Bob Nystrom
6c757957db
DDC's codegen test copies those files to a local "gen" directory so that it can do stuff like splitting out the multitests before it compiles them to JS. I left all of that alone, so the rest of DDC's test infrastructure is unchanged. The very first step that builds the "gen" directory just copies from sdk/tests/..._strong/... instead and the rest is good to go. I did not move not_yet_strong_tests.dart somewhere more accessible yet because I'm not sure if kernel needs it or where it should go. I did not create any status files because DDC doesn't need them and there are no test suites for the new directories for the other platforms.
266 lines
11 KiB
Dart
266 lines
11 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// We temporarily test both the new math library and the old Math
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// class. This can easily be simplified once we get rid of the Math
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// class entirely.
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library math_test;
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import "package:expect/expect.dart";
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import 'dart:math' as math;
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class MathLibraryTest {
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static void testConstants() {
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// Source for mathematical constants is Wolfram Alpha.
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Expect.equals(2.7182818284590452353602874713526624977572470936999595749669,
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math.E);
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Expect.equals(2.3025850929940456840179914546843642076011014886287729760333,
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math.LN10);
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Expect.equals(0.6931471805599453094172321214581765680755001343602552541206,
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math.LN2);
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Expect.equals(1.4426950408889634073599246810018921374266459541529859341354,
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math.LOG2E);
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Expect.equals(0.4342944819032518276511289189166050822943970058036665661144,
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math.LOG10E);
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Expect.equals(3.1415926535897932384626433832795028841971693993751058209749,
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math.PI);
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Expect.equals(0.7071067811865475244008443621048490392848359376884740365883,
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math.SQRT1_2);
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Expect.equals(1.4142135623730950488016887242096980785696718753769480731766,
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math.SQRT2);
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}
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static checkClose(double a, double b, EPSILON) {
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Expect.equals(true, a - EPSILON <= b);
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Expect.equals(true, b <= a + EPSILON);
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}
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static void testSin() {
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// Given the imprecision of PI we can't expect better results than this.
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final double EPSILON = 1e-15;
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checkClose(0.0, math.sin(0.0), EPSILON);
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checkClose(0.0, math.sin(math.PI), EPSILON);
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checkClose(0.0, math.sin(2.0 * math.PI), EPSILON);
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checkClose(1.0, math.sin(math.PI / 2.0), EPSILON);
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checkClose(-1.0, math.sin(math.PI * (3.0 / 2.0)), EPSILON);
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}
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static void testCos() {
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// Given the imprecision of PI we can't expect better results than this.
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final double EPSILON = 1e-15;
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checkClose(1.0, math.cos(0.0), EPSILON);
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checkClose(-1.0, math.cos(math.PI), EPSILON);
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checkClose(1.0, math.cos(2.0 * math.PI), EPSILON);
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checkClose(0.0, math.cos(math.PI / 2.0), EPSILON);
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checkClose(0.0, math.cos(math.PI * (3.0 / 2.0)), EPSILON);
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}
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static void testTan() {
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// Given the imprecision of PI we can't expect better results than this.
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final double EPSILON = 1e-15;
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checkClose(0.0, math.tan(0.0), EPSILON);
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checkClose(0.0, math.tan(math.PI), EPSILON);
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checkClose(0.0, math.tan(2.0 * math.PI), EPSILON);
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checkClose(1.0, math.tan(math.PI / 4.0), EPSILON);
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}
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static void testAsin() {
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// Given the imprecision of PI we can't expect better results than this.
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final double EPSILON = 1e-15;
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checkClose(0.0, math.asin(0.0), EPSILON);
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checkClose(math.PI / 2.0, math.asin(1.0), EPSILON);
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checkClose(-math.PI / 2.0, math.asin(-1.0), EPSILON);
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}
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static void testAcos() {
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// Given the imprecision of PI we can't expect better results than this.
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final double EPSILON = 1e-15;
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checkClose(0.0, math.acos(1.0), EPSILON);
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checkClose(math.PI, math.acos(-1.0), EPSILON);
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checkClose(math.PI / 2.0, math.acos(0.0), EPSILON);
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}
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static void testAtan() {
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// Given the imprecision of PI we can't expect better results than this.
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final double EPSILON = 1e-15;
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checkClose(0.0, math.atan(0.0), EPSILON);
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checkClose(math.PI / 4.0, math.atan(1.0), EPSILON);
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checkClose(-math.PI / 4.0, math.atan(-1.0), EPSILON);
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}
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static void testAtan2() {
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// Given the imprecision of PI we can't expect better results than this.
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final double EPSILON = 1e-15;
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checkClose(0.0, math.atan2(0.0, 5.0), EPSILON);
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checkClose(math.PI / 4.0, math.atan2(2.0, 2.0), EPSILON);
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checkClose(3 * math.PI / 4.0, math.atan2(0.5, -0.5), EPSILON);
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checkClose(-3 * math.PI / 4.0, math.atan2(-2.5, -2.5), EPSILON);
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}
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static checkVeryClose(double a, double b) {
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// We find a ulp (unit in the last place) by shifting the original number
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// to the right. This only works if we are not too close to infinity or if
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// we work with denormals.
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// We special case or 0.0, but not for infinity.
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if (a == 0.0) {
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final minimalDouble = 4.9406564584124654e-324;
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Expect.equals(true, b.abs() <= minimalDouble);
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return;
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}
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if (b == 0.0) {
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// No need to look if they are close. Otherwise the check for 'a' above
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// whould have triggered.
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Expect.equals(a, b);
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}
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final double shiftRightBy52 = 2.220446049250313080847263336181640625e-16;
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final double shiftedA = (a * shiftRightBy52).abs();
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// Compared to 'a', 'shiftedA' is now ~1-2 ulp.
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final double limitLow = a - shiftedA;
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final double limitHigh = a + shiftedA;
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Expect.equals(false, a == limitLow);
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Expect.equals(false, a == limitHigh);
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Expect.equals(true, limitLow <= b);
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Expect.equals(true, b <= limitHigh);
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}
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static void testSqrt() {
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checkVeryClose(2.0, math.sqrt(4.0));
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checkVeryClose(math.SQRT2, math.sqrt(2.0));
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checkVeryClose(math.SQRT1_2, math.sqrt(0.5));
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checkVeryClose(1e50, math.sqrt(1e100));
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checkVeryClose(1.1111111061110855443054405046358901279277111935183977e56,
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math.sqrt(12345678901234e99));
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}
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static void testExp() {
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checkVeryClose(math.E, math.exp(1.0));
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final EPSILON = 1e-15;
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checkClose(10.0, math.exp(math.LN10), EPSILON);
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checkClose(2.0, math.exp(math.LN2), EPSILON);
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}
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static void testLog() {
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// Even though E is imprecise, it is good enough to get really close to 1.
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// We still provide an epsilon.
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checkClose(1.0, math.log(math.E), 1e-16);
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checkVeryClose(math.LN10, math.log(10.0));
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checkVeryClose(math.LN2, math.log(2.0));
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}
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static void testPow() {
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checkVeryClose(16.0, math.pow(4.0, 2.0));
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checkVeryClose(math.SQRT2, math.pow(2.0, 0.5));
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checkVeryClose(math.SQRT1_2, math.pow(0.5, 0.5));
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}
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static bool parseIntThrowsFormatException(str) {
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try {
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int.parse(str);
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return false;
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} on FormatException catch (e) {
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return true;
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}
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}
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static void testParseInt() {
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Expect.equals(499, int.parse("499"));
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Expect.equals(499, int.parse("+499"));
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Expect.equals(-499, int.parse("-499"));
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Expect.equals(499, int.parse(" 499 "));
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Expect.equals(499, int.parse(" +499 "));
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Expect.equals(-499, int.parse(" -499 "));
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Expect.equals(0, int.parse("0"));
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Expect.equals(0, int.parse("+0"));
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Expect.equals(0, int.parse("-0"));
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Expect.equals(0, int.parse(" 0 "));
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Expect.equals(0, int.parse(" +0 "));
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Expect.equals(0, int.parse(" -0 "));
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Expect.equals(0x1234567890, int.parse("0x1234567890"));
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Expect.equals(-0x1234567890, int.parse("-0x1234567890"));
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Expect.equals(0x1234567890, int.parse(" 0x1234567890 "));
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Expect.equals(-0x1234567890, int.parse(" -0x1234567890 "));
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Expect.equals(256, int.parse("0x100"));
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Expect.equals(-256, int.parse("-0x100"));
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Expect.equals(256, int.parse(" 0x100 "));
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Expect.equals(-256, int.parse(" -0x100 "));
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Expect.equals(0xabcdef, int.parse("0xabcdef"));
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Expect.equals(0xABCDEF, int.parse("0xABCDEF"));
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Expect.equals(0xabcdef, int.parse("0xabCDEf"));
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Expect.equals(-0xabcdef, int.parse("-0xabcdef"));
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Expect.equals(-0xABCDEF, int.parse("-0xABCDEF"));
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Expect.equals(0xabcdef, int.parse(" 0xabcdef "));
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Expect.equals(0xABCDEF, int.parse(" 0xABCDEF "));
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Expect.equals(-0xabcdef, int.parse(" -0xabcdef "));
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Expect.equals(-0xABCDEF, int.parse(" -0xABCDEF "));
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Expect.equals(0xabcdef, int.parse("0x00000abcdef"));
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Expect.equals(0xABCDEF, int.parse("0x00000ABCDEF"));
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Expect.equals(-0xabcdef, int.parse("-0x00000abcdef"));
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Expect.equals(-0xABCDEF, int.parse("-0x00000ABCDEF"));
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Expect.equals(0xabcdef, int.parse(" 0x00000abcdef "));
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Expect.equals(0xABCDEF, int.parse(" 0x00000ABCDEF "));
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Expect.equals(-0xabcdef, int.parse(" -0x00000abcdef "));
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Expect.equals(-0xABCDEF, int.parse(" -0x00000ABCDEF "));
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Expect.equals(10, int.parse("010"));
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Expect.equals(-10, int.parse("-010"));
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Expect.equals(10, int.parse(" 010 "));
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Expect.equals(-10, int.parse(" -010 "));
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Expect.equals(9, int.parse("09"));
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Expect.equals(9, int.parse(" 09 "));
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Expect.equals(-9, int.parse("-09"));
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Expect.equals(0x1234567890, int.parse("+0x1234567890"));
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Expect.equals(0x1234567890, int.parse(" +0x1234567890 "));
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Expect.equals(0x100, int.parse("+0x100"));
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Expect.equals(0x100, int.parse(" +0x100 "));
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Expect.equals(true, parseIntThrowsFormatException("1b"));
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Expect.equals(true, parseIntThrowsFormatException(" 1b "));
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Expect.equals(true, parseIntThrowsFormatException(" 1 b "));
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Expect.equals(true, parseIntThrowsFormatException("1e2"));
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Expect.equals(true, parseIntThrowsFormatException(" 1e2 "));
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Expect.equals(true, parseIntThrowsFormatException("00x12"));
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Expect.equals(true, parseIntThrowsFormatException(" 00x12 "));
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Expect.equals(true, parseIntThrowsFormatException("-1b"));
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Expect.equals(true, parseIntThrowsFormatException(" -1b "));
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Expect.equals(true, parseIntThrowsFormatException(" -1 b "));
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Expect.equals(true, parseIntThrowsFormatException("-1e2"));
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Expect.equals(true, parseIntThrowsFormatException(" -1e2 "));
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Expect.equals(true, parseIntThrowsFormatException("-00x12"));
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Expect.equals(true, parseIntThrowsFormatException(" -00x12 "));
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Expect.equals(true, parseIntThrowsFormatException(" -00x12 "));
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Expect.equals(true, parseIntThrowsFormatException("0x0x12"));
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Expect.equals(true, parseIntThrowsFormatException("0.1"));
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Expect.equals(true, parseIntThrowsFormatException("0x3.1"));
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Expect.equals(true, parseIntThrowsFormatException("5."));
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Expect.equals(true, parseIntThrowsFormatException("+-5"));
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Expect.equals(true, parseIntThrowsFormatException("-+5"));
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Expect.equals(true, parseIntThrowsFormatException("--5"));
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Expect.equals(true, parseIntThrowsFormatException("++5"));
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Expect.equals(true, parseIntThrowsFormatException("+ 5"));
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Expect.equals(true, parseIntThrowsFormatException("- 5"));
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Expect.equals(true, parseIntThrowsFormatException(""));
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Expect.equals(true, parseIntThrowsFormatException(" "));
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}
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static testMain() {
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testConstants();
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testSin();
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testCos();
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testTan();
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testAsin();
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testAcos();
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testAtan();
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testAtan2();
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testSqrt();
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testLog();
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testExp();
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testPow();
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testParseInt();
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}
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}
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main() {
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MathLibraryTest.testMain();
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}
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