#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("YES");}else{puts("NO");}
#define MAX_N 200005
const ll MOD = 1000000007;
int main() {
    int T; cin >> T;
    rep(_,T){
        ll n; cin >> n;
        ll a[n] = {};
        rep(i,n) cin >> a[i];
        ll now = a[0];
        srep(i,1,n){
            now = now * a[i] + now + a[i];
            now %= MOD;
        }
        cout << now << endl;
    }
    return 0;
}