#include <iostream>
#include <vector>
using namespace std;
using ll = long long int;
const ll MOD = 1000000007;

int main(){
    int t;
    cin >> t;
    while(t--){
        int n;
        cin >> n;
        vector<ll> a(n);
        for(auto &p: a) cin >> p;
        ll ans = 1;
        for(auto &p: a){
            ans *= p+1;
            ans %= MOD;
        }
        ans--;
        ans += MOD;
        cout << ans%MOD << endl;
    }
    return 0;
}