Testing locally with uniswap pair failing

Smart Contracts
1

Hi,

How do I test locally with ganache-cli when using a uniswap pair?

IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
         // Create a uniswap pair for this new token
        address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());

My code fails to create a uniswapV2Pair when testing on a local network or infura

2
  1. what is address(this)?
  2. don't forget to give allowance to the router contract for your tokens and weth.
3

There is no Uniwap Router at this address in your local Ganache instance.

For testing integration with Uniswap V2 check out their guide:

https://docs.uniswap.org/protocol/V2/guides/smart-contract-integration/quick-start