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#include "classfile/vmClasses.hpp"
#include "memory/resourceArea.hpp"
#include "oops/instanceKlass.hpp"
#include "oops/jmethodIDTable.hpp"
#include "oops/method.hpp"
#include "unittest.hpp"
#include "utilities/growableArray.hpp"

// Tests for creating and deleting jmethodIDs
TEST_VM(jmethodIDTable, test_jmethod_ids) {
  InstanceKlass* klass = vmClasses::ClassLoader_klass();
  Array<Method*>* methods = klass->methods();
  int length = methods->length();
  // How many entries are in the jmethodID table?
  uint64_t initial_entries = JmethodIDTable::get_entry_count();
  ResourceMark rm;
  GrowableArray<uint64_t> ints(10);
  for (int i = 0; i < length; i++) {
    Method* m = methods->at(i);
    jmethodID mid = m->jmethod_id();
    ints.push((uint64_t)mid);
  }
  uint64_t entries_now = JmethodIDTable::get_entry_count();
  ASSERT_TRUE(entries_now == initial_entries + length) << "should have more entries " << entries_now << " " << initial_entries + length;

  // Test that new entries aren't created, and the values are the same.
  for (int i = 0; i < length; i++) {
    Method* m = methods->at(i);
    jmethodID mid = m->jmethod_id();
    ASSERT_TRUE(ints.at(i) == (uint64_t)mid) << "should be the same";
  }
  // should have the same number of entries
  entries_now = JmethodIDTable::get_entry_count();
  ASSERT_TRUE(entries_now == initial_entries + length) << "should have more entries " << entries_now << " " << initial_entries + length;
}