#include<bits/stdc++.h>
// #include<atcoder/all>

using namespace std;
// using namespace atcoder;
using ll = long long;
using ull = unsigned long long;
using P = pair<int,int>;
#define rep(i,n) for(ll i = 0;i < (ll)n;i++)
#define ALL(x) (x).begin(),(x).end()
#define MOD 1000000007


int main(){
  
  int T;
  cin >> T;
  while(T--){
    int n;
    cin >> n;
    ll res = 1;
    rep(i,n){
      ll k;cin >> k;
      (res *= (k+1))%= MOD;
    }
    res = (res-1+MOD)%MOD;
    cout << res << "\n";
  }


  return 0;
}