/* -*- coding: utf-8 -*-
 *
 * 1336.cc:  No.1336 Union on Blackboard - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 100;
const int MOD = 1000000007;

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int n;
    scanf("%d", &n);

    int p = 1;
    for (int i = 0; i < n; i++) {
      int ai;
      scanf("%d", &ai);
      p = (ll)p * (ai + 1) % MOD;
    }
    p = (p + MOD - 1) % MOD;

    printf("%d\n", p);
  }
  return 0;
}