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| 1 | +using System; |
| 2 | +using System.IO; |
| 3 | +using Xunit; |
| 4 | + |
| 5 | +namespace RamGenerator.Tests |
| 6 | +{ |
| 7 | + public class RamGeneratorFixture : IDisposable |
| 8 | + { |
| 9 | + public int RamSizeInMB { get; set; } = 1_000; |
| 10 | + public RamGenerator RamGenerator { get; private set; } |
| 11 | + |
| 12 | + public RamGeneratorFixture() |
| 13 | + { |
| 14 | + RamGenerator = new RamGenerator(RamSizeInMB); |
| 15 | + RamGenerator.GenerateRam(); |
| 16 | + } |
| 17 | + |
| 18 | + public void Dispose() |
| 19 | + { |
| 20 | + var filename = "ram*.dat"; |
| 21 | + var dir = new DirectoryInfo(AppDomain.CurrentDomain.BaseDirectory); |
| 22 | + var files = dir.GetFiles(filename); |
| 23 | + |
| 24 | + foreach (var file in files) |
| 25 | + { |
| 26 | + File.Delete(file.FullName); |
| 27 | + } |
| 28 | + } |
| 29 | + } |
| 30 | + |
| 31 | + public class RamGeneratorTests : IClassFixture<RamGeneratorFixture> |
| 32 | + { |
| 33 | + readonly RamGeneratorFixture fixture; |
| 34 | + |
| 35 | + public RamGeneratorTests(RamGeneratorFixture fixture) |
| 36 | + { |
| 37 | + this.fixture = fixture; |
| 38 | + } |
| 39 | + |
| 40 | + [Fact] |
| 41 | + public void Generating_RAM_File() |
| 42 | + { |
| 43 | + var expectedNumberOfRamInstances = 1; |
| 44 | + var filename = "ram*.dat"; |
| 45 | + var actualNumberOfRamInstances = Directory.GetFiles(AppDomain.CurrentDomain.BaseDirectory, filename).Length; |
| 46 | + |
| 47 | + Assert.Equal(expectedNumberOfRamInstances, actualNumberOfRamInstances); |
| 48 | + } |
| 49 | + |
| 50 | + [Fact] |
| 51 | + public void Generating_RAM_File_Twice() |
| 52 | + { |
| 53 | + fixture.RamGenerator.GenerateRam(); |
| 54 | + var filename = "ram*.dat"; |
| 55 | + var expectedNumberOfRamInstances = 1; |
| 56 | + var actualNumberOfRamInstances = Directory.GetFiles(AppDomain.CurrentDomain.BaseDirectory, filename).Length; |
| 57 | + |
| 58 | + Assert.Equal(expectedNumberOfRamInstances, actualNumberOfRamInstances); |
| 59 | + } |
| 60 | + |
| 61 | + [Fact] |
| 62 | + public void Checking_RAM_File_Size() |
| 63 | + { |
| 64 | + var ramSize = new FileInfo(fixture.RamGenerator.FileName).Length; |
| 65 | + |
| 66 | + var blockSize = 1024 * 8; |
| 67 | + var blocksPerMb = 1_024 * 1_024 / blockSize; |
| 68 | + var calculatedRamSize = blocksPerMb * fixture.RamSizeInMB * blockSize; |
| 69 | + |
| 70 | + Assert.Equal(calculatedRamSize, ramSize); |
| 71 | + } |
| 72 | + |
| 73 | + |
| 74 | + } |
| 75 | +} |
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