lesson-12 testing

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Hi could anyone explain me how this test is written. I don't understand mentioned two lines which are -
await ourToken._mint(deployer, 100)
assert(false)}

Above lines are coming from this->

              it("user can not mint", async () => {
                 await ourToken._mint(deployer, 100)
                      assert(false)}
})

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@othaime-en Could you help me to understand this?

[othaime-en]

Let me look into it.

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@othaime-en Did you check it ser?

[othaime-en]

Sorry. I totally forgot about this. Checkout the answer by @krakxn below. It's a good one.

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@othaime-en AND please help me with this explanation as well because its going outta head. haha

[krakxn]

The entire test please

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ok thankyou very much.

[othaime-en]

I understand what we are doing here and What i don't understand the line. I mean how it's written and what its doing?

Okay in simple terms as @krakxn has explained, the line tries to call the _mint() function. However, in the general sense of the test, we are trying to make sure that a user can't just call the test. So technically, the test passes if the user can't call the function and mint the token. For the function declaration of _mint() we know it is internal meaning you can't call it directly as we are doing in the line await ourToken._mint(...) The function can only be called by other functions within the contract. From this definition, we know the line await ourToken._mint(...) is doomed to failure of everything with our contract works fine. That is why we are asserting it to false. Asserting to false means that the expected behaviour is the function call failing and when it fails, then our test has passed.

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@othaime-en await ourToken._mint(deployer, 100)
assert(false)}

I understand ourToken which is the contract is calling the .mint function. But I am wondering what its is doing? I mean It says (deployer,100) so what are these doing in there? what deployer is doing there with 100 number?

[othaime-en]

If you look at our contracts, ourToken.sol inherits the function _mint from ERC20. From ERC20 you can find the function declaration of _mint and it is supposed to take in two parameters function _mint(address account, uint256 amount). So in simple terms, for you to call the _mint function, you need to pass in two parameters, the account that the tokens will go to, and the amount of tokens to mint. And that is what deployer and 100 represent here. We are saying that we want to mint 100 tokens for the deployer account.

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Oh yeah! I get it all clear now. thankyou @othaime-en