lib.rs 1.72 KB
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// Copyright 2018-2020 Parity Technologies (UK) Ltd.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//     http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#![cfg_attr(not(feature = "std"), no_std)]

use ink_lang as ink;
#[ink::contract]
mod incrementer {
    #[ink(storage)]
    pub struct Incrementer {
    }

    impl Incrementer {
        #[ink(constructor)]
        pub fn new(init_value: i32) -> Self {
            Self { value: init_value }
        }

        #[ink(constructor)]
        pub fn default() -> Self {
            Self::new(Default::default())
        }

        #[ink(message)]
        pub fn inc(&mut self, by: i32) {
            self.value += by;
        }

        #[ink(message)]
        pub fn get(&self) -> i32 {
        }
    }

    #[cfg(test)]
    mod tests {
        use super::*;

        #[test]
        fn default_works() {
            let contract = Incrementer::default();
            assert_eq!(contract.get(), 0);
        }

        #[test]
        fn it_works() {
            let mut contract = Incrementer::new(42);
            assert_eq!(contract.get(), 42);
            contract.inc(5);
            assert_eq!(contract.get(), 47);
            contract.inc(-50);
            assert_eq!(contract.get(), -3);
        }
    }
}