#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstring>
#include <cstdlib>
#include <cmath>
using namespace std;
using ll = long long;

constexpr int P = 1000000007;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t;
    cin >> t;

    while (t--) {
        int n;
        cin >> n;

        ll r = 1;
        for (int i = 0; i < n; i++) {
            int a;
            cin >> a;

            r = r * (a + 1) % P;
        }
        r += P - 1;
        r %= P;

        cout << r << '\n';
    }

    return 0;
}