To optimize unit tests using a « blacksmith » Ethereum
As a creator working with Ethereum projects, you probably encountered challenges of complex intellectual contracts, using the Forge unit test system. One common problem is that tests may fail when the expected behavior of the event is examined. This article will address several common traps and make recommendations to optimize your unit tests.
Forge unit test system
Ethereum’s Forge test environment is a virtual machine (VM), allowing contracts to carry out the same logic as Mainnet. VM expects the events that the contracts are disseminated and will use them to verify the correctness of the contract. To ensure that your tests are gone, it is necessary to understand how the « blacksmith » system works.
General questions
You may encounter the following questions by writing Forge units:
- Missing events expectations : In some cases, the events are not clearly defined in the contract source code or in the test setup. When this happens, your test will not trust the intended behavior.
- If this interface is missing a contract or improperly implemented, your tests may not pass.
- Insufficient verification of addictions : Testing a contract that depends on external services or libraries, make sure you try those addictions.
Units tests optimization using Forge
To solve these problems and write more reliable unit tests, follow the best practices:
1. Clearly define events
Make sure all events clearly define the contract source code or in the test setup. This ensures that Forge VM knows how to expect those events.
`Solidarity
Contract with MyContract {
Newevent event (byte data);
}
`
When writing tests of these events, check that they are correctly disseminated in the intended interfaces:
`Javascript
he (‘should spread newevent’, async () => {
CONST Contract = New MyContract ();
wait for the contract.Neweven (‘somedata’);
Expect (Contract.events.newevent) .Tohaveveved (1);
});
`
2. Test events management
When testing events, make sure that forge VM can correctly interpret and process those events. This includes the belief that the functions of the contract are managing the events as expected.
`Javascript
he (‘should spread newevent’, async () => {
CONST Contract = New MyContract ();
wait for the contract.Neweven (‘somedata’);
Expect (Contract.events.newevent) .Tohaveveved (1);
});
`
3. Test addiction
When trying contracts that depend on external services or libraries, make sure you try those addictions. This includes verification that addictions are properly initiated and used.
`Javascript
Contract with MyContract {
Functions Testlibryfunction () {
// Initiate the Library’s addictions here
}
}
he (‘should call the function of the library’, async () => {
CONST Contract = New MyContract ();
wait for the contract.estlibryfunction ();
Expect (Contract.events.libryfunction) .Tohaveceed (1);
});
`
4. Use Forge’s built -in test tools
The Forge Test System comes with several built -in tools that can help you write more effective and efficient tests:
* Events Test : The « events » tool allows the event managers to be indicated for the event events.
* Functions Testing : The « Function » tool allows you to test the functions of the contract, including their implementations.
`Javascript
he (‘should handle newevent’, async () => {
CONST Contract = New MyContract ();
wait for the contract.Neweven (‘somedata’);
Expect (contract.encent.newevent).
