#include <bits/stdc++.h>
using namespace std;
void _print(long long t) { cerr << t; }
void _print(string t) { cerr << t; }
void _print(char t) { cerr << t; }
void _print(long double t) { cerr << t; }
void _print(double t) { cerr << t; }
void _print(unsigned long long t) { cerr << t; }
template <class T, class V>
void _print(pair<T, V> p);
template <class T>
void _print(vector<T> v);
template <class T>
void _print(set<T> v);
template <class T, class V>
void _print(map<T, V> v);
template <class T>
void _print(multiset<T> v);
template <class T, class V>
void _print(pair<T, V> p) {
  cerr << "{";
  _print(p.first);
  cerr << ",";
  _print(p.second);
  cerr << "}";
}
template <class T>
void _print(vector<T> v) {
  cerr << "[ ";
  for (T i : v) {
    _print(i);
    cerr << " ";
  }
  cerr << "]";
}
template <class T>
void _print(set<T> v) {
  cerr << "[ ";
  for (T i : v) {
    _print(i);
    cerr << " ";
  }
  cerr << "]";
}
template <class T>
void _print(multiset<T> v) {
  cerr << "[ ";
  for (T i : v) {
    _print(i);
    cerr << " ";
  }
  cerr << "]";
}
template <class T, class V>
void _print(map<T, V> v) {
  cerr << "[ ";
  for (auto i : v) {
    _print(i);
    cerr << " ";
  }
  cerr << "]";
}
long long power(long long x, long long n) {
  long long result = 1;
  while (n > 0) {
    if (n % 2 == 1) result = (result * x) % 1000000007;
    x = (x * x) % 1000000007;
    n = n / 2;
  }
  return result % 1000000007;
}
template <class T>
T gcd(T a, T b) {
  while (a != 0) {
    T temp = a;
    a = b % a;
    b = temp;
  }
  return b;
}
bool compare(long long a, long long b) { return a >= b; }
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long t;
  cin >> t;
  while (t--) {
    long long a;
    cin >> a;
    vector<long long> vec(a);
    set<long long> st;
    bool z = 0;
    for (long long i = 0; i < a; i++) cin >> vec[i];
    for (long long i = 1; i < a; i++) {
      st.insert(vec[i] - vec[i - 1]);
    }
    st.insert(vec[0] - vec[a - 1]);
    if (*st.begin() == -1 && *st.rbegin() == (a - 1)) z = 1;
    if (*st.rbegin() == 1 && *st.begin() == (1 - a)) z = 1;
    if (z || vec.size() == 1)
      cout << "YES"
           << "\n";
    else
      cout << "NO"
           << "\n";
  }
}
