Get rid of xUnit fixtures

DiscordChatExporter.Cli.Tests/Fixtures/ExportWrapperCollection.cs

@@ -1,8 +0,0 @@
-using Xunit;
-
-namespace DiscordChatExporter.Cli.Tests.Fixtures;
-
-[CollectionDefinition(nameof(ExportWrapperCollection))]
-public class ExportWrapperCollection : ICollectionFixture<ExportWrapperFixture>
-{
-}

DiscordChatExporter.Cli.Tests/Fixtures/TempOutputFixture.cs

@@ -1,22 +0,0 @@
-using System;
-using System.IO;
-using DiscordChatExporter.Cli.Tests.Utils;
-
-namespace DiscordChatExporter.Cli.Tests.Fixtures;
-
-public class TempOutputFixture : IDisposable
-{
-    public string DirPath { get; } = Path.Combine(
-        Path.GetDirectoryName(typeof(TempOutputFixture).Assembly.Location) ?? Directory.GetCurrentDirectory(),
-        "Temp",
-        Guid.NewGuid().ToString()
-    );
-
-    public TempOutputFixture() => DirectoryEx.Reset(DirPath);
-
-    public string GetTempFilePath(string fileName) => Path.Combine(DirPath, fileName);
-
-    public string GetTempFilePath() => GetTempFilePath(Guid.NewGuid() + ".tmp");
-
-    public void Dispose() => DirectoryEx.DeleteIfExists(DirPath);
-}

DiscordChatExporter.Cli.Tests/Infra/ExportWrapper.cs

@@ -2,31 +2,34 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Reflection;
 using System.Text.Json;
 using System.Threading.Tasks;
 using AngleSharp.Dom;
 using AngleSharp.Html.Dom;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands;
-using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.Utils;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Exporting;
 using JsonExtensions;
 
-namespace DiscordChatExporter.Cli.Tests.Fixtures;
+namespace DiscordChatExporter.Cli.Tests.Infra;
 
-public class ExportWrapperFixture : IDisposable
+public static class ExportWrapper
 {
-    private string DirPath { get; } = Path.Combine(
-        Path.GetDirectoryName(typeof(ExportWrapperFixture).Assembly.Location) ?? Directory.GetCurrentDirectory(),
-        "ExportCache",
-        Guid.NewGuid().ToString()
+    private static readonly string DirPath = Path.Combine(
+        Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? Directory.GetCurrentDirectory(),
+        "ExportCache"
     );
 
-    public ExportWrapperFixture() => DirectoryEx.Reset(DirPath);
+    static ExportWrapper()
+    {
+        Directory.Delete(DirPath, true);
+        Directory.CreateDirectory(DirPath);
+    }
 
-    private async ValueTask<string> ExportAsync(Snowflake channelId, ExportFormat format)
+    private static async ValueTask<string> ExportAsync(Snowflake channelId, ExportFormat format)
     {
         var fileName = channelId.ToString() + '.' + format.GetFileExtension();
         var filePath = Path.Combine(DirPath, fileName);
@@ -55,32 +58,32 @@ public class ExportWrapperFixture : IDisposable
         return await File.ReadAllTextAsync(filePath);
     }
 
-    public async ValueTask<IHtmlDocument> ExportAsHtmlAsync(Snowflake channelId) => Html.Parse(
+    public static async ValueTask<IHtmlDocument> ExportAsHtmlAsync(Snowflake channelId) => Html.Parse(
         await ExportAsync(channelId, ExportFormat.HtmlDark)
     );
 
-    public async ValueTask<JsonElement> ExportAsJsonAsync(Snowflake channelId) => Json.Parse(
+    public static async ValueTask<JsonElement> ExportAsJsonAsync(Snowflake channelId) => Json.Parse(
         await ExportAsync(channelId, ExportFormat.Json)
     );
 
-    public async ValueTask<string> ExportAsPlainTextAsync(Snowflake channelId) =>
+    public static async ValueTask<string> ExportAsPlainTextAsync(Snowflake channelId) =>
         await ExportAsync(channelId, ExportFormat.PlainText);
 
-    public async ValueTask<string> ExportAsCsvAsync(Snowflake channelId) =>
+    public static async ValueTask<string> ExportAsCsvAsync(Snowflake channelId) =>
         await ExportAsync(channelId, ExportFormat.Csv);
 
-    public async ValueTask<IReadOnlyList<IElement>> GetMessagesAsHtmlAsync(Snowflake channelId) =>
+    public static async ValueTask<IReadOnlyList<IElement>> GetMessagesAsHtmlAsync(Snowflake channelId) =>
         (await ExportAsHtmlAsync(channelId))
         .QuerySelectorAll("[data-message-id]")
         .ToArray();
 
-    public async ValueTask<IReadOnlyList<JsonElement>> GetMessagesAsJsonAsync(Snowflake channelId) =>
+    public static async ValueTask<IReadOnlyList<JsonElement>> GetMessagesAsJsonAsync(Snowflake channelId) =>
         (await ExportAsJsonAsync(channelId))
         .GetProperty("messages")
         .EnumerateArray()
         .ToArray();
 
-    public async ValueTask<IElement> GetMessageAsHtmlAsync(Snowflake channelId, Snowflake messageId)
+    public static async ValueTask<IElement> GetMessageAsHtmlAsync(Snowflake channelId, Snowflake messageId)
     {
         var message = (await GetMessagesAsHtmlAsync(channelId))
             .SingleOrDefault(e =>
@@ -101,7 +104,7 @@ public class ExportWrapperFixture : IDisposable
         return message;
     }
 
-    public async ValueTask<JsonElement> GetMessageAsJsonAsync(Snowflake channelId, Snowflake messageId)
+    public static async ValueTask<JsonElement> GetMessageAsJsonAsync(Snowflake channelId, Snowflake messageId)
     {
         var message = (await GetMessagesAsJsonAsync(channelId))
             .SingleOrDefault(j =>
@@ -121,6 +124,4 @@ public class ExportWrapperFixture : IDisposable
 
         return message;
     }
-
-    public void Dispose() => DirectoryEx.DeleteIfExists(DirPath);
 }

DiscordChatExporter.Cli.Tests/Specs/CsvContentSpecs.cs

@@ -1,26 +1,18 @@
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using FluentAssertions;
 using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class CsvContentSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public CsvContentSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Messages_are_exported_correctly()
     {
         // Act
-        var document = await _exportWrapper.ExportAsCsvAsync(ChannelIds.DateRangeTestCases);
+        var document = await ExportWrapper.ExportAsCsvAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
         document.Should().ContainAll(

DiscordChatExporter.Cli.Tests/Specs/DateRangeSpecs.cs

@@ -4,9 +4,9 @@ using System.Linq;
 using System.Threading.Tasks;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands;
-using DiscordChatExporter.Cli.Tests.Fixtures;
 using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
+using DiscordChatExporter.Cli.Tests.Utils;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Exporting;
 using FluentAssertions;
@@ -15,22 +15,14 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
-public class DateRangeSpecs : IClassFixture<TempOutputFixture>
+public class DateRangeSpecs
 {
-    private readonly TempOutputFixture _tempOutput;
-
-    public DateRangeSpecs(TempOutputFixture tempOutput)
-    {
-        _tempOutput = tempOutput;
-    }
-
     [Fact]
     public async Task Messages_filtered_after_specific_date_only_include_messages_sent_after_that_date()
     {
         // Arrange
         var after = new DateTimeOffset(2021, 07, 24, 0, 0, 0, TimeSpan.Zero);
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -38,13 +30,13 @@ public class DateRangeSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.DateRangeTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             After = Snowflake.FromDate(after)
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         var timestamps = Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("timestamp").GetDateTimeOffset())
@@ -74,7 +66,7 @@ public class DateRangeSpecs : IClassFixture<TempOutputFixture>
     {
         // Arrange
         var before = new DateTimeOffset(2021, 07, 24, 0, 0, 0, TimeSpan.Zero);
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -82,13 +74,13 @@ public class DateRangeSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.DateRangeTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             Before = Snowflake.FromDate(before)
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         var timestamps = Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("timestamp").GetDateTimeOffset())
@@ -117,7 +109,7 @@ public class DateRangeSpecs : IClassFixture<TempOutputFixture>
         // Arrange
         var after = new DateTimeOffset(2021, 07, 24, 0, 0, 0, TimeSpan.Zero);
         var before = new DateTimeOffset(2021, 08, 01, 0, 0, 0, TimeSpan.Zero);
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -125,14 +117,14 @@ public class DateRangeSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.DateRangeTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             Before = Snowflake.FromDate(before),
             After = Snowflake.FromDate(after)
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         var timestamps = Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("timestamp").GetDateTimeOffset())

DiscordChatExporter.Cli.Tests/Specs/FilterSpecs.cs

@@ -3,9 +3,9 @@ using System.Linq;
 using System.Threading.Tasks;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands;
-using DiscordChatExporter.Cli.Tests.Fixtures;
 using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
+using DiscordChatExporter.Cli.Tests.Utils;
 using DiscordChatExporter.Core.Exporting;
 using DiscordChatExporter.Core.Exporting.Filtering;
 using FluentAssertions;
@@ -14,21 +14,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
-public class FilterSpecs : IClassFixture<TempOutputFixture>
+public class FilterSpecs
 {
-    private readonly TempOutputFixture _tempOutput;
-
-    public FilterSpecs(TempOutputFixture tempOutput)
-    {
-        _tempOutput = tempOutput;
-    }
-
     [Fact]
     public async Task Messages_filtered_by_text_only_include_messages_that_contain_that_text()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -36,13 +28,13 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.FilterTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             MessageFilter = MessageFilter.Parse("some text")
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
@@ -54,7 +46,7 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
     public async Task Messages_filtered_by_author_only_include_messages_sent_by_that_author()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -62,13 +54,13 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.FilterTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             MessageFilter = MessageFilter.Parse("from:Tyrrrz")
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("author").GetProperty("name").GetString())
@@ -80,7 +72,7 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
     public async Task Messages_filtered_by_content_only_include_messages_that_have_that_content()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -88,13 +80,13 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.FilterTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             MessageFilter = MessageFilter.Parse("has:image")
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
@@ -106,7 +98,7 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
     public async Task Messages_filtered_by_pin_only_include_messages_that_have_been_pinned()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -114,13 +106,13 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.FilterTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             MessageFilter = MessageFilter.Parse("has:pin")
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())
@@ -132,7 +124,7 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
     public async Task Messages_filtered_by_mention_only_include_messages_that_have_that_mention()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -140,13 +132,13 @@ public class FilterSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.FilterTestCases },
             ExportFormat = ExportFormat.Json,
-            OutputPath = filePath,
+            OutputPath = file.Path,
             MessageFilter = MessageFilter.Parse("mentions:Tyrrrz")
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
         Json
-            .Parse(await File.ReadAllTextAsync(filePath))
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .GetProperty("messages")
             .EnumerateArray()
             .Select(j => j.GetProperty("content").GetString())

DiscordChatExporter.Cli.Tests/Specs/HtmlAttachmentSpecs.cs

@@ -1,7 +1,7 @@
 using System.Linq;
 using System.Threading.Tasks;
 using AngleSharp.Dom;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -9,21 +9,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class HtmlAttachmentSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public HtmlAttachmentSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Message_with_a_generic_attachment_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885587844989612074")
         );
@@ -48,7 +40,7 @@ public class HtmlAttachmentSpecs
     public async Task Message_with_an_image_attachment_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885654862656843786")
         );
@@ -71,7 +63,7 @@ public class HtmlAttachmentSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/333
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885655761919836171")
         );
@@ -91,7 +83,7 @@ public class HtmlAttachmentSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/333
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885656175620808734")
         );

DiscordChatExporter.Cli.Tests/Specs/HtmlContentSpecs.cs

@@ -1,7 +1,7 @@
 using System.Linq;
 using System.Threading.Tasks;
 using AngleSharp.Dom;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -9,21 +9,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class HtmlContentSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public HtmlContentSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Messages_are_exported_correctly()
     {
         // Act
-        var messages = await _exportWrapper.GetMessagesAsHtmlAsync(ChannelIds.DateRangeTestCases);
+        var messages = await ExportWrapper.GetMessagesAsHtmlAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
         messages.Select(e => e.GetAttribute("data-message-id")).Should().Equal(
@@ -55,7 +47,7 @@ public class HtmlContentSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/633
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.ReplyTestCases,
             Snowflake.Parse("1072165330853576876")
         );

DiscordChatExporter.Cli.Tests/Specs/HtmlEmbedSpecs.cs

@@ -1,7 +1,7 @@
 using System.Linq;
 using System.Threading.Tasks;
 using AngleSharp.Dom;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -9,21 +9,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class HtmlEmbedSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public HtmlEmbedSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Message_with_an_embed_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("866769910729146400")
         );
@@ -46,7 +38,7 @@ public class HtmlEmbedSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/537
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("991768701126852638")
         );
@@ -66,7 +58,7 @@ public class HtmlEmbedSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/682
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("991768701126852638")
         );
@@ -80,7 +72,7 @@ public class HtmlEmbedSpecs
     public async Task Message_containing_a_gifv_link_is_rendered_with_a_video_embed()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("1019234520349814794")
         );
@@ -98,7 +90,7 @@ public class HtmlEmbedSpecs
     public async Task Message_containing_a_gifv_link_and_nothing_else_is_rendered_without_text_content()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("1019234520349814794")
         );
@@ -114,7 +106,7 @@ public class HtmlEmbedSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/657
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("867886632203976775")
         );
@@ -130,7 +122,7 @@ public class HtmlEmbedSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/570
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("866472508588294165")
         );
@@ -146,7 +138,7 @@ public class HtmlEmbedSpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/695
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("991757444017557665")
         );

DiscordChatExporter.Cli.Tests/Specs/HtmlGroupingSpecs.cs

@@ -4,32 +4,24 @@ using System.Threading.Tasks;
 using AngleSharp.Dom;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands;
-using DiscordChatExporter.Cli.Tests.Fixtures;
 using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
+using DiscordChatExporter.Cli.Tests.Utils;
 using DiscordChatExporter.Core.Exporting;
 using FluentAssertions;
 using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
-public class HtmlGroupingSpecs : IClassFixture<TempOutputFixture>
+public class HtmlGroupingSpecs
 {
-    private readonly TempOutputFixture _tempOutput;
-
-    public HtmlGroupingSpecs(TempOutputFixture tempOutput)
-    {
-        _tempOutput = tempOutput;
-    }
-
     [Fact]
     public async Task Messages_are_grouped_correctly()
     {
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/152
 
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
+        using var file = TempFile.Create();
 
         // Act
         await new ExportChannelsCommand
@@ -37,12 +29,12 @@ public class HtmlGroupingSpecs : IClassFixture<TempOutputFixture>
             Token = Secrets.DiscordToken,
             ChannelIds = new[] { ChannelIds.GroupingTestCases },
             ExportFormat = ExportFormat.HtmlDark,
-            OutputPath = filePath
+            OutputPath = file.Path
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        var messageGroups = Utils.Html
-            .Parse(await File.ReadAllTextAsync(filePath))
+        var messageGroups = Html
+            .Parse(await File.ReadAllTextAsync(file.Path))
             .QuerySelectorAll(".chatlog__message-group");
 
         messageGroups.Should().HaveCount(2);

DiscordChatExporter.Cli.Tests/Specs/HtmlMentionSpecs.cs

@@ -1,6 +1,6 @@
 using System.Threading.Tasks;
 using AngleSharp.Dom;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -8,21 +8,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class HtmlMentionSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public HtmlMentionSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task User_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866458840245076028")
         );
@@ -36,7 +28,7 @@ public class HtmlMentionSpecs
     public async Task Text_channel_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866459040480624680")
         );
@@ -49,7 +41,7 @@ public class HtmlMentionSpecs
     public async Task Voice_channel_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866459175462633503")
         );
@@ -62,7 +54,7 @@ public class HtmlMentionSpecs
     public async Task Role_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866459254693429258")
         );

DiscordChatExporter.Cli.Tests/Specs/HtmlReplySpecs.cs

@@ -1,6 +1,6 @@
 using System.Threading.Tasks;
 using AngleSharp.Dom;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -8,21 +8,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class HtmlReplySpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public HtmlReplySpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Reply_to_a_normal_message_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.ReplyTestCases,
             Snowflake.Parse("866460738239725598")
         );
@@ -38,7 +30,7 @@ public class HtmlReplySpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/645
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.ReplyTestCases,
             Snowflake.Parse("866460975388819486")
         );
@@ -56,7 +48,7 @@ public class HtmlReplySpecs
         // https://github.com/Tyrrrz/DiscordChatExporter/issues/634
 
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.ReplyTestCases,
             Snowflake.Parse("866462470335627294")
         );

DiscordChatExporter.Cli.Tests/Specs/HtmlStickerSpecs.cs

@@ -1,5 +1,5 @@
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -7,21 +7,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class HtmlStickerSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public HtmlStickerSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Message_with_a_PNG_based_sticker_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.StickerTestCases,
             Snowflake.Parse("939670623158943754")
         );
@@ -35,7 +27,7 @@ public class HtmlStickerSpecs
     public async Task Message_with_a_Lottie_based_sticker_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsHtmlAsync(
+        var message = await ExportWrapper.GetMessageAsHtmlAsync(
             ChannelIds.StickerTestCases,
             Snowflake.Parse("939670526517997590")
         );

DiscordChatExporter.Cli.Tests/Specs/JsonAttachmentSpecs.cs

@@ -1,6 +1,6 @@
 using System.Linq;
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -8,21 +8,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class JsonAttachmentSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public JsonAttachmentSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Message_with_a_generic_attachment_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885587844989612074")
         );
@@ -43,7 +35,7 @@ public class JsonAttachmentSpecs
     public async Task Message_with_an_image_attachment_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885654862656843786")
         );
@@ -64,7 +56,7 @@ public class JsonAttachmentSpecs
     public async Task Message_with_a_video_attachment_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885655761919836171")
         );
@@ -85,7 +77,7 @@ public class JsonAttachmentSpecs
     public async Task Message_with_an_audio_attachment_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.AttachmentTestCases,
             Snowflake.Parse("885656175620808734")
         );

DiscordChatExporter.Cli.Tests/Specs/JsonContentSpecs.cs

@@ -1,27 +1,19 @@
 using System.Linq;
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using FluentAssertions;
 using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class JsonContentSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public JsonContentSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Messages_are_exported_correctly()
     {
         // Act
-        var messages = await _exportWrapper.GetMessagesAsJsonAsync(ChannelIds.DateRangeTestCases);
+        var messages = await ExportWrapper.GetMessagesAsJsonAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
         messages.Select(j => j.GetProperty("id").GetString()).Should().Equal(

DiscordChatExporter.Cli.Tests/Specs/JsonEmbedSpecs.cs

@@ -1,6 +1,6 @@
 using System.Linq;
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -8,21 +8,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class JsonEmbedSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public JsonEmbedSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Message_with_an_embed_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.EmbedTestCases,
             Snowflake.Parse("866769910729146400")
         );

DiscordChatExporter.Cli.Tests/Specs/JsonMentionSpecs.cs

@@ -1,6 +1,6 @@
 using System.Linq;
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -8,21 +8,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class JsonMentionSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public JsonMentionSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task User_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866458840245076028")
         );
@@ -42,7 +34,7 @@ public class JsonMentionSpecs
     public async Task Text_channel_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866459040480624680")
         );
@@ -55,7 +47,7 @@ public class JsonMentionSpecs
     public async Task Voice_channel_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866459175462633503")
         );
@@ -68,7 +60,7 @@ public class JsonMentionSpecs
     public async Task Role_mention_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.MentionTestCases,
             Snowflake.Parse("866459254693429258")
         );

DiscordChatExporter.Cli.Tests/Specs/JsonStickerSpecs.cs

@@ -1,6 +1,6 @@
 using System.Linq;
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Core.Discord;
 using FluentAssertions;
@@ -8,21 +8,13 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class JsonStickerSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public JsonStickerSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Message_with_a_PNG_based_sticker_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.StickerTestCases,
             Snowflake.Parse("939670623158943754")
         );
@@ -43,7 +35,7 @@ public class JsonStickerSpecs
     public async Task Message_with_a_Lottie_based_sticker_is_rendered_correctly()
     {
         // Act
-        var message = await _exportWrapper.GetMessageAsJsonAsync(
+        var message = await ExportWrapper.GetMessageAsJsonAsync(
             ChannelIds.StickerTestCases,
             Snowflake.Parse("939670526517997590")
         );

DiscordChatExporter.Cli.Tests/Specs/PartitioningSpecs.cs

@@ -2,9 +2,9 @@
 using System.Threading.Tasks;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands;
-using DiscordChatExporter.Cli.Tests.Fixtures;
 using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
+using DiscordChatExporter.Cli.Tests.Utils;
 using DiscordChatExporter.Core.Exporting;
 using DiscordChatExporter.Core.Exporting.Partitioning;
 using FluentAssertions;
@@ -12,23 +12,14 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
-public class PartitioningSpecs : IClassFixture<TempOutputFixture>
+public class PartitioningSpecs
 {
-    private readonly TempOutputFixture _tempOutput;
-
-    public PartitioningSpecs(TempOutputFixture tempOutput)
-    {
-        _tempOutput = tempOutput;
-    }
-
     [Fact]
     public async Task Messages_partitioned_by_count_are_split_into_a_corresponding_number_of_files()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
-        var fileNameWithoutExt = Path.GetFileNameWithoutExtension(filePath);
-        var dirPath = Path.GetDirectoryName(filePath) ?? Directory.GetCurrentDirectory();
+        using var dir = TempDir.Create();
+        var filePath = Path.Combine(dir.Path, "output.html");
 
         // Act
         await new ExportChannelsCommand
@@ -41,7 +32,7 @@ public class PartitioningSpecs : IClassFixture<TempOutputFixture>
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Directory.EnumerateFiles(dirPath, fileNameWithoutExt + "*")
+        Directory.EnumerateFiles(dir.Path, "output*")
             .Should()
             .HaveCount(3);
     }
@@ -50,9 +41,8 @@ public class PartitioningSpecs : IClassFixture<TempOutputFixture>
     public async Task Messages_partitioned_by_file_size_are_split_into_a_corresponding_number_of_files()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
-        var fileNameWithoutExt = Path.GetFileNameWithoutExtension(filePath);
-        var dirPath = Path.GetDirectoryName(filePath) ?? Directory.GetCurrentDirectory();
+        using var dir = TempDir.Create();
+        var filePath = Path.Combine(dir.Path, "output.html");
 
         // Act
         await new ExportChannelsCommand
@@ -65,7 +55,7 @@ public class PartitioningSpecs : IClassFixture<TempOutputFixture>
         }.ExecuteAsync(new FakeConsole());
 
         // Assert
-        Directory.EnumerateFiles(dirPath, fileNameWithoutExt + "*")
+        Directory.EnumerateFiles(dir.Path, "output*")
             .Should()
             .HaveCount(8);
     }

DiscordChatExporter.Cli.Tests/Specs/PlainTextContentSpecs.cs

@@ -1,26 +1,18 @@
 using System.Threading.Tasks;
-using DiscordChatExporter.Cli.Tests.Fixtures;
+using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using FluentAssertions;
 using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
 public class PlainTextContentSpecs
 {
-    private readonly ExportWrapperFixture _exportWrapper;
-
-    public PlainTextContentSpecs(ExportWrapperFixture exportWrapper)
-    {
-        _exportWrapper = exportWrapper;
-    }
-
     [Fact]
     public async Task Messages_are_exported_correctly()
     {
         // Act
-        var document = await _exportWrapper.ExportAsPlainTextAsync(ChannelIds.DateRangeTestCases);
+        var document = await ExportWrapper.ExportAsPlainTextAsync(ChannelIds.DateRangeTestCases);
 
         // Assert
         document.Should().ContainAll(

DiscordChatExporter.Cli.Tests/Specs/SelfContainedSpecs.cs

@@ -3,7 +3,6 @@ using System.Linq;
 using System.Threading.Tasks;
 using CliFx.Infrastructure;
 using DiscordChatExporter.Cli.Commands;
-using DiscordChatExporter.Cli.Tests.Fixtures;
 using DiscordChatExporter.Cli.Tests.Infra;
 using DiscordChatExporter.Cli.Tests.TestData;
 using DiscordChatExporter.Cli.Tests.Utils;
@@ -13,22 +12,14 @@ using Xunit;
 
 namespace DiscordChatExporter.Cli.Tests.Specs;
 
-[Collection(nameof(ExportWrapperCollection))]
-public class SelfContainedSpecs : IClassFixture<TempOutputFixture>
+public class SelfContainedSpecs
 {
-    private readonly TempOutputFixture _tempOutput;
-
-    public SelfContainedSpecs(TempOutputFixture tempOutput)
-    {
-        _tempOutput = tempOutput;
-    }
-
     [Fact]
     public async Task Messages_in_self_contained_export_only_reference_local_file_resources()
     {
         // Arrange
-        var filePath = _tempOutput.GetTempFilePath();
-        var dirPath = Path.GetDirectoryName(filePath) ?? Directory.GetCurrentDirectory();
+        using var dir = TempDir.Create();
+        var filePath = Path.Combine(dir.Path, "output.html");
 
         // Act
         await new ExportChannelsCommand
@@ -45,7 +36,7 @@ public class SelfContainedSpecs : IClassFixture<TempOutputFixture>
             .Parse(await File.ReadAllTextAsync(filePath))
             .QuerySelectorAll("body [src]")
             .Select(e => e.GetAttribute("src")!)
-            .Select(f => Path.GetFullPath(f, dirPath))
+            .Select(f => Path.GetFullPath(f, dir.Path))
             .All(File.Exists)
             .Should()
             .BeTrue();

DiscordChatExporter.Cli.Tests/Utils/DirectoryEx.cs

@@ -1,23 +0,0 @@
-using System.IO;
-
-namespace DiscordChatExporter.Cli.Tests.Utils;
-
-internal static class DirectoryEx
-{
-    public static void DeleteIfExists(string dirPath, bool recursive = true)
-    {
-        try
-        {
-            Directory.Delete(dirPath, recursive);
-        }
-        catch (DirectoryNotFoundException)
-        {
-        }
-    }
-
-    public static void Reset(string dirPath)
-    {
-        DeleteIfExists(dirPath);
-        Directory.CreateDirectory(dirPath);
-    }
-}

DiscordChatExporter.Cli.Tests/Utils/TempDir.cs

@@ -0,0 +1,41 @@
+using System;
+using System.IO;
+using System.Reflection;
+using PathEx = System.IO.Path;
+
+namespace DiscordChatExporter.Cli.Tests.Utils;
+
+internal partial class TempDir : IDisposable
+{
+    public string Path { get; }
+
+    public TempDir(string path) =>
+        Path = path;
+
+    public void Dispose()
+    {
+        try
+        {
+            Directory.Delete(Path, true);
+        }
+        catch (DirectoryNotFoundException)
+        {
+        }
+    }
+}
+
+internal partial class TempDir
+{
+    public static TempDir Create()
+    {
+        var dirPath = PathEx.Combine(
+            PathEx.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? Directory.GetCurrentDirectory(),
+            "Temp",
+            Guid.NewGuid().ToString()
+        );
+
+        Directory.CreateDirectory(dirPath);
+
+        return new TempDir(dirPath);
+    }
+}

DiscordChatExporter.Cli.Tests/Utils/TempFile.cs

@@ -0,0 +1,45 @@
+using System;
+using System.IO;
+using System.Reflection;
+using PathEx = System.IO.Path;
+
+namespace DiscordChatExporter.Cli.Tests.Utils;
+
+internal partial class TempFile : IDisposable
+{
+    public string Path { get; }
+
+    public TempFile(string path) =>
+        Path = path;
+
+    public void Dispose()
+    {
+        try
+        {
+            File.Delete(Path);
+        }
+        catch (FileNotFoundException)
+        {
+        }
+    }
+}
+
+internal partial class TempFile
+{
+    public static TempFile Create()
+    {
+        var dirPath = PathEx.Combine(
+            PathEx.GetDirectoryName(Assembly.GetExecutingAssembly().Location) ?? Directory.GetCurrentDirectory(),
+            "Temp"
+        );
+
+        Directory.CreateDirectory(dirPath);
+
+        var filePath = PathEx.Combine(
+            dirPath,
+            Guid.NewGuid() + ".tmp"
+        );
+
+        return new TempFile(filePath);
+    }
+}

DiscordChatExporter.Cli.Tests/xunit.runner.json

@@ -1,6 +1,5 @@
 {
   "$schema": "https://xunit.net/schema/current/xunit.runner.schema.json",
   "methodDisplayOptions": "all",
-  "methodDisplay": "method",
-  "parallelizeTestCollections": true
+  "methodDisplay": "method"
 }

DiscordChatExporter.Core/Exporting/ChannelExporter.cs

@@ -50,7 +50,7 @@ public class ChannelExporter
         {
             cancellationToken.ThrowIfCancellationRequested();
 
-            // Skips any messages that fail to pass the supplied filter
+            // Skip messages that fail to pass the supplied filter
             if (!request.MessageFilter.IsMatch(message))
                 continue;
 

DiscordChatExporter.Core/Exporting/ExportAssetDownloader.cs

@@ -78,13 +78,11 @@ internal partial class ExportAssetDownloader
 
 internal partial class ExportAssetDownloader
 {
-    private static string GetUrlHash(string url)
-    {
-        using var hash = SHA256.Create();
-
-        var data = hash.ComputeHash(Encoding.UTF8.GetBytes(url));
-        return data.ToHex().Truncate(5); // 5 chars ought to be enough for anybody
-    }
+    private static string GetUrlHash(string url) => SHA256
+        .HashData(Encoding.UTF8.GetBytes(url))
+        .ToHex()
+        // 5 chars ought to be enough for anybody
+        .Truncate(5);
 
     private static string GetFileNameFromUrl(string url)
     {

DiscordChatExporter.Core/Exporting/MessageExporter.cs

@@ -26,7 +26,7 @@ internal partial class MessageExporter : IAsyncDisposable
             {
                 await _writer.WritePostambleAsync(cancellationToken);
             }
-            // Writer must be disposed, even if writing postamble fails
+            // Writer must be disposed, even if it fails to write the postamble
             finally
             {
                 await _writer.DisposeAsync();
@@ -45,16 +45,13 @@ internal partial class MessageExporter : IAsyncDisposable
             _partitionIndex++;
         }
 
-        // Writer is still valid - return
+        // Writer is still valid, return
         if (_writer is not null)
             return _writer;
 
+        Directory.CreateDirectory(_context.Request.OutputBaseDirPath);
         var filePath = GetPartitionFilePath(_context.Request.OutputBaseFilePath, _partitionIndex);
 
-        var dirPath = Path.GetDirectoryName(_context.Request.OutputBaseFilePath);
-        if (!string.IsNullOrWhiteSpace(dirPath))
-            Directory.CreateDirectory(dirPath);
-
         var writer = CreateMessageWriter(filePath, _context.Request.Format, _context);
         await writer.WritePreambleAsync(cancellationToken);
 
@@ -74,7 +71,7 @@ internal partial class MessageExporter
 {
     private static string GetPartitionFilePath(string baseFilePath, int partitionIndex)
     {
-        // First partition - don't change file name
+        // First partition, don't change file name
         if (partitionIndex <= 0)
             return baseFilePath;
 
@@ -92,19 +89,14 @@ internal partial class MessageExporter
     private static MessageWriter CreateMessageWriter(
         string filePath,
         ExportFormat format,
-        ExportContext context)
-    {
-        // Stream will be disposed by the underlying writer
-        var stream = File.Create(filePath);
-
-        return format switch
+        ExportContext context) =>
+        format switch
         {
-            ExportFormat.PlainText => new PlainTextMessageWriter(stream, context),
-            ExportFormat.Csv => new CsvMessageWriter(stream, context),
-            ExportFormat.HtmlDark => new HtmlMessageWriter(stream, context, "Dark"),
-            ExportFormat.HtmlLight => new HtmlMessageWriter(stream, context, "Light"),
-            ExportFormat.Json => new JsonMessageWriter(stream, context),
+            ExportFormat.PlainText => new PlainTextMessageWriter(File.Create(filePath), context),
+            ExportFormat.Csv => new CsvMessageWriter(File.Create(filePath), context),
+            ExportFormat.HtmlDark => new HtmlMessageWriter(File.Create(filePath), context, "Dark"),
+            ExportFormat.HtmlLight => new HtmlMessageWriter(File.Create(filePath), context, "Light"),
+            ExportFormat.Json => new JsonMessageWriter(File.Create(filePath), context),
             _ => throw new ArgumentOutOfRangeException(nameof(format), $"Unknown export format '{format}'.")
         };
-    }
 }

DiscordChatExporter.Core/Utils/Extensions/BinaryExtensions.cs

@@ -6,12 +6,10 @@ public static class BinaryExtensions
 {
     public static string ToHex(this byte[] data)
     {
-        var buffer = new StringBuilder();
+        var buffer = new StringBuilder(2 * data.Length);
 
         foreach (var t in data)
-        {
             buffer.Append(t.ToString("X2"));
-        }
 
         return buffer.ToString();
     }