V2 Cover unit tests: buyCover

[roxdanila]

buyCover

• should purchase new cover using 1 staking pool: 1000 ETH for 30 days, pay in ETH

• should purchase new cover using 2 staking pools: 1000 ETH for 30 days, pay in ETH

• should purchase new cover using NXM with commission: 1000 ETH for 30 days, pay in NXM

• should purchase new cover using DAI with commission: 1000 DAI for 30 days, pay in DAI

• should purchase new cover using USDC with commission: 1M USDC for 30 days, pay in USDC

• should revert for unavailable product

• should revert for unsupported payout asset

• should revert for period shorter than the minimum (28 days)

• should revert for period longer than the maximum (364 days)

• should revert for commission rate too high (25%)

• should revert when cover amount is 0

• Should revert if system is paused

• Should revert if caller is not member

• Should revert if reentrant (Is reentrant protection needed?)

• Should revert if owner is address zero

• Should revert if productId is not valid

• Should revert if product is not initialized

• Should revert if payout asset is not supported by the product

• Should revert if amount is 0

• Should revert if period is not within allowed bounds

• Should revert if commission ratio is bigger than max value

• Should revert if paymentAsset is not supported

• Should revert if paymentAsset is deprecated

• Should revert if calculated premium is bigger than maxPremiumInAsset

• Should revert if empty array of allocationRequests?

• Should revert if pools out of capacity

• Should retrieve payment in ERC20 paymentAsset from caller

• Should allow to pay with NXM

• Should allow to pay with ETH

• Should allow to pay with DAI

• Should pay correct commission to commissionDestination

• Should store cover data

• Should mint NFT to owner

• Should emit CoverBought event

• Should work if owner is not a member

• Should correctly calculate premium

• Should correctly allocate capacity to pools

• Should allow to buy against multiple staking pools (Is there a max amount of pools that should be considered?)

• Should correctly mint rewards to pools

• Should correctly create segments