update tests

src/features/Web3/components/Preview/Data.tsx

@@ -22,7 +22,7 @@ export function Data({
 
   const networkName = chains.filter(
     (chain) => chain.id === selectedToken?.chainId
-  )[0].name
+  )?.[0]?.name
 
   return (
     <table className={styles.table} aria-disabled={isDisabled}>

src/features/Web3/hooks/useFetchTokens/useFetchTokens.test.tsx

@@ -5,7 +5,8 @@ import { useFetchTokens } from './useFetchTokens'
 test('useFetchTokens does not fetch anything when no chain or address are present', async () => {
   vi.mock('wagmi', () => ({
     useChainId: () => undefined,
-    useAccount: () => ({ address: undefined })
+    useAccount: () => ({ address: undefined }),
+    useChains: () => [{ id: 1, name: 'mainnet' }]
   }))
 
   function TestComponent() {

test/__mocks__/wagmi/index.ts

@@ -35,6 +35,16 @@ export function useChainId() {
   return 1
 }
 
+export function useChains() {
+  return [mainnet]
+}
+
+export function useSwitchChain() {
+  return {
+    switchChain: vi.fn()
+  }
+}
+
 export function useAccount() {
   return {
     address: '0x0000000000000000000000000000000000000000',