import java.util.*;

public class Main {
    static final int MOD = 1000000007;
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < t; i++) {
		    int n = sc.nextInt();
		    long ans = 1;
		    for (int j = 0; j < n; j++) {
		        ans *= sc.nextInt() + 1;
		        ans %= MOD;
		    }
		    ans--;
		    ans += MOD;
		    ans %= MOD;
		    sb.append(ans).append("\n");
		}
		System.out.print(sb);
	}
}