import { run, getCurrentRunLoop, once } from '..';
import { moduleFor, AbstractTestCase } from 'internal-test-helpers';

moduleFor(
  'system/run_loop/once_test',
  class extends AbstractTestCase {
    ['@test calling invokeOnce more than once invokes only once'](assert) {
      let count = 0;
      run(() => {
        function F() {
          count++;
        }
        once(F);
        once(F);
        once(F);
      });

      assert.equal(count, 1, 'should have invoked once');
    }

    ['@test should differentiate based on target'](assert) {
      let A = { count: 0 };
      let B = { count: 0 };
      run(() => {
        function F() {
          this.count++;
        }
        once(A, F);
        once(B, F);
        once(A, F);
        once(B, F);
      });

      assert.equal(A.count, 1, 'should have invoked once on A');
      assert.equal(B.count, 1, 'should have invoked once on B');
    }

    ['@test should ignore other arguments - replacing previous ones'](assert) {
      let A = { count: 0 };
      let B = { count: 0 };

      run(() => {
        function F(amt) {
          this.count += amt;
        }
        once(A, F, 10);
        once(B, F, 20);
        once(A, F, 30);
        once(B, F, 40);
      });

      assert.equal(A.count, 30, 'should have invoked once on A');
      assert.equal(B.count, 40, 'should have invoked once on B');
    }

    ['@test should be inside of a runloop when running'](assert) {
      run(() => {
        once(() => assert.ok(!!getCurrentRunLoop(), 'should have a runloop'));
      });
    }
  }
);