31 lines
2.1 KiB
C#
31 lines
2.1 KiB
C#
namespace Just.PreciseMath.Tests.SanityChecks;
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public class DoubleDoubleSubtractionChecks
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{
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public static IEnumerable<TheoryDataRow<DoubleDouble, DoubleDouble, DoubleDouble>> ReferenceCases =>
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[
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(new DoubleDouble(2.0), new DoubleDouble(1.0), new DoubleDouble(1.0)),
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(new DoubleDouble(1.0), new DoubleDouble(2.0), new DoubleDouble(-1.0)),
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(new DoubleDouble(3.75), new DoubleDouble(2.5), new DoubleDouble(1.25)),
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(new DoubleDouble(2.5), new DoubleDouble(3.75), new DoubleDouble(-1.25)),
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(new DoubleDouble(65536.0), new DoubleDouble(1.0), new DoubleDouble(65535.0)),
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(new DoubleDouble(65536.0), new DoubleDouble(65535.0), new DoubleDouble(1.0)),
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(DoubleDouble.Parse("812563124576179134673", System.Globalization.CultureInfo.InvariantCulture), new DoubleDouble(127.0), DoubleDouble.Parse("812563124576179134546", System.Globalization.CultureInfo.InvariantCulture)),
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(DoubleDouble.Parse("812563124576179134546", System.Globalization.CultureInfo.InvariantCulture), new DoubleDouble(127.0), DoubleDouble.Parse("812563124576179134419", System.Globalization.CultureInfo.InvariantCulture)),
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(DoubleDouble.Parse("812563124576179134546", System.Globalization.CultureInfo.InvariantCulture), DoubleDouble.Parse("812563124576179134504", System.Globalization.CultureInfo.InvariantCulture), new DoubleDouble(42.0)),
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(DoubleDouble.Parse("812563124576179134546", System.Globalization.CultureInfo.InvariantCulture), new DoubleDouble(0.5), DoubleDouble.Parse("812563124576179134545.5", System.Globalization.CultureInfo.InvariantCulture)),
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(DoubleDouble.Parse("812563124576179134546", System.Globalization.CultureInfo.InvariantCulture), DoubleDouble.Parse("812563124576179134546", System.Globalization.CultureInfo.InvariantCulture), new DoubleDouble(0.0)),
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];
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[Theory]
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[MemberData(nameof(ReferenceCases))]
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public void SubtractionShouldProduceExpectedResults(DoubleDouble left, DoubleDouble right, DoubleDouble expected)
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{
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DoubleDouble result = left - right;
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result.High.ShouldBe(expected.High);
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result.Low.ShouldBe(expected.Low);
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result.ShouldBe(expected);
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}
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}
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