Deprecate Math object in corelib in favor of dart:math library.

tests/lib/math/math2_test.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
 // We temporarily test both the new math library and the old Math
 // class. This can easily be simplified once we get rid of the Math
 // class entirely.
 #library('math_test');
 #import('dart:math', prefix: 'math');
 
-class MathTest {
-  static void testConstants() {
-    // Source for mathematical constants is Wolfram Alpha.
-    Expect.equals(2.7182818284590452353602874713526624977572470936999595749669,
-                  Math.E);
-    Expect.equals(2.3025850929940456840179914546843642076011014886287729760333,
-                  Math.LN10);
-    Expect.equals(0.6931471805599453094172321214581765680755001343602552541206,
-                  Math.LN2);
-    Expect.equals(1.4426950408889634073599246810018921374266459541529859341354,
-                  Math.LOG2E);
-    Expect.equals(0.4342944819032518276511289189166050822943970058036665661144,
-                  Math.LOG10E);
-    Expect.equals(3.1415926535897932384626433832795028841971693993751058209749,
-                  Math.PI);
-    Expect.equals(0.7071067811865475244008443621048490392848359376884740365883,
-                  Math.SQRT1_2);
-    Expect.equals(1.4142135623730950488016887242096980785696718753769480731766,
-                  Math.SQRT2);
-  }
-
-  static checkClose(double a, double b, EPSILON) {
-    Expect.equals(true, a - EPSILON <= b);
-    Expect.equals(true, b <= a + EPSILON);
-  }
-
-  static void testSin() {
-    // Given the imprecision of PI we can't expect better results than this.
-    final double EPSILON = 1e-15;
-    checkClose(0.0, Math.sin(0.0), EPSILON);
-    checkClose(0.0, Math.sin(Math.PI), EPSILON);
-    checkClose(0.0, Math.sin(2.0 * Math.PI), EPSILON);
-    checkClose(1.0, Math.sin(Math.PI / 2.0), EPSILON);
-    checkClose(-1.0, Math.sin(Math.PI * (3.0 / 2.0)), EPSILON);
-  }
-
-  static void testCos() {
-    // Given the imprecision of PI we can't expect better results than this.
-    final double EPSILON = 1e-15;
-    checkClose(1.0, Math.cos(0.0), EPSILON);
-    checkClose(-1.0, Math.cos(Math.PI), EPSILON);
-    checkClose(1.0, Math.cos(2.0 * Math.PI), EPSILON);
-    checkClose(0.0, Math.cos(Math.PI / 2.0), EPSILON);
-    checkClose(0.0, Math.cos(Math.PI * (3.0 / 2.0)), EPSILON);
-  }
-
-  static void testTan() {
-    // Given the imprecision of PI we can't expect better results than this.
-    final double EPSILON = 1e-15;
-    checkClose(0.0, Math.tan(0.0), EPSILON);
-    checkClose(0.0, Math.tan(Math.PI), EPSILON);
-    checkClose(0.0, Math.tan(2.0 * Math.PI), EPSILON);
-    checkClose(1.0, Math.tan(Math.PI / 4.0), EPSILON);
-  }
-
-  static void testAsin() {
-    // Given the imprecision of PI we can't expect better results than this.
-    final double EPSILON = 1e-15;
-    checkClose(0.0, Math.asin(0.0), EPSILON);
-    checkClose(Math.PI / 2.0, Math.asin(1.0), EPSILON);
-    checkClose(-Math.PI / 2.0, Math.asin(-1.0), EPSILON);
-  }
-
-
-  static void testAcos() {
-    // Given the imprecision of PI we can't expect better results than this.
-    final double EPSILON = 1e-15;
-    checkClose(0.0, Math.acos(1.0), EPSILON);
-    checkClose(Math.PI, Math.acos(-1.0), EPSILON);
-    checkClose(Math.PI / 2.0, Math.acos(0.0), EPSILON);
-  }
-
-  static void testAtan() {
-    // Given the imprecision of PI we can't expect better results than this.
-    final double EPSILON = 1e-15;
-    checkClose(0.0, Math.atan(0.0), EPSILON);
-    checkClose(Math.PI / 4.0, Math.atan(1.0), EPSILON);
-    checkClose(-Math.PI / 4.0, Math.atan(-1.0), EPSILON);
-  }
-
-  static void testAtan2() {
-    // Given the imprecision of PI we can't expect better results than this.
-    final double EPSILON = 1e-15;
-    checkClose(0.0, Math.atan2(0.0, 5.0), EPSILON);
-    checkClose(Math.PI / 4.0, Math.atan2(2.0, 2.0), EPSILON);
-    checkClose(3 * Math.PI / 4.0, Math.atan2(0.5, -0.5), EPSILON);
-    checkClose(-3 * Math.PI / 4.0, Math.atan2(-2.5, -2.5), EPSILON);
-  }
-
-  static checkVeryClose(double a, double b) {
-    // We find a ulp (unit in the last place) by shifting the original number
-    // to the right. This only works if we are not too close to infinity or if
-    // we work with denormals.
-    // We special case or 0.0, but not for infinity.
-    if (a == 0.0) {
-      final minimalDouble = 4.9406564584124654e-324;
-      Expect.equals(true, b.abs() <= minimalDouble);
-      return;
-    }
-    if (b == 0.0) {
-      // No need to look if they are close. Otherwise the check for 'a' above
-      // whould have triggered.
-      Expect.equals(a, b);
-    }
-    final double shiftRightBy52 = 2.220446049250313080847263336181640625e-16;
-    final double shiftedA = (a * shiftRightBy52).abs();
-    // Compared to 'a', 'shiftedA' is now ~1-2 ulp.
-
-    final double limitLow = a - shiftedA;
-    final double limitHigh = a + shiftedA;
-    Expect.equals(false, a == limitLow);
-    Expect.equals(false, a == limitHigh);
-    Expect.equals(true, limitLow <= b);
-    Expect.equals(true, b <= limitHigh);
-  }
-
-  static void testSqrt() {
-    checkVeryClose(2.0, Math.sqrt(4.0));
-    checkVeryClose(Math.SQRT2, Math.sqrt(2.0));
-    checkVeryClose(Math.SQRT1_2, Math.sqrt(0.5));
-    checkVeryClose(1e50, Math.sqrt(1e100));
-    checkVeryClose(1.1111111061110855443054405046358901279277111935183977e56,
-                   Math.sqrt(12345678901234e99));
-  }
-
-  static void testExp() {
-    checkVeryClose(Math.E, Math.exp(1.0));
-    final EPSILON = 1e-15;
-    checkClose(10.0, Math.exp(Math.LN10), EPSILON);
-    checkClose(2.0, Math.exp(Math.LN2), EPSILON);
-  }
-
-  static void testLog() {
-    // Even though E is imprecise, it is good enough to get really close to 1.
-    // We still provide an epsilon.
-    checkClose(1.0, Math.log(Math.E), 1e-16);
-    checkVeryClose(Math.LN10, Math.log(10.0));
-    checkVeryClose(Math.LN2, Math.log(2.0));
-  }
-
-  static void testPow() {
-    checkVeryClose(16.0, Math.pow(4.0, 2.0));
-    checkVeryClose(Math.SQRT2, Math.pow(2.0, 0.5));
-    checkVeryClose(Math.SQRT1_2, Math.pow(0.5, 0.5));
-  }
-
-  static bool parseIntThrowsFormatException(str) {
-    try {
-      Math.parseInt(str);
-      return false;
-    } catch (FormatException e) {
-      return true;
-    }
-  }
-
-  static void testParseInt() {
-    Expect.equals(499, Math.parseInt("499"));
-    Expect.equals(499, Math.parseInt("+499"));
-    Expect.equals(-499, Math.parseInt("-499"));
-    Expect.equals(499, Math.parseInt("   499   "));
-    Expect.equals(499, Math.parseInt("   +499   "));
-    Expect.equals(-499, Math.parseInt("   -499   "));
-    Expect.equals(0, Math.parseInt("0"));
-    Expect.equals(0, Math.parseInt("+0"));
-    Expect.equals(0, Math.parseInt("-0"));
-    Expect.equals(0, Math.parseInt("   0   "));
-    Expect.equals(0, Math.parseInt("   +0   "));
-    Expect.equals(0, Math.parseInt("   -0   "));
-    Expect.equals(0x1234567890, Math.parseInt("0x1234567890"));
-    Expect.equals(-0x1234567890, Math.parseInt("-0x1234567890"));
-    Expect.equals(0x1234567890, Math.parseInt("   0x1234567890   "));
-    Expect.equals(-0x1234567890, Math.parseInt("   -0x1234567890   "));
-    Expect.equals(256, Math.parseInt("0x100"));
-    Expect.equals(-256, Math.parseInt("-0x100"));
-    Expect.equals(256, Math.parseInt("   0x100   "));
-    Expect.equals(-256, Math.parseInt("   -0x100   "));
-    Expect.equals(0xabcdef, Math.parseInt("0xabcdef"));
-    Expect.equals(0xABCDEF, Math.parseInt("0xABCDEF"));
-    Expect.equals(0xabcdef, Math.parseInt("0xabCDEf"));
-    Expect.equals(-0xabcdef, Math.parseInt("-0xabcdef"));
-    Expect.equals(-0xABCDEF, Math.parseInt("-0xABCDEF"));
-    Expect.equals(0xabcdef, Math.parseInt("   0xabcdef   "));
-    Expect.equals(0xABCDEF, Math.parseInt("   0xABCDEF   "));
-    Expect.equals(-0xabcdef, Math.parseInt("   -0xabcdef   "));
-    Expect.equals(-0xABCDEF, Math.parseInt("   -0xABCDEF   "));
-    Expect.equals(0xabcdef, Math.parseInt("0x00000abcdef"));
-    Expect.equals(0xABCDEF, Math.parseInt("0x00000ABCDEF"));
-    Expect.equals(-0xabcdef, Math.parseInt("-0x00000abcdef"));
-    Expect.equals(-0xABCDEF, Math.parseInt("-0x00000ABCDEF"));
-    Expect.equals(0xabcdef, Math.parseInt("   0x00000abcdef   "));
-    Expect.equals(0xABCDEF, Math.parseInt("   0x00000ABCDEF   "));
-    Expect.equals(-0xabcdef, Math.parseInt("   -0x00000abcdef   "));
-    Expect.equals(-0xABCDEF, Math.parseInt("   -0x00000ABCDEF   "));
-    Expect.equals(10, Math.parseInt("010"));
-    Expect.equals(-10, Math.parseInt("-010"));
-    Expect.equals(10, Math.parseInt("   010   "));
-    Expect.equals(-10, Math.parseInt("   -010   "));
-    Expect.equals(9, Math.parseInt("09"));
-    Expect.equals(9, Math.parseInt(" 09 "));
-    Expect.equals(-9, Math.parseInt("-09"));
-    Expect.equals(true, parseIntThrowsFormatException("1b"));
-    Expect.equals(true, parseIntThrowsFormatException(" 1b "));
-    Expect.equals(true, parseIntThrowsFormatException(" 1 b "));
-    Expect.equals(true, parseIntThrowsFormatException("1e2"));
-    Expect.equals(true, parseIntThrowsFormatException(" 1e2 "));
-    Expect.equals(true, parseIntThrowsFormatException("00x12"));
-    Expect.equals(true, parseIntThrowsFormatException(" 00x12 "));
-    Expect.equals(true, parseIntThrowsFormatException("-1b"));
-    Expect.equals(true, parseIntThrowsFormatException(" -1b "));
-    Expect.equals(true, parseIntThrowsFormatException(" -1 b "));
-    Expect.equals(true, parseIntThrowsFormatException("-1e2"));
-    Expect.equals(true, parseIntThrowsFormatException(" -1e2 "));
-    Expect.equals(true, parseIntThrowsFormatException("-00x12"));
-    Expect.equals(true, parseIntThrowsFormatException(" -00x12 "));
-    Expect.equals(true, parseIntThrowsFormatException("  -00x12 "));
-    Expect.equals(true, parseIntThrowsFormatException("0x0x12"));
-    Expect.equals(true, parseIntThrowsFormatException("0.1"));
-    Expect.equals(true, parseIntThrowsFormatException("0x3.1"));
-    Expect.equals(true, parseIntThrowsFormatException("5."));
-    Expect.equals(true, parseIntThrowsFormatException("+-5"));
-    Expect.equals(true, parseIntThrowsFormatException("-+5"));
-    Expect.equals(true, parseIntThrowsFormatException("--5"));
-    Expect.equals(true, parseIntThrowsFormatException("++5"));
-    Expect.equals(true, parseIntThrowsFormatException("+ 5"));
-    Expect.equals(true, parseIntThrowsFormatException("- 5"));
-    Expect.equals(true, parseIntThrowsFormatException(""));
-    Expect.equals(true, parseIntThrowsFormatException("  "));
-    Expect.equals(true, parseIntThrowsFormatException("+0x1234567890"));
-    Expect.equals(true, parseIntThrowsFormatException("   +0x1234567890   "));
-    Expect.equals(true, parseIntThrowsFormatException("+0x100"));
-    Expect.equals(true, parseIntThrowsFormatException("   +0x100   "));
-  }
-
-  static testMain() {
-    testConstants();
-    testSin();
-    testCos();
-    testTan();
-    testAsin();
-    testAcos();
-    testAtan();
-    testAtan2();
-    testSqrt();
-    testLog();
-    testExp();
-    testPow();
-    testParseInt();
-  }
-}
-
 class MathLibraryTest {
   static void testConstants() {
     // Source for mathematical constants is Wolfram Alpha.
     Expect.equals(2.7182818284590452353602874713526624977572470936999595749669,
                   math.E);
     Expect.equals(2.3025850929940456840179914546843642076011014886287729760333,
                   math.LN10);
     Expect.equals(0.6931471805599453094172321214581765680755001343602552541206,
                   math.LN2);
     Expect.equals(1.4426950408889634073599246810018921374266459541529859341354,
@@ skipping 231 matching lines @@
     testAtan2();
     testSqrt();
     testLog();
     testExp();
     testPow();
     testParseInt();
   }
 }
 
 main() {
-  MathTest.testMain();
   MathLibraryTest.testMain();
 }