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Add Test Coating to .transfer () Called with foundry
By embarking on a unit writing tests for your solidity code, it is essential to ensure that the tests are exhaustive and complete. In this article, we will study how to add a test cover to .transfer () using foundry.
Understanding .transfer () in foundry
In the casting transfer () is a method that allows to send tokens from one address to another. In order to write effective tests for .transfer ()" Called, it is essential to understand the flow of transactions and how they interact with the contract.
Here is an example of what happens when you calltransfer ():
Solidness
// Solitude code of the example
Pragma Solidity ^0.8,0;
MyContract {contract
Uint Public Mintprice; // Determine a variable for the price of mint
Functional Transfer (Recipient at Address, UINT Value) Public Payable {
// Call the recipient’s contract with the specified quantity and without gas costs
// (The magic is happening here)
}
Mint function () Public {
// Mint tokens for this address
// …
}
}
`
Writing a test cover for .transfer () called
To add a test cover to.transfer ()calls, you will need to follow these steps:
- Determine contract : Create a new contract in your casting project with the example "MyContrac".
- Write tests : Write separate test features to cover different scenarios:
* Test that an invalid address of the recipient raises an error (such as callingtransfer ()with a non -existent address).
* Test that a valid recipient address receives tokens successfully.
- Use theCall
feature: In your test features, use Call Call ‘Call to simulate So -Called.transfer (). This will allow you to check the flow of the transaction and make sure that it corresponds to the expected behavior.
Here is some sample code to start:
`Solidness
Pragma Solidity ^0.8,0;
MyContract {contract
Uint Public Mintprice; // Determine a variable for the price of mint
Functional Transfer (Recipient at Address, UINT Value) Public Payable {
// Call the recipient’s contract with the specified quantity and without gas costs
// (The magic is happening here)
// Returns an event to signal a success or error
Return of a call (recipient, “mycontract”, “transfer”, (msg.sender, quantity));
}
}
// test function 1: Invalid recipient address
TestinvalidRecipient () Public {
Invasant address = address (0);
Requires (! Foundry.isaddress (Invalidaddress), “Expected Invalid Address”);
Transfer (Invalidaddress, 100);
// Check that the error has been raised and the event has been issued
}
// test function 2: Valid recipient address
TestvalidRecipient () Public {
Address Validaddress = address (0x123456789abcdef);
Requires (Fundy.isaddress (Validaddress), “Expected Valid Address”);
Transfer (Validaddress, 100);
// Check that the transaction is successful and an event has been issued
}
// test function 3: Successful recipient address
Testsuccess function () public {
Address receiver = address (0x123456789abcdef);
Transfer (recipient, 100);
// Check that the tag has been successfully transferred
}
`
Following these steps and using the Foundry Call feature, you will be able to write an effective test cover on ‘.transfer (), called in your solidity contracts. Remember to always confirm the expected behavior of your tests to make sure they are reliable and accurate.
