test: add coverage for fetchTokenList('default') bundled token path

Test that the bundled @uniswap/default-token-list returns a non-empty
tokens array and that all EVM-addressable entries conform to tokenSchema.

The v18 list also includes Solana tokens (base58 addresses) which are
expected to fail the EVM address regex and are filtered out downstream
by useTokenLists via safeParse.

Closes #438

Author: gabitoesmiapodo

src/hooks/useTokenLists.test.ts

@@ -4,7 +4,7 @@ import type { ReactNode } from 'react'
 import { createElement } from 'react'
 import { zeroAddress } from 'viem'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
-import type { Token } from '@/src/types/token'
+import { type Token, tokenSchema } from '@/src/types/token'
 import tokenListsCache, { updateTokenListsCache } from '@/src/utils/tokenListsCache'
 
 vi.mock('@/src/utils/tokenListsCache', () => {
@@ -155,6 +155,28 @@ describe('fetchTokenList', () => {
     expect(result.tokens).toEqual([])
     warnSpy.mockRestore()
   })
+
+  describe("'default' bundled token list", () => {
+    it('returns a non-empty tokens array', async () => {
+      const result = await fetchTokenList('default')
+
+      expect(Array.isArray(result.tokens)).toBe(true)
+      expect(result.tokens.length).toBeGreaterThan(0)
+    })
+
+    it('every EVM token entry conforms to tokenSchema', async () => {
+      const result = await fetchTokenList('default')
+
+      // The bundled list includes non-EVM tokens (e.g. Solana with base58 addresses)
+      // alongside EVM tokens. Non-EVM entries are filtered out downstream by useTokenLists
+      // via safeParse. Here we validate only the EVM-addressable subset.
+      const evmTokens = result.tokens.filter(({ address }) => /^0x[a-fA-F0-9]{40}$/.test(address))
+      expect(evmTokens.length).toBeGreaterThan(0)
+      for (const token of evmTokens) {
+        expect(() => tokenSchema.parse(token)).not.toThrow()
+      }
+    })
+  })
 })
 
 describe('useTokenLists', () => {