import sys
input = lambda : sys.stdin.readline().rstrip()

sys.setrecursionlimit(2*10**5+10)
write = lambda x: sys.stdout.write(x+"\n")
_print = lambda *x: print(*x, file=sys.stderr)

t = int(input())
M = 10**9+7
def sub(a):
    n = len(a)
    dp = [0]*(n+1)
    dp[0] = 1
    for i in range(n):
        ndp = [0]*(n+1)
        ndp[0] = 1
        for j in range(1,n+1):
            ndp[j] = dp[j-1]*a[i] + dp[j]
            ndp[j] %= M
        dp = ndp
#         print(dp)
    ans = sum(dp[1:])%M
    return ans
for _ in range(t):
    n = int(input())
    a = list(map(int, input().split()))
    print(sub(a))