": 0, "name": "Millicent Norman"},
-                {"id": 1, "name": "Vincent Cannon" },
-                {"id": 2, "name": "Gray Berry"}
-            ]
-        }]),
-    );
-
-    select_and_then_compare(
-        "$.friends[?(@.name)]",
-        read_json("./benchmark/data_obj.json"),
-        json!([
-            { "id" : 1, "name" : "Vincent Cannon" },
-            { "id" : 2, "name" : "Gray Berry" }
-        ]),
-    );
-
-    select_and_then_compare(
-        "$.friends[?(@.id >= 2)]",
-        read_json("./benchmark/data_obj.json"),
-        json!([
-            { "id" : 2, "name" : "Gray Berry" }
-        ]),
-    );
-
-    select_and_then_compare(
-        "$.friends[?(@.id >= 2 || @.id == 1)]",
-        read_json("./benchmark/data_obj.json"),
-        json!([
-            { "id" : 2, "name" : "Gray Berry" },
-            { "id" : 1, "name" : "Vincent Cannon" }
-        ]),
-    );
-
-    select_and_then_compare(
-        "$.friends[?( (@.id >= 2 || @.id == 1) && @.id == 0)]",
-        read_json("./benchmark/data_obj.json"),
-        json!([Value::Null]),
-    );
-
-    select_and_then_compare(
-        "$..friends[?(@.id == $.index)].id",
-        read_json("./benchmark/data_obj.json"),
-        json!([0, 0]),
-    );
-
-    select_and_then_compare(
-        "$..book[?($.store.bicycle.price < @.price)].price",
-        read_json("./benchmark/example.json"),
-        json!([22.99]),
-    );
-
-    select_and_then_compare(
-        "$..book[?( (@.price == 12.99 || @.category == 'reference') && @.price > 10)].price",
-        read_json("./benchmark/example.json"),
-        json!([12.99]),
-    );
-
-    select_and_then_compare(
-        "$..[?(@.age > 40)]",
-        json!([
-            { "name": "이름1", "age": 40, "phone": "+33 12341234" },
-            { "name": "이름2", "age": 42, "phone": "++44 12341234" }
-        ]),
-        json!([
-            { "name" : "이름2", "age" : 42, "phone" : "++44 12341234" }
-        ]),
-    );
-
-    select_and_then_compare(
-        "$..[?(@.age >= 30)]",
-        json!({
-            "school": {
-                "friends": [
-                    {"name": "친구1", "age": 20},
-                    {"name": "친구2", "age": 20}
-                ]
-            },
-            "friends": [
-                {"name": "친구3", "age": 30},
-                {"name": "친구4"}
-        ]}),
-        json!([
-            { "name" : "친구3", "age" : 30 }
-        ]),
-    );
-}
-
-#[test]
-fn op_number() {
-    setup();
-
-    select_and_then_compare("$.[?(@.a == 1)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
-    select_and_then_compare("$.[?(@.a != 2)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
-    select_and_then_compare("$.[?(@.a < 2)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
-    select_and_then_compare("$.[?(@.a <= 1)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
-    select_and_then_compare("$.[?(@.a > 0)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
-    select_and_then_compare("$.[?(@.a >= 0)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
-}
-
-#[test]
-fn op_string() {
-    setup();
-
-    select_and_then_compare(
-        r#"$.[?(@.a == "b")]"#,
-        json!({ "a": "b" }),
-        json!([{ "a": "b" }]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a != "c")]"#,
-        json!({ "a": "b" }),
-        json!([{ "a": "b" }]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a < "b")]"#,
-        json!({ "a": "b" }),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a <= "b")]"#,
-        json!({ "a": "b" }),
-        json!([{ "a": "b" }]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a > "b")]"#,
-        json!({ "a": "b" }),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a >= "b")]"#,
-        json!({ "a": "b" }),
-        json!([{ "a": "b" }]),
-    );
-}
-
-#[test]
-fn op_object() {
-    setup();
-
-    select_and_then_compare(
-        r#"$.[?(@.a == @.c)]"#,
-        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
-        json!([{"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a != @.c)]"#,
-        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a < @.c)]"#,
-        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a <= @.c)]"#,
-        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a > @.c)]"#,
-        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a >= @.c)]"#,
-        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
-        json!([Value::Null]),
-    );
-}
-
-#[test]
-fn op_complex() {
-    setup();
-
-    select_and_then_compare(
-        r#"$.[?(1 == @.a)]"#,
-        json!({ "a": { "b": 1 } }),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?("1" != @.a)]"#,
-        json!({ "a": { "b": 1 } }),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a <= 1)]"#,
-        json!({ "a": { "b": 1 } }),
-        json!([Value::Null]),
-    );
-    select_and_then_compare(
-        r#"$.[?(@.a > "1")]"#,
-        json!({ "a": { "b": 1 } }),
-        json!([Value::Null]),
-    );
-}
-
-#[test]
-fn op_compare() {
-    setup();
-
-    for path in [
-        r#"$[?("1" == 1)]"#,
-        r#"$[?(1 == "1")]"#,
-        r#"$[?(true == 1)]"#,
-        r#"$[?(@ == 1)]"#,
-    ]
-        .iter()
-    {
-        select_and_then_compare(path, json!({}), json!([Value::Null]));
-    }
-}
-
-#[test]
-fn example() {
-    setup();
-
-    select_and_then_compare(
-        r#"$.store.book[*].author"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            "Nigel Rees",
-            "Evelyn Waugh",
-            "Herman Melville",
-            "J. R. R. Tolkien"
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$..author"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            "Nigel Rees",
-            "Evelyn Waugh",
-            "Herman Melville",
-            "J. R. R. Tolkien"
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$.store.*"#,
-        read_json("./benchmark/example.json"),
-        json!([
-             [
-                {"category" : "reference", "author" : "Nigel Rees","title" : "Sayings of the Century", "price" : 8.95},
-                {"category" : "fiction", "author" : "Evelyn Waugh","title" : "Sword of Honour","price" : 12.99},
-                {"category" : "fiction", "author" : "Herman Melville","title" : "Moby Dick","isbn" : "0-553-21311-3","price" : 8.99},
-                {"category" : "fiction", "author" : "J. R. R. Tolkien","title" : "The Lord of the Rings","isbn" : "0-395-19395-8","price" : 22.99}
-            ],
-            {"color" : "red","price" : 19.95},
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$.store..price"#,
-        read_json("./benchmark/example.json"),
-        json!([8.95, 12.99, 8.99, 22.99, 19.95]),
-    );
-
-    select_and_then_compare(
-        r#"$..book[2]"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            {
-            "category" : "fiction",
-            "author" : "Herman Melville",
-            "title" : "Moby Dick",
-            "isbn" : "0-553-21311-3",
-            "price" : 8.99
-            }
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$..book[-2]"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            {
-                "category" : "fiction",
-                "author" : "Herman Melville",
-                "title" : "Moby Dick",
-                "isbn" : "0-553-21311-3",
-                "price" : 8.99
-            }
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$..book[0, 1]"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            {
-                "category" : "reference",
-                "author" : "Nigel Rees",
-                "title" : "Sayings of the Century",
-                "price" : 8.95
-            },
-            {
-                "category" : "fiction",
-                "author" : "Evelyn Waugh",
-                "title" : "Sword of Honour",
-                "price" : 12.99
-            }
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$..book[:2]"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            {
-                "category" : "reference",
-                "author" : "Nigel Rees",
-                "title" : "Sayings of the Century",
-                "price" : 8.95
-            },
-            {
-                "category" : "fiction",
-                "author" : "Evelyn Waugh",
-                "title" : "Sword of Honour",
-                "price" : 12.99
-            }
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$..book[2:]"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            {
-                "category" : "fiction",
-                "author" : "Herman Melville",
-                "title" : "Moby Dick",
-                "isbn" : "0-553-21311-3",
-                "price" : 8.99
-           },
-           {
-                "category" : "fiction",
-                "author" : "J. R. R. Tolkien",
-                "title" : "The Lord of the Rings",
-                "isbn" : "0-395-19395-8",
-                "price" : 22.99
-           }
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$..book[?(@.isbn)]"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            {
-                "category" : "fiction",
-                "author" : "Herman Melville",
-                "title" : "Moby Dick",
-                "isbn" : "0-553-21311-3",
-                "price" : 8.99
-           },
-           {
-                "category" : "fiction",
-                "author" : "J. R. R. Tolkien",
-                "title" : "The Lord of the Rings",
-                "isbn" : "0-395-19395-8",
-                "price" : 22.99
-           }
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$.store.book[?(@.price < 10)]"#,
-        read_json("./benchmark/example.json"),
-        json!([
-            {
-                "category" : "reference",
-                "author" : "Nigel Rees",
-                "title" : "Sayings of the Century",
-                "price" : 8.95
-           },
-           {
-                "category" : "fiction",
-                "author" : "Herman Melville",
-                "title" : "Moby Dick",
-                "isbn" : "0-553-21311-3",
-                "price" : 8.99
-           }
-        ]),
-    );
-
-    select_and_then_compare(
-        r#"$..*"#,
-        read_json("./benchmark/example.json"),
-        read_json("./benchmark/giveme_every_thing_result.json"),
-    );
-}
-
-#[test]
-fn filer_same_obj() {
-    setup();
-
-    select_and_then_compare(
-        r#"$..[?(@.a == 1)]"#,
-        json!({
-            "a": 1,
-            "b" : {"a": 1},
-            "c" : {"a": 1}
-        }),
-        json!([
-            {"a": 1},
-            {"a": 1}
-        ]),
-    );
-}
-
-#[test]
-fn range() {
-    setup();
-
-    select_and_then_compare(
-        "$[ : ]",
-        json!(["first", "second"]),
-        json!(["first", "second"]),
-    );
-    select_and_then_compare(
-        "$[::]",
-        json!(["first", "second", "third", "forth", "fifth"]),
-        json!(["first", "second", "third", "forth", "fifth"]),
-    );
-    select_and_then_compare(
-        "$[::2]",
-        json!(["first", "second", "third", "forth", "fifth"]),
-        json!(["first", "third", "fifth"]),
-    );
-    select_and_then_compare(
-        "$[1::]",
-        json!(["first", "second", "third", "forth", "fifth"]),
-        json!(["second", "third", "forth", "fifth"]),
-    );
-    select_and_then_compare(
-        "$[1:2:]",
-        json!(["first", "second", "third", "forth", "fifth"]),
-        json!(["second"]),
-    );
-    select_and_then_compare(
-        "$[1::2]",
-        json!(["first", "second", "third", "forth", "fifth"]),
-        json!(["second", "forth"]),
-    );
-    select_and_then_compare(
-        "$[0:3:1]",
-        json!(["first", "second", "third", "forth", "fifth"]),
-        json!(["first", "second", "third"]),
-    );
-    select_and_then_compare(
-        "$[0:3:2]",
-        json!(["first", "second", "third", "forth", "fifth"]),
-        json!(["first", "third"]),
-    );
-    select_and_then_compare(
-        "$[-4:]",
-        json!(["first", "second", "third"]),
-        json!(["first", "second", "third"]),
-    );
-    select_and_then_compare(
-        "$[:4]",
-        json!(["first", "second", "third"]),
-        json!(["first", "second", "third"]),
-    );
-}
-
 #[test]
 fn quote() {
     setup();
@@ -631,7 +22,7 @@ fn quote() {
 }
 
 #[test]
-fn all_filter() {
+fn filter_next_all() {
     setup();
 
     for path in &[r#"$.*"#, r#"$[*]"#] {
@@ -641,6 +32,11 @@ fn all_filter() {
             json!(["string", 42, { "key": "value" }, [0, 1]]),
         );
     }
+}
+
+#[test]
+fn filter_all() {
+    setup();
 
     for path in &[r#"$..*"#, r#"$..[*]"#] {
         select_and_then_compare(
@@ -649,6 +45,11 @@ fn all_filter() {
             json!([ "string", 42, { "key" : "value" }, [ 0, 1 ], "value", 0, 1 ]),
         );
     }
+}
+
+#[test]
+fn filter_array_next_all() {
+    setup();
 
     for path in &[r#"$.*.*"#, r#"$[*].*"#, r#"$.*[*]"#, r#"$[*][*]"#] {
         select_and_then_compare(
@@ -657,6 +58,11 @@ fn all_filter() {
             json!(["value", 0, 1]),
         );
     }
+}
+
+#[test]
+fn filter_all_complex() {
+    setup();
 
     for path in &[r#"$..friends.*"#, r#"$[*].friends.*"#] {
         select_and_then_compare(
@@ -675,8 +81,9 @@ fn all_filter() {
 }
 
 #[test]
-fn current_path() {
+fn filter_parent_with_matched_child() {
     setup();
+
     select_and_then_compare(
         "$.a[?(@.b.c == 1)]",
         json!({
@@ -694,6 +101,11 @@ fn current_path() {
            }
         ]),
     );
+}
+
+#[test]
+fn filter_parent_exist_child() {
+    setup();
 
     select_and_then_compare(
         "$.a[?(@.b.c)]",
@@ -715,7 +127,7 @@ fn current_path() {
 }
 
 #[test]
-fn bugs33() {
+fn bugs33_exist_in_all() {
     setup();
 
     select_and_then_compare(
@@ -738,6 +150,11 @@ fn bugs33() {
             }
         ]),
     );
+}
+
+#[test]
+fn bugs33_exist_left_in_all_with_and_condition() {
+    setup();
 
     select_and_then_compare(
         "$..[?(@.first && @.first.second)]",
@@ -759,6 +176,11 @@ fn bugs33() {
             }
         ]),
     );
+}
+
+#[test]
+fn bugs33_exist_right_in_all_with_and_condition() {
+    setup();
 
     select_and_then_compare(
         "$..[?(@.b.c.d && @.b)]",

tests/jsonpath_examples.rs

@@ -0,0 +1,242 @@
+#[macro_use]
+extern crate serde_json;
+
+use common::{read_json, select_and_then_compare, setup};
+
+mod common;
+
+#[test]
+fn example_authros_of_all_books() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.store.book[*].author"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            "Nigel Rees",
+            "Evelyn Waugh",
+            "Herman Melville",
+            "J. R. R. Tolkien"
+        ]),
+    );
+}
+
+#[test]
+fn all_authors() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..author"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            "Nigel Rees",
+            "Evelyn Waugh",
+            "Herman Melville",
+            "J. R. R. Tolkien"
+        ]),
+    );
+}
+
+#[test]
+fn all_things_both_books_and_bicycles() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.store.*"#,
+        read_json("./benchmark/example.json"),
+        json!([
+             [
+                {"category" : "reference", "author" : "Nigel Rees","title" : "Sayings of the Century", "price" : 8.95},
+                {"category" : "fiction", "author" : "Evelyn Waugh","title" : "Sword of Honour","price" : 12.99},
+                {"category" : "fiction", "author" : "Herman Melville","title" : "Moby Dick","isbn" : "0-553-21311-3","price" : 8.99},
+                {"category" : "fiction", "author" : "J. R. R. Tolkien","title" : "The Lord of the Rings","isbn" : "0-395-19395-8","price" : 22.99}
+            ],
+            {"color" : "red","price" : 19.95},
+        ]),
+    );
+}
+
+#[test]
+fn the_price_of_everything() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.store..price"#,
+        read_json("./benchmark/example.json"),
+        json!([8.95, 12.99, 8.99, 22.99, 19.95]),
+    );
+}
+
+#[test]
+fn the_third_book() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..book[2]"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            {
+            "category" : "fiction",
+            "author" : "Herman Melville",
+            "title" : "Moby Dick",
+            "isbn" : "0-553-21311-3",
+            "price" : 8.99
+            }
+        ]),
+    );
+}
+
+#[test]
+fn the_second_to_last_book() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..book[-2]"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            {
+                "category" : "fiction",
+                "author" : "Herman Melville",
+                "title" : "Moby Dick",
+                "isbn" : "0-553-21311-3",
+                "price" : 8.99
+            }
+        ]),
+    );
+}
+
+#[test]
+fn the_first_two_books() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..book[0, 1]"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            {
+                "category" : "reference",
+                "author" : "Nigel Rees",
+                "title" : "Sayings of the Century",
+                "price" : 8.95
+            },
+            {
+                "category" : "fiction",
+                "author" : "Evelyn Waugh",
+                "title" : "Sword of Honour",
+                "price" : 12.99
+            }
+        ]),
+    );
+}
+
+#[test]
+fn all_books_from_index_0_inclusive_until_index_2_exclusive() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..book[:2]"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            {
+                "category" : "reference",
+                "author" : "Nigel Rees",
+                "title" : "Sayings of the Century",
+                "price" : 8.95
+            },
+            {
+                "category" : "fiction",
+                "author" : "Evelyn Waugh",
+                "title" : "Sword of Honour",
+                "price" : 12.99
+            }
+        ]),
+    );
+}
+
+#[test]
+fn all_books_from_index_1_inclusive_until_index_2_exclusive() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..book[2:]"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            {
+                "category" : "fiction",
+                "author" : "Herman Melville",
+                "title" : "Moby Dick",
+                "isbn" : "0-553-21311-3",
+                "price" : 8.99
+           },
+           {
+                "category" : "fiction",
+                "author" : "J. R. R. Tolkien",
+                "title" : "The Lord of the Rings",
+                "isbn" : "0-395-19395-8",
+                "price" : 22.99
+           }
+        ]),
+    );
+}
+
+#[test]
+fn all_books_with_an_isbn_number() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..book[?(@.isbn)]"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            {
+                "category" : "fiction",
+                "author" : "Herman Melville",
+                "title" : "Moby Dick",
+                "isbn" : "0-553-21311-3",
+                "price" : 8.99
+           },
+           {
+                "category" : "fiction",
+                "author" : "J. R. R. Tolkien",
+                "title" : "The Lord of the Rings",
+                "isbn" : "0-395-19395-8",
+                "price" : 22.99
+           }
+        ]),
+    );
+}
+
+#[test]
+fn all_books_in_store_cheaper_than_10() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.store.book[?(@.price < 10)]"#,
+        read_json("./benchmark/example.json"),
+        json!([
+            {
+                "category" : "reference",
+                "author" : "Nigel Rees",
+                "title" : "Sayings of the Century",
+                "price" : 8.95
+           },
+           {
+                "category" : "fiction",
+                "author" : "Herman Melville",
+                "title" : "Moby Dick",
+                "isbn" : "0-553-21311-3",
+                "price" : 8.99
+           }
+        ]),
+    );
+}
+
+#[test]
+fn give_me_every_thing() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..*"#,
+        read_json("./benchmark/example.json"),
+        read_json("./benchmark/giveme_every_thing_result.json"),
+    );
+}

tests/op.rs

@@ -0,0 +1,378 @@
+#[macro_use]
+extern crate serde_json;
+
+use serde_json::Value;
+
+use common::{read_json, select_and_then_compare, setup};
+
+mod common;
+
+#[test]
+fn op_object_eq() {
+    setup();
+
+    select_and_then_compare(
+        "$.school[?(@.friends == @.friends)]",
+        read_json("./benchmark/data_obj.json"),
+        json!([{
+            "friends": [
+                {"id": 0, "name": "Millicent Norman"},
+                {"id": 1, "name": "Vincent Cannon" },
+                {"id": 2, "name": "Gray Berry"}
+            ]
+        }]),
+    );
+}
+
+#[test]
+fn op_object_ge() {
+    setup();
+
+    select_and_then_compare(
+        "$.friends[?(@.id >= 2)]",
+        read_json("./benchmark/data_obj.json"),
+        json!([
+            { "id" : 2, "name" : "Gray Berry" }
+        ]),
+    );
+}
+
+#[test]
+fn op_object_or_default() {
+    setup();
+
+    select_and_then_compare(
+        "$.friends[?(@.id >= 2 || @.id == 1)]",
+        read_json("./benchmark/data_obj.json"),
+        json!([
+            { "id" : 2, "name" : "Gray Berry" },
+            { "id" : 1, "name" : "Vincent Cannon" }
+        ]),
+    );
+}
+
+#[test]
+fn op_object_and_or() {
+    setup();
+
+    select_and_then_compare(
+        "$.friends[?( (@.id >= 2 || @.id == 1) && @.id == 0)]",
+        read_json("./benchmark/data_obj.json"),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_result_type() {
+    setup();
+
+    select_and_then_compare(
+        "$..friends[?(@.id == $.index)].id",
+        read_json("./benchmark/data_obj.json"),
+        json!([0, 0]),
+    );
+}
+
+#[test]
+fn op_absolute_path_result_type() {
+    setup();
+
+    select_and_then_compare(
+        "$..book[?($.store.bicycle.price < @.price)].price",
+        read_json("./benchmark/example.json"),
+        json!([22.99]),
+    );
+}
+
+#[test]
+fn op_complicated() {
+    setup();
+
+    select_and_then_compare(
+        "$..book[?( (@.price == 12.99 || @.category == 'reference') && @.price > 10)].price",
+        read_json("./benchmark/example.json"),
+        json!([12.99]),
+    );
+}
+
+#[test]
+fn op_gt() {
+    setup();
+
+    select_and_then_compare(
+        "$..[?(@.age > 40)]",
+        json!([
+            { "name": "이름1", "age": 40, "phone": "+33 12341234" },
+            { "name": "이름2", "age": 42, "phone": "++44 12341234" }
+        ]),
+        json!([
+            { "name" : "이름2", "age" : 42, "phone" : "++44 12341234" }
+        ]),
+    );
+}
+
+#[test]
+fn op_ge() {
+    setup();
+
+    select_and_then_compare(
+        "$..[?(@.age >= 30)]",
+        json!({
+            "school": {
+                "friends": [
+                    {"name": "친구1", "age": 20},
+                    {"name": "친구2", "age": 20}
+                ]
+            },
+            "friends": [
+                {"name": "친구3", "age": 30},
+                {"name": "친구4"}
+        ]}),
+        json!([
+            { "name" : "친구3", "age" : 30 }
+        ]),
+    );
+}
+
+#[test]
+fn op_eq_for_number() {
+    setup();
+
+    select_and_then_compare("$.[?(@.a == 1)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
+}
+
+#[test]
+fn op_ne_for_number() {
+    setup();
+
+    select_and_then_compare("$.[?(@.a != 2)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
+}
+
+#[test]
+fn op_lt_for_number() {
+    setup();
+
+    select_and_then_compare("$.[?(@.a < 2)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
+}
+
+#[test]
+fn op_le_for_number() {
+    setup();
+
+    select_and_then_compare("$.[?(@.a <= 1)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
+}
+
+#[test]
+fn op_gt_for_number() {
+    setup();
+
+    select_and_then_compare("$.[?(@.a > 0)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
+}
+
+#[test]
+fn op_ge_for_number() {
+    setup();
+
+    select_and_then_compare("$.[?(@.a >= 0)]", json!({ "a": 1 }), json!([{ "a": 1 }]));
+}
+
+
+
+#[test]
+fn op_eq_for_string_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a == "b")]"#, json!({ "a": "b" }), json!([{ "a": "b" }]),
+    );
+}
+
+#[test]
+fn op_ne_for_string_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a != "c")]"#, json!({ "a": "b" }), json!([{ "a": "b" }]),
+    );
+
+}
+
+#[test]
+fn op_lt_for_string_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a < "b")]"#, json!({ "a": "b" }), json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_le_for_string_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a <= "b")]"#, json!({ "a": "b" }), json!([{ "a": "b" }]),
+    );
+}
+
+#[test]
+fn op_gt_for_string_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a > "b")]"#, json!({ "a": "b" }), json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_ge_for_string_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a >= "b")]"#, json!({ "a": "b" }), json!([{ "a": "b" }]),
+    );
+}
+
+#[test]
+fn op_eq_for_object_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a == @.c)]"#,
+        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
+        json!([{"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}]),
+    );
+}
+
+#[test]
+fn op_ne_for_object_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a != @.c)]"#,
+        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_lt_for_object_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a < @.c)]"#,
+        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_le_for_object_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a <= @.c)]"#,
+        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_gt_for_object_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a > @.c)]"#,
+        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_ge_for_object_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a >= @.c)]"#,
+        json!({"a": { "1": 1 }, "b": { "2": 2 }, "c": { "1": 1 }}),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_eq_for_complex_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(1 == @.a)]"#,
+        json!({ "a": { "b": 1 } }),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_ne_for_complex_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?("1" != @.a)]"#,
+        json!({ "a": { "b": 1 } }),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_le_for_complex_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a <= 1)]"#,
+        json!({ "a": { "b": 1 } }),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_gt_for_complex_value() {
+    setup();
+
+    select_and_then_compare(
+        r#"$.[?(@.a > "1")]"#,
+        json!({ "a": { "b": 1 } }),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn op_compare_different_types() {
+    setup();
+
+    for path in [
+        r#"$[?("1" == 1)]"#,
+        r#"$[?(1 == "1")]"#,
+        r#"$[?(true == 1)]"#,
+        r#"$[?(@ == 1)]"#,
+    ]
+        .iter()
+    {
+        select_and_then_compare(path, json!({}), json!([Value::Null]));
+    }
+}
+
+#[test]
+fn op_for_same_type() {
+    setup();
+
+    select_and_then_compare(
+        r#"$..[?(@.a == 1)]"#,
+        json!({
+            "a": 1,
+            "b" : {"a": 1},
+            "c" : {"a": 1}
+        }),
+        json!([
+            {"a": 1},
+            {"a": 1}
+        ]),
+    );
+}

tests/return_type.rs

@@ -0,0 +1,99 @@
+#[macro_use]
+extern crate serde_json;
+
+use serde_json::Value;
+
+use common::{read_json, select_and_then_compare, setup};
+
+mod common;
+
+#[test]
+fn return_type_for_single_object() {
+    setup();
+
+    select_and_then_compare(
+        "$.school",
+        read_json("./benchmark/data_obj.json"),
+        json!([{
+            "friends": [
+                {"id": 0, "name": "Millicent Norman"},
+                {"id": 1, "name": "Vincent Cannon" },
+                {"id": 2, "name": "Gray Berry"}
+            ]
+        }]),
+    );
+}
+
+#[test]
+fn return_type_for_single_object_key_matched() {
+    setup();
+
+    select_and_then_compare(
+        "$.friends[?(@.name)]",
+        read_json("./benchmark/data_obj.json"),
+        json!([
+            { "id" : 1, "name" : "Vincent Cannon" },
+            { "id" : 2, "name" : "Gray Berry" }
+        ]),
+    );
+}
+
+#[test]
+fn return_type_for_child_object_matched() {
+    setup();
+
+    select_and_then_compare(
+        "$.school[?(@.friends[0])]",
+        read_json("./benchmark/data_obj.json"),
+        json!([{
+            "friends": [
+                {"id": 0, "name": "Millicent Norman"},
+                {"id": 1, "name": "Vincent Cannon" },
+                {"id": 2, "name": "Gray Berry"}
+            ]
+        }]),
+    );
+}
+
+#[test]
+fn return_type_for_child_object_not_matched() {
+    setup();
+
+    select_and_then_compare(
+        "$.school[?(@.friends[10])]",
+        read_json("./benchmark/data_obj.json"),
+        json!([Value::Null]),
+    );
+}
+
+#[test]
+fn return_type_for_object_filter_true() {
+    setup();
+
+    select_and_then_compare(
+        "$.school[?(1==1)]",
+        read_json("./benchmark/data_obj.json"),
+        json!([{
+            "friends": [
+                {"id": 0, "name": "Millicent Norman"},
+                {"id": 1, "name": "Vincent Cannon" },
+                {"id": 2, "name": "Gray Berry"}
+            ]
+        }]),
+    );
+}
+
+#[test]
+fn return_type_for_array_filter_true() {
+    setup();
+
+    select_and_then_compare(
+        "$.school.friends[?(1==1)]",
+        read_json("./benchmark/data_obj.json"),
+        json!([[
+            {"id": 0, "name": "Millicent Norman"},
+            {"id": 1, "name": "Vincent Cannon" },
+            {"id": 2, "name": "Gray Berry"}
+        ]]),
+    );
+}