jsonpath_lib 0.3.0

It is JsonPath engine written in Rust. it provide a similar API interface in Webassembly and Javascript too. - Webassembly Demo: https://freestrings.github.io/jsonpath
Documentation
#[macro_use]
extern crate serde_json;

use common::{read_json, select_and_then_compare, setup};

mod common;

#[test]
fn quote() {
    setup();

    select_and_then_compare(
        r#"$['single\'quote']"#,
        json!({"single'quote":"value"}),
        json!(["value"]),
    );
    select_and_then_compare(
        r#"$["double\"quote"]"#,
        json!({"double\"quote":"value"}),
        json!(["value"]),
    );
}

#[test]
fn filter_next_all() {
    setup();

    for path in &[r#"$.*"#, r#"$[*]"#] {
        select_and_then_compare(
            path,
            json!(["string", 42, { "key": "value" }, [0, 1]]),
            json!(["string", 42, { "key": "value" }, [0, 1]]),
        );
    }
}

#[test]
fn filter_all() {
    setup();

    for path in &[r#"$..*"#, r#"$..[*]"#] {
        select_and_then_compare(
            path,
            json!(["string", 42, { "key": "value" }, [0, 1]]),
            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(
            path,
            json!(["string", 42, { "key": "value" }, [0, 1]]),
            json!(["value", 0, 1]),
        );
    }
}

#[test]
fn filter_all_complex() {
    setup();

    for path in &[r#"$..friends.*"#, r#"$[*].friends.*"#] {
        select_and_then_compare(
            path,
            read_json("./benchmark/data_array.json"),
            json!([
               { "id" : 0, "name" : "Millicent Norman" },
               { "id" : 1, "name" : "Vincent Cannon" },
               { "id" : 2, "name" : "Gray Berry" },
               { "id" : 0, "name" : "Tillman Mckay" },
               { "id" : 1, "name" : "Rivera Berg" },
               { "id" : 2, "name" : "Rosetta Erickson" }
            ]),
        );
    }
}

#[test]
fn filter_parent_with_matched_child() {
    setup();

    select_and_then_compare(
        "$.a[?(@.b.c == 1)]",
        json!({
            "a": {
                "b": {
                    "c": 1
                }
            }
        }),
        json!([
           {
              "b" : {
                 "c" : 1
              }
           }
        ]),
    );
}

#[test]
fn filter_parent_exist_child() {
    setup();

    select_and_then_compare(
        "$.a[?(@.b.c)]",
        json!({
            "a": {
                "b": {
                    "c": 1
                }
            }
        }),
        json!([
           {
              "b" : {
                 "c" : 1
              }
           }
        ]),
    );
}

#[test]
fn filter_parent_paths() {
    setup();

    select_and_then_compare(
        "$[?(@.key.subKey == 'subKey2')]",
        json!([
            {"key": {"seq": 1, "subKey": "subKey1"}},
            {"key": {"seq": 2, "subKey": "subKey2"}},
            {"key": 42},
            {"some": "value"}
         ]),
        json!([{"key": {"seq": 2, "subKey": "subKey2"}}]),
    );
}

#[test]
fn bugs33_exist_in_all() {
    setup();

    select_and_then_compare(
        "$..[?(@.first.second)]",
        json!({
                "foo": {
                    "first": { "second": "value" }
                },
                "foo2": {
                    "first": {}
                },
                "foo3": {
                }
            }),
        json!([
            {
                "first": {
                    "second": "value"
                }
            }
        ]),
    );
}

#[test]
fn bugs33_exist_left_in_all_with_and_condition() {
    setup();

    select_and_then_compare(
        "$..[?(@.first && @.first.second)]",
        json!({
                "foo": {
                    "first": { "second": "value" }
                },
                "foo2": {
                    "first": {}
                },
                "foo3": {
                }
            }),
        json!([
            {
                "first": {
                    "second": "value"
                }
            }
        ]),
    );
}

#[test]
fn bugs33_exist_right_in_all_with_and_condition() {
    setup();

    select_and_then_compare(
        "$..[?(@.b.c.d && @.b)]",
        json!({
            "a": {
                "b": {
                    "c": {
                        "d" : {
                            "e" : 1
                        }
                    }
                }
            }
        }),
        json!([
           {
              "b" : {
                "c" : {
                   "d" : {
                      "e" : 1
                   }
                }
              }
           }
        ]),
    );
}

#[test]
fn bugs38_array_notation_in_filter() {
    setup();

    select_and_then_compare(
        "$[?(@['key']==42)]",
        json!([
            {"key": 0},
            {"key": 42},
            {"key": -1},
            {"key": 41},
            {"key": 43},
            {"key": 42.0001},
            {"key": 41.9999},
            {"key": 100},
            {"some": "value"}
         ]),
        json!([{"key": 42}]),
    );

    select_and_then_compare(
        "$[?(@['key'].subKey == 'subKey2')]",
        json!([
            {"key": {"seq": 1, "subKey": "subKey1"}},
            {"key": {"seq": 2, "subKey": "subKey2"}},
            {"key": 42},
            {"some": "value"}
         ]),
        json!([{"key": {"seq": 2, "subKey": "subKey2"}}]),
    );

    select_and_then_compare(
        "$[?(@['key']['subKey'] == 'subKey2')]",
        json!([
            {"key": {"seq": 1, "subKey": "subKey1"}},
            {"key": {"seq": 2, "subKey": "subKey2"}},
            {"key": 42},
            {"some": "value"}
         ]),
        json!([{"key": {"seq": 2, "subKey": "subKey2"}}]),
    );

    select_and_then_compare(
        "$..key[?(@['subKey'] == 'subKey2')]",
        json!([
            {"key": {"seq": 1, "subKey": "subKey1"}},
            {"key": {"seq": 2, "subKey": "subKey2"}},
            {"key": 42},
            {"some": "value"}
         ]),
        json!([{"seq": 2, "subKey": "subKey2"}]),
    );
}