1// Copyright JS Foundation and other contributors, http://js.foundation 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15var nan = NaN; 16var p_zero = 0.0; 17var m_zero = -p_zero; 18var p_inf = Infinity; 19var m_inf = -p_inf; 20 21function isSameZero (x, y) 22{ 23 return x === 0 && (1 / x) === (1 / y); 24} 25 26assert (isNaN(Math['trunc'](NaN))); 27assert (isSameZero (Math['trunc'](p_zero), p_zero)); 28assert (isSameZero (Math['trunc'](m_zero), m_zero)); 29assert (Math['trunc'](p_inf) === p_inf); 30assert (Math['trunc'](m_inf) === m_inf); 31assert (isSameZero (Math['trunc'](0.5), p_zero)); 32assert (isSameZero (Math['trunc'](-0.5), m_zero)); 33assert (Math['trunc'](1.2) === 1); 34assert (Math['trunc'](-1.5) === -1); 35assert (Math['trunc'](65.7) === 65); 36assert (Math['trunc'](-24.9) === -24); 37