//#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef unsigned long long ull;
 
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll myRand(ll B) {
	return (ull)rng() % B;
}

constexpr ll mod=1e9+7;

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int q; cin >> q;
    while(q--){
        int n; cin >> n;
        ll res=1;
        for(int i=0;i<n;i++){
            ll a; cin >> a;
            res*=(a+1);
            res%=mod;
        }
        cout << (res-1+mod)%mod << endl;
    }
}