serde_valid 0.16.0-alpha

JSON Schema based validation tool using with serde.
Documentation 
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use serde_json::json;
use serde_valid::Validate;

#[test]
fn unique_items_vec_type() {
    #[derive(Validate)]
    struct TestStruct {
        #[validate(unique_items)]
        val: Vec<i32>,
    }

    let s = TestStruct {
        val: vec![1, 2, 3, 4],
    };
    assert!(s.validate().is_ok());
}

#[test]
fn unique_items_slice_type() {
    #[derive(Validate)]
    struct TestStruct {
        #[validate(unique_items)]
        val: [i32; 4],
    }

    let s = TestStruct { val: [1, 2, 3, 4] };
    assert!(s.validate().is_ok());
}

#[test]
fn unique_items_is_err() {
    #[derive(Validate)]
    struct TestStruct {
        #[validate(unique_items)]
        val: Vec<i32>,
    }

    let s = TestStruct { val: vec![1, 2, 2] };
    assert!(s.validate().is_err());
}

#[test]
fn unique_items_err_message() {
    #[derive(Validate)]
    struct TestStruct {
        #[validate(unique_items)]
        val: Vec<i32>,
    }

    let s = TestStruct {
        val: vec![1, 2, 3, 2],
    };

    assert_eq!(
        s.validate().unwrap_err().to_string(),
        json!({
            "errors": [],
            "properties": {
                "val": {
                    "errors": [
                    "The items must be unique."
                    ]
                }
            }
        })
        .to_string()
    );
}

#[test]
fn unique_items_custom_err_message_fn() {
    fn error_message(_params: &serde_valid::UniqueItemsError) -> String {
        "this is custom message.".to_string()
    }

    #[derive(Validate)]
    struct TestStruct {
        #[validate(unique_items, message_fn(error_message))]
        val: Vec<i32>,
    }

    let s = TestStruct {
        val: vec![1, 2, 3, 2],
    };

    assert_eq!(
        s.validate().unwrap_err().to_string(),
        json!({
            "errors": [],
            "properties": {
                "val": {
                    "errors": [
                        "this is custom message."
                    ]
                }
            }
        })
        .to_string()
    );
}

#[test]
fn unique_items_custom_err_message() {
    #[derive(Validate)]
    struct TestStruct {
        #[validate(unique_items, message = "this is custom message.")]
        val: Vec<i32>,
    }

    let s = TestStruct {
        val: vec![1, 2, 3, 2],
    };

    assert_eq!(
        s.validate().unwrap_err().to_string(),
        json!({
            "errors": [],
            "properties": {
                "val": {
                    "errors": [
                        "this is custom message."
                    ]
                }
            }
        })
        .to_string()
    );
}