yason 0.0.2

Encoding and decoding support for YASON in Rust
Documentation 
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//! Object builder tests.

use yason::{BuildError, DataType, Number, ObjectBuilder, ObjectRefBuilder, Value, Yason, YasonBuf};

fn assert_string<T: AsRef<str>>(input: Value, expected: T) {
    if let Value::String(value) = input {
        assert_eq!(value, expected.as_ref());
    } else {
        panic!("type inconsistency");
    };
}

fn assert_number(input: Value, expected: Number) {
    if let Value::Number(value) = input {
        assert_eq!(value, expected);
    } else {
        panic!("type inconsistency");
    };
}

fn assert_bool(input: Value, expected: bool) {
    if let Value::Bool(value) = input {
        assert_eq!(value, expected);
    } else {
        panic!("type inconsistency");
    };
}

fn assert_null(input: Value) {
    let res = matches!(input, Value::Null);
    assert!(res);
}

fn assert_object(yason: &Yason) {
    let object = yason.object().unwrap();
    assert_eq!(object.len().unwrap(), 6);
    assert!(!object.is_empty().unwrap());
    assert_eq!(object.type_of("id").unwrap().unwrap(), DataType::Number);
    assert!(object.is_type("name", DataType::String).unwrap().unwrap());
    assert!(object.contains_key("child").unwrap());

    assert_number(object.get("id").unwrap().unwrap(), Number::from(1));
    assert_string(object.get("name").unwrap().unwrap(), "abc");
    assert_bool(object.get("child").unwrap().unwrap(), false);
    assert_null(object.get("phone").unwrap().unwrap());
    assert_eq!(object.get("array").unwrap().unwrap().data_type(), DataType::Array);
    assert_eq!(object.get("object").unwrap().unwrap().data_type(), DataType::Object);

    assert_eq!(object.number("id").unwrap().unwrap(), Number::from(1));
    assert_eq!(object.string("name").unwrap().unwrap(), "abc");
    assert!(!object.bool("child").unwrap().unwrap());
    assert!(object.is_null("phone").unwrap().unwrap());
    assert_eq!(object.array("array").unwrap().unwrap().len().unwrap(), 1);
    assert_eq!(object.object("object").unwrap().unwrap().len().unwrap(), 1);

    assert!(object.bool("id").is_err());

    let value = object.get("invalid").unwrap();
    assert!(value.is_none());

    // tests iter
    for (id, item) in object.iter().unwrap().enumerate() {
        let (key, value) = item.unwrap();
        if id == 0 {
            assert_eq!(key, "id");
            assert_number(value, Number::from(1));
        } else if id == 1 {
            assert_eq!(key, "name");
            assert_string(value, "abc");
        } else if id == 2 {
            assert_eq!(key, "array");
            assert_eq!(value.data_type(), DataType::Array);
        } else if id == 3 {
            assert_eq!(key, "child");
            assert_bool(value, false);
        } else if id == 4 {
            assert_eq!(key, "phone");
            assert_null(value);
        } else if id == 5 {
            assert_eq!(key, "object");
            assert_eq!(value.data_type(), DataType::Object);
        }
    }

    // tests key iter
    for (id, key) in object.key_iter().unwrap().enumerate() {
        let key = key.unwrap();
        if id == 0 {
            assert_eq!(key, "id");
        } else if id == 1 {
            assert_eq!(key, "name");
        } else if id == 2 {
            assert_eq!(key, "array");
        } else if id == 3 {
            assert_eq!(key, "child");
        } else if id == 4 {
            assert_eq!(key, "phone");
        } else if id == 5 {
            assert_eq!(key, "object");
        }
    }

    // tests value iter
    for (id, value) in object.value_iter().unwrap().enumerate() {
        let value = value.unwrap();
        if id == 0 {
            assert_number(value, Number::from(1));
        } else if id == 1 {
            assert_string(value, "abc");
        } else if id == 2 {
            assert_eq!(value.data_type(), DataType::Array);
        } else if id == 3 {
            assert_bool(value, false);
        } else if id == 4 {
            assert_null(value);
        } else if id == 5 {
            assert_eq!(value.data_type(), DataType::Object);
        }
    }
}

fn create_yason() -> YasonBuf {
    // {"id": 1, "name": "abc", "child": false, "phone": null, "array": [true], "object": {"key": true} }}
    let mut builder = ObjectBuilder::try_new(6, false).unwrap();
    builder.push_number("id", Number::from(1)).unwrap();
    builder.push_string("name", "abc").unwrap();
    builder.push_bool("child", false).unwrap();
    builder.push_null("phone").unwrap();

    let mut array_builder = builder.push_array("array", 1).unwrap();
    array_builder.push_bool(true).unwrap();
    array_builder.finish().unwrap();

    let mut object_builder = builder.push_object("object", 1, true).unwrap();
    object_builder.push_bool("key", true).unwrap();
    object_builder.finish().unwrap();

    builder.finish().unwrap()
}

fn create_yason_with_vec(bytes: &mut Vec<u8>) -> &Yason {
    let mut builder = ObjectRefBuilder::try_new(bytes, 6, false).unwrap();
    builder.push_number("id", Number::from(1)).unwrap();
    builder.push_string("name", "abc").unwrap();
    builder.push_bool("child", false).unwrap();
    builder.push_null("phone").unwrap();

    let mut array_builder = builder.push_array("array", 1).unwrap();
    array_builder.push_bool(true).unwrap();
    array_builder.finish().unwrap();

    let mut object_builder = builder.push_object("object", 1, true).unwrap();
    object_builder.push_bool("key", true).unwrap();
    object_builder.finish().unwrap();

    builder.finish().unwrap()
}

#[test]
fn test_object() {
    let yason = create_yason();
    assert_eq!(yason.data_type().unwrap(), DataType::Object);
    assert_object(yason.as_ref());
}

#[test]
fn test_object_from_vec() {
    let mut bytes = Vec::with_capacity(128);
    let yason = create_yason_with_vec(&mut bytes);
    assert_eq!(yason.data_type().unwrap(), DataType::Object);
    assert_object(yason)
}

#[test]
fn test_object_from_used_vec() {
    let mut bytes = Vec::with_capacity(128);
    bytes.push(1u8);
    bytes.push(2u8);
    bytes.push(3u8);
    bytes.push(4u8);

    let yason = create_yason_with_vec(&mut bytes);
    assert_eq!(yason.data_type().unwrap(), DataType::Object);
    assert_object(yason)
}

#[test]
fn test_create_object_error() {
    let mut builder = ObjectBuilder::try_new(3, true).unwrap();
    builder.push_bool("key", true).unwrap();
    let res = builder.finish();
    assert!(res.is_err());

    let mut builder = ObjectBuilder::try_new(3, true).unwrap();
    let _ = builder.push_object("key", 3, true).unwrap();
    let res = builder.finish();
    assert!(res.is_err());
}

#[test]
fn test_object_finish_error() {
    let mut builder_level0 = ObjectBuilder::try_new(1, true).unwrap();
    let _ = builder_level0.push_object("key", 1, true).unwrap();
    let res = builder_level0.finish();
    assert!(matches!(res.err(), Some(BuildError::InnerUncompletedError)));

    let mut builder_level0 = ObjectBuilder::try_new(1, true).unwrap();
    let _ = builder_level0.push_object("key", 1, true).unwrap();
    let res = builder_level0.push_null("key");
    assert!(matches!(res.err(), Some(BuildError::InnerUncompletedError)));
}

#[test]
fn test_object_nested_depth() {
    fn assert_nested_depth(total_depth: usize, err: Option<BuildError>) {
        fn inner(
            builder: Result<&mut ObjectRefBuilder, BuildError>,
            cur_depth: usize,
            total_depth: usize,
        ) -> Option<BuildError> {
            if cur_depth < total_depth {
                let nested_builder = builder.unwrap().push_object("key", 1, true);
                return if cur_depth < 100 {
                    inner(Ok(&mut nested_builder.unwrap()), cur_depth + 1, total_depth)
                } else {
                    nested_builder.err()
                };
            }
            None
        }

        let mut bytes = vec![];
        let mut builder = ObjectRefBuilder::try_new(&mut bytes, 1, true).unwrap();
        let res = inner(Ok(&mut builder), 1, total_depth);

        if let Some(e) = err {
            assert!(matches!(e, BuildError::NestedTooDeeply));
        } else {
            assert!(res.is_none());
        }
    }

    assert_nested_depth(98, None);
    assert_nested_depth(99, None);
    assert_nested_depth(100, None);
    assert_nested_depth(101, Some(BuildError::NestedTooDeeply));
    assert_nested_depth(102, Some(BuildError::NestedTooDeeply));
}