// Copyright 2014 Samsung Electronics Co., Ltd. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. assert( isNaN (Math.log(NaN)) ); assert( isNaN (Math.log (-1)) ); assert( isNaN (Math.log (-Infinity)) ); assert( Math.log (0) === -Infinity ); assert( Math.log (1) === 0 ); assert( Math.log (Infinity) === Infinity ); assert( Math.log (2) >= Math.LN2 * 0.999999 ); assert( Math.log (2) <= Math.LN2 * 1.000001 ); var very_close_to_1_but_greater = 1.0000001; assert( very_close_to_1_but_greater > 1.0 ); assert( Math.log (very_close_to_1_but_greater) >= 0.0 ); assert( Math.log (very_close_to_1_but_greater) <= 0.000001 ); var very_close_to_1_but_less = 0.999999; assert( very_close_to_1_but_less < 1.0 ); assert( Math.log (very_close_to_1_but_less) <= 0.0 ); assert( Math.log (very_close_to_1_but_less) >= -0.00001 ); assert( Math.log (2.7182818284590452354) >= 0.999999 ); assert( Math.log (2.7182818284590452354) <= 1.000001 ); assert( Math.log (0.000000001) <= 0.999999 * (-20.7232658369) ); assert( Math.log (0.000000001) >= 1.000001 * (-20.7232658369) ); assert( Math.log (1.0e+38) >= 0.999999 * 87.4982335338 ); assert( Math.log (1.0e+38) <= 1.000001 * 87.4982335338 );