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Unified Diff: tests/lib/math/math2_test.dart

Issue 10829459: Deprecate Math object in corelib in favor of dart:math library. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Address review comments. Created 8 years, 4 months ago
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Index: tests/lib/math/math2_test.dart
diff --git a/tests/corelib/math_test.dart b/tests/lib/math/math2_test.dart
similarity index 50%
rename from tests/corelib/math_test.dart
rename to tests/lib/math/math2_test.dart
index a7b8d5bf1f525c7d62900d305ce445345464ddbd..54687b93466f05ae4e390342065b00e2b83e0049 100644
--- a/tests/corelib/math_test.dart
+++ b/tests/lib/math/math2_test.dart
@@ -1,4 +1,4 @@
-// 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.
@@ -8,256 +8,6 @@
#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.
@@ -509,6 +259,5 @@ class MathLibraryTest {
}
main() {
- MathTest.testMain();
MathLibraryTest.testMain();
}
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