#include <iostream>
#include <vector>

using namespace std;

void solve() {
  int n, k;
  cin >> n >> k;
  vector<int> a(n);
  for (int &i : a)
    cin >> i;

  int res = 0;
  int len = 0;
  for (int i = 0; i < n; i++) {
    if (len == k) {
      len = 0;
      res++;
      continue;
    }
    if (a[i] == 0) {
      len++;
    }
    if (a[i] == 1) {
      len = 0;
    }
  }
  if (len == k)
    res++;
  cout << res << endl;
}

int main() {
  int t;
  cin >> t;
  while (t--)
    solve();
}