#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  cin >> t;
  while (t--) {
    int n, m;
    cin >> n >> m;
    int arr[n];
    for (int i = 0; i < n; i++) {
      cin >> arr[i];
    }
    int sum = 0;
    for (int i = 0; i < n; i++) {
      sum = sum + arr[i];
    }
    if (sum <= m) {
      cout << sum << endl;
    }
    if (sum > m) {
      cout << m << endl;
    }
  }
}
