lecture 7 : unit testing

[haris4121]

why are we calling PriceFeed with braces although it is not a function
i think it should have been ?
why is it so?

const response = await fundMe.PriceFeed

describe("constructor", async function() {
        it("sets the aggregator address correctly", async () => {
            const response = await fundMe.PriceFeed()
            assert.equal(response, mockV3Aggregator.address)
        })
    })

[pacelliv]

Hello @haris4121, that is possible because when you declare a variable as public, Solidity creates getter function for that variable.

It means this variable:

AggregatorV3Interface public PriceFeed;

Under the hood is equivalent to:

function getPriceFeed() public view returns (AggregatorV3Interface) {
      return PriceFeed;
}