31 lines
937 B
C#
31 lines
937 B
C#
using FluentAssertions;
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using Xunit;
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namespace PerfectNumbers.Core.Tests;
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[Trait("Category", "Fast")]
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public class MersenneResidueModeTests
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{
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[Fact]
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public void IsMersennePrime_residue_mode_rejects_composite_exponent()
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{
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var tester = new MersenneNumberTester(useResidue: true, useIncremental: false);
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tester.IsMersennePrime(136_000_002UL).Should().BeFalse();
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}
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[Fact]
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public void IsMersennePrime_residue_mode_accepts_prime_exponent()
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{
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var tester = new MersenneNumberTester(useResidue: true, useIncremental: true, maxK: 1_000UL);
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tester.IsMersennePrime(31UL).Should().BeTrue();
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}
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[Fact]
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public void IsMersennePrime_residue_mode_accepts_prime_exponent_when_scanning_multiple_batches()
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{
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var tester = new MersenneNumberTester(useResidue: true, useIncremental: true, maxK: 2_100_000UL);
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tester.IsMersennePrime(31UL).Should().BeTrue();
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}
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}
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