def solve():
    n = int(input())
    e = []
    e2 = [[0] * n for i in range(n)]
    for i in range(n - 1):
        u, v = map(int, input().split())
        u -= 1
        v -= 1
        e.append((u, v))
        e2[u][v] = 1
        e2[v][u] = 1
    
    ans = 0
    for i in range(n-1):
        for j in range(i, n-1):
            if len(set([*e[i], *e[j]])) != 4:
                continue
            for f in range(2):
                for g in range(2):
                    if e2[e[i][f]][e[j][g]]:
                        ans += 1
    
    print(ans)

t = int(input())
for i in range(t):
    solve()