import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)

mod = 10 ** 9 + 7
T = int(input())
for _ in range(T):
    N = int(input())
    A = list(map(int, input().split()))
    ans = 1
    for a in A:
        ans *= 1 + a
        ans %= mod
    ans -= 1
    print(ans % mod)