LibTest/math/atan_A01_t01.dart

// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

/// @assertion double atan(num x)
/// Converts [x] to a dobule and returns its arc tangent in radians.
///
/// @description Checks set of values.
///
/// @issue 26261
/// @author msyabro


import "dart:math" as Math;
import "../../Utils/expect.dart";

main() {
  int vnum = 64;
  var x = new List(64);
  x[0] = -16.00000000000000000000;
  x[1] = -15.49206349206349200000;
  x[2] = -14.98412698412698400000;
  x[3] = -14.47619047619047600000;
  x[4] = -13.96825396825396800000;
  x[5] = -13.46031746031746000000;
  x[6] = -12.95238095238095300000;
  x[7] = -12.44444444444444500000;
  x[8] = -11.93650793650793700000;
  x[9] = -11.42857142857142900000;
  x[10] = -10.92063492063492100000;
  x[11] = -10.41269841269841300000;
  x[12] = -9.90476190476190510000;
  x[13] = -9.39682539682539720000;
  x[14] = -8.88888888888888930000;
  x[15] = -8.38095238095238140000;
  x[16] = -7.87301587301587350000;
  x[17] = -7.36507936507936560000;
  x[18] = -6.85714285714285770000;
  x[19] = -6.34920634920634970000;
  x[20] = -5.84126984126984180000;
  x[21] = -5.33333333333333390000;
  x[22] = -4.82539682539682600000;
  x[23] = -4.31746031746031810000;
  x[24] = -3.80952380952381020000;
  x[25] = -3.30158730158730230000;
  x[26] = -2.79365079365079440000;
  x[27] = -2.28571428571428650000;
  x[28] = -1.77777777777777860000;
  x[29] = -1.26984126984127070000;
  x[30] = -0.76190476190476275000;
  x[31] = -0.25396825396825484000;
  x[32] = 0.25396825396825307000;
  x[33] = 0.76190476190476275000;
  x[34] = 1.26984126984126890000;
  x[35] = 1.77777777777777860000;
  x[36] = 2.28571428571428470000;
  x[37] = 2.79365079365079440000;
  x[38] = 3.30158730158730050000;
  x[39] = 3.80952380952381020000;
  x[40] = 4.31746031746031630000;
  x[41] = 4.82539682539682600000;
  x[42] = 5.33333333333333210000;
  x[43] = 5.84126984126984180000;
  x[44] = 6.34920634920634800000;
  x[45] = 6.85714285714285770000;
  x[46] = 7.36507936507936380000;
  x[47] = 7.87301587301587350000;
  x[48] = 8.38095238095237960000;
  x[49] = 8.88888888888888930000;
  x[50] = 9.39682539682539540000;
  x[51] = 9.90476190476190510000;
  x[52] = 10.41269841269841100000;
  x[53] = 10.92063492063492100000;
  x[54] = 11.42857142857142700000;
  x[55] = 11.93650793650793700000;
  x[56] = 12.44444444444444300000;
  x[57] = 12.95238095238095300000;
  x[58] = 13.46031746031745900000;
  x[59] = 13.96825396825396800000;
  x[60] = 14.47619047619047400000;
  x[61] = 14.98412698412698400000;
  x[62] = 15.49206349206349000000;
  x[63] = 16.00000000000000000000;


  var y = new List(64);
  y[0] = -1.50837751679893930000;
  y[1] = -1.50633657314382670000;
  y[2] = -1.50415785436419310000;
  y[3] = -1.50182694519358660000;
  y[4] = -1.49932735026103090000;
  y[5] = -1.49664010557682300000;
  y[6] = -1.49374329974393950000;
  y[7] = -1.49061147949358030000;
  y[8] = -1.48721490565349580000;
  y[9] = -1.48351861384543530000;
  y[10] = -1.47948121756761840000;
  y[11] = -1.47505336756015580000;
  y[12] = -1.47017574693777100000;
  y[13] = -1.46477643093971600000;
  y[14] = -1.45876736436890870000;
  y[15] = -1.45203959426707030000;
  y[16] = -1.44445671565255360000;
  y[17] = -1.43584570229039390000;
  y[18] = -1.42598382855595760000;
  y[19] = -1.41457960835077490000;
  y[20] = -1.40124433129607070000;
  y[21] = -1.38544837679920190000;
  y[22] = -1.36645204745321510000;
  y[23] = -1.34319210978762000000;
  y[24] = -1.31408799636151090000;
  y[25] = -1.27669520176831860000;
  y[26] = -1.22705270315911450000;
  y[27] = -1.15838588519750950000;
  y[28] = -1.05840686648415900000;
  y[29] = -0.90372394590298166000;
  y[30] = -0.65107672144448037000;
  y[31] = -0.24870998909352368000;
  y[32] = 0.24870998909352202000;
  y[33] = 0.65107672144448037000;
  y[34] = 0.90372394590298100000;
  y[35] = 1.05840686648415900000;
  y[36] = 1.15838588519750910000;
  y[37] = 1.22705270315911450000;
  y[38] = 1.27669520176831840000;
  y[39] = 1.31408799636151090000;
  y[40] = 1.34319210978761980000;
  y[41] = 1.36645204745321510000;
  y[42] = 1.38544837679920190000;
  y[43] = 1.40124433129607070000;
  y[44] = 1.41457960835077490000;
  y[45] = 1.42598382855595760000;
  y[46] = 1.43584570229039390000;
  y[47] = 1.44445671565255360000;
  y[48] = 1.45203959426707030000;
  y[49] = 1.45876736436890870000;
  y[50] = 1.46477643093971600000;
  y[51] = 1.47017574693777100000;
  y[52] = 1.47505336756015580000;
  y[53] = 1.47948121756761840000;
  y[54] = 1.48351861384543530000;
  y[55] = 1.48721490565349580000;
  y[56] = 1.49061147949358030000;
  y[57] = 1.49374329974393950000;
  y[58] = 1.49664010557682300000;
  y[59] = 1.49932735026103090000;
  y[60] = 1.50182694519358660000;
  y[61] = 1.50415785436419310000;
  y[62] = 1.50633657314382670000;
  y[63] = 1.50837751679893930000;

  for (int i = 0; i < vnum; i++) {
    Expect.approxEquals(y[i], Math.atan(x[i]), 0.000000000000001);
  }
}