account_repository_test2.go

func TestFetchAccountWhenAccountExists(t *testing.T) {
	repository := createRepositoryWithData(fakeData)
	account, err := repository.FetchAccount(id)

	assert.Equal(t, id, account.Id)
	assert.Equal(t, "John Doe", account.Name)
	assert.Equal(t, 100, account.Balance)
	assert.Nil(t, err)
}

func createRepositoryWithData(fakeData map[string]string) *AccountRepository {
	redis := stubRedis{data: fakeData}
	repository := NewAccountRepository(&redis)
	return repository
}