Add E2E tests for Mapping functions

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 - Add E2E testing framework MVP ‒ [#1395](https://github.com/paritytech/ink/pull/1395)
+- Add E2E tests for `Mapping` functions - [#1492](https://github.com/paritytech/ink/pull/1492)
 
 ## Version 4.0.0-beta
 

examples/mapping_integration_tests/.gitignore

@@ -0,0 +1,9 @@
+# Ignore build artifacts from the local tests sub-crate.
+/target/
+
+# Ignore backup files creates by cargo fmt.
+**/*.rs.bk
+
+# Remove Cargo.lock when creating an executable, leave it for libraries
+# More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock
+Cargo.lock

examples/mapping_integration_tests/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "mapping-integration-tests"
+version = "4.0.0-beta"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2021"
+publish = false
+
+[dependencies]
+ink = { path = "../../crates/ink", default-features = false }
+
+scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
+scale-info = { version = "2.3", default-features = false, features = ["derive"], optional = true }
+
+[dev-dependencies]
+ink_e2e = { path = "../../crates/e2e" }
+
+[lib]
+name = "mapping_integration_tests"
+path = "lib.rs"
+crate-type = [
+	# Used for normal contract Wasm blobs.
+	"cdylib",
+]
+
+[features]
+default = ["std"]
+std = [
+    "ink/std",
+    "scale/std",
+    "scale-info/std",
+]
+ink-as-dependency = []
+e2e-tests = []

examples/mapping_integration_tests/lib.rs

@@ -0,0 +1,345 @@
+//! A smart contract which demonstrates functionality of `Mapping` functions.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[ink::contract]
+mod mapping_integration_tests {
+    use ink::storage::Mapping;
+
+    /// A contract for testing `Mapping` functionality.
+    #[ink(storage)]
+    #[derive(Default)]
+    pub struct Mappings {
+        /// Mapping from owner to number of owned token.
+        balances: Mapping<AccountId, Balance>,
+    }
+
+    impl Mappings {
+        /// Demonstrates the usage of `Mappings::default()`
+        ///
+        /// Creates an empty mapping between accounts and balances.
+        #[ink(constructor)]
+        pub fn new() -> Self {
+            let balances = Mapping::default();
+            Self { balances }
+        }
+
+        /// Demonstrates the usage of `Mapping::get()`.
+        ///
+        /// Returns the balance of a account, or `None` if the account is not in the `Mapping`.
+        #[ink(message)]
+        pub fn get_balance(&self) -> Option<Balance> {
+            let caller = Self::env().caller();
+            self.balances.get(caller)
+        }
+
+        /// Demonstrates the usage of `Mappings::insert()`.
+        ///
+        /// Assigns the value to a given account.
+        ///
+        /// Returns the size of the pre-existing balance at the specified key if any.
+        /// Returns `None` if the account was not previously in the `Mapping`.
+        #[ink(message)]
+        pub fn insert_balance(&mut self, value: Balance) -> Option<u32> {
+            let caller = Self::env().caller();
+            self.balances.insert(caller, &value)
+        }
+
+        /// Demonstrates the usage of `Mappings::size()`.
+        ///
+        /// Returns the size of the pre-existing balance at the specified key if any.
+        /// Returns `None` if the account was not previously in the `Mapping`.
+        #[ink(message)]
+        pub fn size_balance(&mut self) -> Option<u32> {
+            let caller = Self::env().caller();
+            self.balances.size(caller)
+        }
+
+        /// Demonstrates the usage of `Mapping::contains()`.
+        ///
+        /// Returns `true` if the account has any balance assigned to it.
+        #[ink(message)]
+        pub fn contains_balance(&self) -> bool {
+            let caller = Self::env().caller();
+            self.balances.contains(caller)
+        }
+
+        /// Demonstrates the usage of `Mappings::remove()`.
+        ///
+        /// Removes the balance entry for a given account.
+        #[ink(message)]
+        pub fn remove_balance(&mut self) {
+            let caller = Self::env().caller();
+            self.balances.remove(caller);
+        }
+
+        /// Demonstrates the usage of `Mappings::take()`.
+        ///
+        /// Returns the balance of a given account removing it from storage.
+        ///
+        /// Returns `None` if the account is not in the `Mapping`.
+        #[ink(message)]
+        pub fn take_balance(&mut self) -> Option<Balance> {
+            let caller = Self::env().caller();
+            self.balances.take(caller)
+        }
+    }
+
+    #[cfg(all(test, feature = "e2e-tests"))]
+    mod e2e_tests {
+        use super::*;
+        type E2EResult<T> = std::result::Result<T, Box<dyn std::error::Error>>;
+
+        #[ink_e2e::test]
+        async fn insert_and_get_works(
+            mut client: ink_e2e::Client<C, E>,
+        ) -> E2EResult<()> {
+            // given
+            let constructor = MappingsRef::new();
+            let contract_id = client
+                .instantiate(
+                    "mapping-integration-tests",
+                    &ink_e2e::alice(),
+                    constructor,
+                    0,
+                    None,
+                )
+                .await
+                .expect("instantiate failed")
+                .account_id;
+
+            // when
+            let insert = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.insert_balance(1_000));
+            let size = client
+                .call(&ink_e2e::alice(), insert, 0, None)
+                .await
+                .expect("Calling `insert_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            // then
+            let get = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.get_balance());
+            let balance = client
+                .call(&ink_e2e::alice(), get, 0, None)
+                .await
+                .expect("Calling `get_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            assert!(size.is_none());
+            assert_eq!(balance, Some(1_000));
+
+            Ok(())
+        }
+
+        #[ink_e2e::test]
+        async fn insert_and_contains_works(
+            mut client: ink_e2e::Client<C, E>,
+        ) -> E2EResult<()> {
+            // given
+            let constructor = MappingsRef::new();
+            let contract_id = client
+                .instantiate(
+                    "mapping-integration-tests",
+                    &ink_e2e::bob(),
+                    constructor,
+                    0,
+                    None,
+                )
+                .await
+                .expect("instantiate failed")
+                .account_id;
+
+            // when
+            let insert = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.insert_balance(1_000));
+            let _ = client
+                .call(&ink_e2e::bob(), insert, 0, None)
+                .await
+                .expect("Calling `insert_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.");
+
+            // then
+            let contains = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.contains_balance());
+            let is_there = client
+                .call(&ink_e2e::bob(), contains, 0, None)
+                .await
+                .expect("Calling `contains_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            assert!(is_there);
+
+            Ok(())
+        }
+
+        #[ink_e2e::test]
+        async fn reinsert_works(mut client: ink_e2e::Client<C, E>) -> E2EResult<()> {
+            // given
+            let constructor = MappingsRef::new();
+            let contract_id = client
+                .instantiate(
+                    "mapping-integration-tests",
+                    &ink_e2e::charlie(),
+                    constructor,
+                    0,
+                    None,
+                )
+                .await
+                .expect("instantiate failed")
+                .account_id;
+
+            // when
+            let first_insert = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.insert_balance(1_000));
+            let _ = client
+                .call(&ink_e2e::charlie(), first_insert, 0, None)
+                .await
+                .expect("Calling `insert_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.");
+
+            let insert = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.insert_balance(10_000));
+            let size = client
+                .call(&ink_e2e::charlie(), insert, 0, None)
+                .await
+                .expect("Calling `insert_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            // then
+            assert!(size.is_some());
+
+            let get = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.get_balance());
+            let balance = client
+                .call(&ink_e2e::charlie(), get, 0, None)
+                .await
+                .expect("Calling `get_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            assert_eq!(balance, Some(10_000));
+
+            Ok(())
+        }
+
+        #[ink_e2e::test]
+        async fn insert_and_remove_works(
+            mut client: ink_e2e::Client<C, E>,
+        ) -> E2EResult<()> {
+            // given
+            let constructor = MappingsRef::new();
+            let contract_id = client
+                .instantiate(
+                    "mapping-integration-tests",
+                    &ink_e2e::dave(),
+                    constructor,
+                    0,
+                    None,
+                )
+                .await
+                .expect("instantiate failed")
+                .account_id;
+
+            // when
+            let insert = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.insert_balance(3_000));
+            let _ = client
+                .call(&ink_e2e::dave(), insert, 0, None)
+                .await
+                .expect("Calling `insert_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            let remove = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.remove_balance());
+            let _ = client
+                .call(&ink_e2e::dave(), remove, 0, None)
+                .await
+                .expect("Calling `remove_balance` failed");
+
+            // then
+            let get = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.get_balance());
+            let balance = client
+                .call(&ink_e2e::dave(), get, 0, None)
+                .await
+                .expect("Calling `get_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            assert_eq!(balance, None);
+
+            Ok(())
+        }
+
+        #[ink_e2e::test]
+        async fn insert_and_take_works(
+            mut client: ink_e2e::Client<C, E>,
+        ) -> E2EResult<()> {
+            // given
+            let constructor = MappingsRef::new();
+            let contract_id = client
+                .instantiate(
+                    "mapping-integration-tests",
+                    &ink_e2e::eve(),
+                    constructor,
+                    0,
+                    None,
+                )
+                .await
+                .expect("instantiate failed")
+                .account_id;
+
+            // when
+            let insert = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.insert_balance(4_000));
+            let _ = client
+                .call(&ink_e2e::eve(), insert, 0, None)
+                .await
+                .expect("Calling `insert_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.");
+
+            let take = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.take_balance());
+            let balance = client
+                .call(&ink_e2e::eve(), take, 0, None)
+                .await
+                .expect("Calling `take_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            // then
+            assert_eq!(balance, Some(4_000));
+
+            let contains = ink_e2e::build_message::<MappingsRef>(contract_id)
+                .call(|contract| contract.contains_balance());
+            let is_there = client
+                .call(&ink_e2e::eve(), contains, 0, None)
+                .await
+                .expect("Calling `contains_balance` failed")
+                .value
+                .expect("Input is valid, call must not fail.")
+                .expect("Execution should not fail.");
+
+            assert!(!is_there);
+
+            Ok(())
+        }
+    }
+}