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Creation of test functions for contract near-contract-standards #1229

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Creation of test functions for contract near-contract-standards #1229

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f64e05d
feat: creation of test function "test_transfer_ok" in fungible_token:…
fabrobles92 Aug 1, 2024
0070322
- Adding feature flag
fabrobles92 Aug 5, 2024
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3 changes: 3 additions & 0 deletions examples/fungible-token/ft/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -10,3 +10,6 @@ crate-type = ["cdylib"]
[dependencies]
near-sdk = { path = "../../../near-sdk" }
near-contract-standards = { path = "../../../near-contract-standards" }

[dev-dependencies]
near-contract-standards = { path = "../../../near-contract-standards", default-features = false, features = ["unit-testing"]}
27 changes: 27 additions & 0 deletions examples/fungible-token/ft/src/lib.rs
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Expand Up @@ -199,6 +199,33 @@ mod tests {
builder
}

#[test]
fn test_fungible_token_core() {
let mut context = get_context(accounts(2));
testing_env!(context.build());
let mut contract = Contract::new_default_meta(accounts(2).into(), TOTAL_SUPPLY.into());
testing_env!(context
.storage_usage(env::storage_usage())
.attached_deposit(contract.storage_balance_bounds().min.into())
.predecessor_account_id(accounts(1))
.build());
// Paying for account registration, aka storage deposit
contract.storage_deposit(None, None);

testing_env!(context
.storage_usage(env::storage_usage())
.attached_deposit(NearToken::from_yoctonear(1))
.predecessor_account_id(accounts(2))
.build());
near_contract_standards::fungible_token::core::tests::test(&mut contract);
}

#[test]
fn test_fungible_token_metadata() {
let mut contract = Contract::new_default_meta(accounts(2).into(), TOTAL_SUPPLY.into());
near_contract_standards::fungible_token::metadata::tests::test(&mut contract);
}

#[test]
fn test_new() {
let mut context = get_context(accounts(1));
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1 change: 1 addition & 0 deletions near-contract-standards/Cargo.toml
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Expand Up @@ -21,3 +21,4 @@ near-sdk = { path = "../near-sdk", default-features = false, features = ["unit-t
[features]
default = []
abi = ["near-sdk/abi"]
unit-testing = []
35 changes: 35 additions & 0 deletions near-contract-standards/src/fungible_token/core.rs
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Expand Up @@ -100,3 +100,38 @@ pub trait FungibleTokenCore {
/// Returns the balance of the account. If the account doesn't exist must returns `"0"`.
fn ft_balance_of(&self, account_id: AccountId) -> U128;
}

#[cfg(all(not(target_arch = "wasm32"), feature = "unit-testing"))]
pub mod tests {

use near_sdk::test_utils::accounts;

use super::*;

fn test_transfer_ok(contract: &mut impl FungibleTokenCore) {
assert_eq!(contract.ft_balance_of(accounts(2)), U128(1_000_000_000_000_000));
assert_eq!(contract.ft_balance_of(accounts(1)), U128(0));
let amount = contract.ft_total_supply().0 / 4;
contract.ft_transfer(accounts(1), amount.into(), None);
assert_eq!(contract.ft_balance_of(accounts(2)).0, contract.ft_total_supply().0 - amount);
assert_eq!(contract.ft_balance_of(accounts(1)).0, amount);
}

fn test_transfer_call_ok(contract: &mut impl FungibleTokenCore) {
let amount = contract.ft_total_supply().0 / 4;
let result = contract.ft_transfer_call(accounts(1), amount.into(), None, "".to_string());
match result {
PromiseOrValue::Promise(_promise) => {
println!("Handle promise here");
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@frol I am having a hard time here trying to get the data from the Promise, I read documentation on how to resolve promises, and they need a callback, the problem is that I dont know if I should make the call back function in here or where I am calling this function.

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You won't be able to read the content of _promise, instead, use near_sdk::test_utils::get_created_receipts

}
_ => panic!("Expected Promise variant"),
}
assert_eq!(contract.ft_balance_of(accounts(2)).0, contract.ft_total_supply().0 / 2);
assert_eq!(contract.ft_balance_of(accounts(1)).0, contract.ft_total_supply().0 / 2);
}

pub fn test(contract: &mut impl FungibleTokenCore) {
test_transfer_ok(contract);
test_transfer_call_ok(contract);
Comment on lines +134 to +135
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We also need negative tests, such as:

  1. Attempt to transfer more tokens that sender account has on its balance - should fail and balance remain the same for both accounts
  2. Attempt to transfer to a non-registered account - should fail since storage cost is not covered
  3. Attempt to transfer from a non-registered account

}
}
21 changes: 21 additions & 0 deletions near-contract-standards/src/fungible_token/metadata.rs
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Expand Up @@ -29,3 +29,24 @@ impl FungibleTokenMetadata {
}
}
}

#[cfg(all(not(target_arch = "wasm32"), feature = "unit-testing"))]
pub mod tests {
use super::FungibleTokenMetadataProvider;
use crate::fungible_token::metadata::FT_METADATA_SPEC;

fn ft_metadata_ok(contract: &mut impl FungibleTokenMetadataProvider) {
let metadata = contract.ft_metadata();
assert_eq!(metadata.spec, FT_METADATA_SPEC.to_string());
assert_eq!(metadata.name, "Example NEAR fungible token");
assert_eq!(metadata.symbol, "EXAMPLE".to_string());
assert_eq!(metadata.icon, Some("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 288 288'%3E%3Cg id='l' data-name='l'%3E%3Cpath d='M187.58,79.81l-30.1,44.69a3.2,3.2,0,0,0,4.75,4.2L191.86,103a1.2,1.2,0,0,1,2,.91v80.46a1.2,1.2,0,0,1-2.12.77L102.18,77.93A15.35,15.35,0,0,0,90.47,72.5H87.34A15.34,15.34,0,0,0,72,87.84V201.16A15.34,15.34,0,0,0,87.34,216.5h0a15.35,15.35,0,0,0,13.08-7.31l30.1-44.69a3.2,3.2,0,0,0-4.75-4.2L96.14,186a1.2,1.2,0,0,1-2-.91V104.61a1.2,1.2,0,0,1,2.12-.77l89.55,107.23a15.35,15.35,0,0,0,11.71,5.43h3.13A15.34,15.34,0,0,0,216,201.16V87.84A15.34,15.34,0,0,0,200.66,72.5h0A15.35,15.35,0,0,0,187.58,79.81Z'/%3E%3C/g%3E%3C/svg%3E".to_string()));
assert_eq!(metadata.reference, None);
assert_eq!(metadata.reference_hash, None);
assert_eq!(metadata.decimals, 24);
Comment on lines +40 to +46
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This test should only validate the structure and logic. The contract is not required to hold specific metadata values. In the case of metadata, we may just test that calling the method does not crash, so just calling it will be enough and the rest is handled by Rust (we already know that the contract implements FungibleTokenMetadataProvider, and as such we know that the returned value is standard-compliant.

}

pub fn test(contract: &mut impl FungibleTokenMetadataProvider) {
ft_metadata_ok(contract);
}
}