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