feat(testcontainers#569): Support relative base directories other tha…

…n the working directory with WithDockerfileDirectory

CHANGELOG.md

@@ -11,7 +11,8 @@
 - 528 Do not require the Docker host configuration (`DockerEndpointAuthConfig`) on `TestcontainersSettings` initialization
 - 538 Support optional username and password in MongoDB connection string (@the-avid-engineer)
 - 540 Add Docker registry authentication provider for `DOCKER_AUTH_CONFIG` environment variable (@vova-lantsov-dev)
-- 541 Allow MsSqlTestcontainerConfiguration custom database names (@enginexon)
+- 541 Allow `MsSqlTestcontainerConfiguration` custom database names (@enginexon)
+- 558 Support relative base directories other than the working directory with `WithDockerfileDirectory`.
 
 ### Changed
 

src/Testcontainers/Builders/CommonDirectoryPath.cs

@@ -0,0 +1,124 @@
+namespace DotNet.Testcontainers.Builders
+{
+  using System;
+  using System.IO;
+  using System.Linq;
+  using System.Runtime.CompilerServices;
+  using JetBrains.Annotations;
+
+  /// <summary>
+  /// Resolves common directory paths.
+  /// </summary>
+  [PublicAPI]
+  public readonly struct CommonDirectoryPath
+  {
+    private static readonly string WorkingDirectoryPath = Directory.GetCurrentDirectory();
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="CommonDirectoryPath" /> struct.
+    /// </summary>
+    /// <param name="directoryPath">The directory path.</param>
+    [PublicAPI]
+    public CommonDirectoryPath(string directoryPath)
+    {
+      this.DirectoryPath = directoryPath;
+    }
+
+    /// <summary>
+    /// Gets the directory path.
+    /// </summary>
+    [PublicAPI]
+    public string DirectoryPath { get; }
+
+    /// <summary>
+    /// Resolves the first bin directory upwards the directory tree.
+    /// </summary>
+    /// <returns>The first bin directory upwards the directory tree.</returns>
+    /// <exception cref="DirectoryNotFoundException">Thrown when the bin directory was not found upwards the directory tree.</exception>
+    [PublicAPI]
+    public static CommonDirectoryPath GetBinDirectory()
+    {
+      var indexOfBinDirectory = WorkingDirectoryPath.LastIndexOf("bin", StringComparison.OrdinalIgnoreCase);
+
+      if (indexOfBinDirectory > -1)
+      {
+        return new CommonDirectoryPath(WorkingDirectoryPath.Substring(0, indexOfBinDirectory));
+      }
+
+      const string message = "Cannot find 'bin' and resolve the base directory in the directory tree.";
+      throw new DirectoryNotFoundException(message);
+    }
+
+    /// <summary>
+    /// Resolves the first Git directory upwards the directory tree.
+    /// </summary>
+    /// <remarks>
+    /// Start node is the caller file path directory. End node is the root directory.
+    /// </remarks>
+    /// <param name="filePath">The caller file path.</param>
+    /// <returns>The first Git directory upwards the directory tree.</returns>
+    /// <exception cref="DirectoryNotFoundException">Thrown when the Git directory was not found upwards the directory tree.</exception>
+    [PublicAPI]
+    public static CommonDirectoryPath GetGitDirectory([CallerFilePath, NotNull] string filePath = "")
+    {
+      return new CommonDirectoryPath(GetDirectoryPath(Path.GetDirectoryName(filePath), ".git"));
+    }
+
+    /// <summary>
+    /// Resolves the first Visual Studio solution file upwards the directory tree.
+    /// </summary>
+    /// <remarks>
+    /// Start node is the caller file path directory. End node is the root directory.
+    /// </remarks>
+    /// <param name="filePath">The caller file path.</param>
+    /// <returns>The first Visual Studio solution file upwards the directory tree.</returns>
+    /// <exception cref="DirectoryNotFoundException">Thrown when the Visual Studio solution file was not found upwards the directory tree.</exception>
+    [PublicAPI]
+    public static CommonDirectoryPath GetSolutionDirectory([CallerFilePath, NotNull] string filePath = "")
+    {
+      return new CommonDirectoryPath(GetDirectoryPath(Path.GetDirectoryName(filePath), "*.sln"));
+    }
+
+    /// <summary>
+    /// Resolves the first CSharp project file upwards the directory tree.
+    /// </summary>
+    /// <remarks>
+    /// Start node is the caller file path directory. End node is the root directory.
+    /// </remarks>
+    /// <param name="filePath">The caller file path.</param>
+    /// <returns>The first CSharp project file upwards the directory tree.</returns>
+    /// <exception cref="DirectoryNotFoundException">Thrown when the CSharp project file was not found upwards the directory tree.</exception>
+    [PublicAPI]
+    public static CommonDirectoryPath GetProjectDirectory([CallerFilePath, NotNull] string filePath = "")
+    {
+      return new CommonDirectoryPath(GetDirectoryPath(Path.GetDirectoryName(filePath), "*.csproj"));
+    }
+
+    /// <summary>
+    /// Resolves the caller file path directory.
+    /// </summary>
+    /// <param name="filePath">The caller file path.</param>
+    /// <returns>The caller file path directory.</returns>
+    [PublicAPI]
+    public static CommonDirectoryPath GetCallerFileDirectory([CallerFilePath, NotNull] string filePath = "")
+    {
+      return new CommonDirectoryPath(Path.GetDirectoryName(filePath));
+    }
+
+    private static string GetDirectoryPath(string path, string searchPattern)
+    {
+      return GetDirectoryPath(Directory.Exists(path) ? new DirectoryInfo(path) : null, searchPattern);
+    }
+
+    private static string GetDirectoryPath(DirectoryInfo path, string searchPattern)
+    {
+      if (path != null)
+      {
+        return path.EnumerateFileSystemInfos(searchPattern, SearchOption.TopDirectoryOnly).Any() ? path.FullName : GetDirectoryPath(path.Parent, searchPattern);
+      }
+
+      var message = $"Cannot find '{searchPattern}' and resolve the base directory in the directory tree.";
+      throw new DirectoryNotFoundException(message);
+    }
+  }
+}

src/Testcontainers/Builders/IImageFromDockerfileBuilder.cs

@@ -42,6 +42,15 @@ public interface IImageFromDockerfileBuilder : IAbstractBuilder<IImageFromDocker
     [PublicAPI]
     IImageFromDockerfileBuilder WithDockerfileDirectory(string dockerfileDirectory);
 
+    /// <summary>
+    /// Sets the base directory of the Dockerfile.
+    /// </summary>
+    /// <param name="commonDirectoryPath">Common directory path that contains the Dockerfile base directory.</param>
+    /// <param name="dockerfileDirectory">Dockerfile base directory.</param>
+    /// <returns>A configured instance of <see cref="IImageFromDockerfileBuilder" />.</returns>
+    [PublicAPI]
+    IImageFromDockerfileBuilder WithDockerfileDirectory(CommonDirectoryPath commonDirectoryPath, string dockerfileDirectory);
+
     /// <summary>
     /// If true, Testcontainer will remove the existing Docker image. Otherwise, Testcontainer will keep the Docker image.
     /// </summary>

src/Testcontainers/Builders/ImageFromDockerfileBuilder.cs

@@ -2,6 +2,7 @@ namespace DotNet.Testcontainers.Builders
 {
   using System;
   using System.Collections.Generic;
+  using System.IO;
   using System.Threading.Tasks;
   using DotNet.Testcontainers.Clients;
   using DotNet.Testcontainers.Configurations;
@@ -59,6 +60,13 @@ public IImageFromDockerfileBuilder WithDockerfileDirectory(string dockerfileDire
       return this.MergeNewConfiguration(new ImageFromDockerfileConfiguration(dockerfileDirectory: dockerfileDirectory));
     }
 
+    /// <inheritdoc />
+    public IImageFromDockerfileBuilder WithDockerfileDirectory(CommonDirectoryPath commonDirectoryPath, string dockerfileDirectory)
+    {
+      var baseDirectoryPath = Path.Combine(commonDirectoryPath.DirectoryPath, dockerfileDirectory);
+      return this.WithDockerfileDirectory(baseDirectoryPath);
+    }
+
     /// <inheritdoc />
     public IImageFromDockerfileBuilder WithDeleteIfExists(bool deleteIfExists)
     {

tests/Testcontainers.Tests/Unit/Builders/CommonDirectoryPathTest.cs

@@ -0,0 +1,35 @@
+namespace DotNet.Testcontainers.Tests.Unit
+{
+  using System;
+  using System.Collections.Generic;
+  using System.IO;
+  using DotNet.Testcontainers.Builders;
+  using Xunit;
+
+  public sealed class CommonDirectoryPathTest
+  {
+    public static IEnumerable<object[]> CommonDirectoryPaths { get; }
+      = new[]
+      {
+        new[] { (object)CommonDirectoryPath.GetBinDirectory() },
+        new[] { (object)CommonDirectoryPath.GetGitDirectory() },
+        new[] { (object)CommonDirectoryPath.GetProjectDirectory() },
+        new[] { (object)CommonDirectoryPath.GetSolutionDirectory() },
+        new[] { (object)CommonDirectoryPath.GetCallerFileDirectory() },
+      };
+
+    [Theory]
+    [MemberData(nameof(CommonDirectoryPaths))]
+    public void CommonDirectoryPathExists(CommonDirectoryPath commonDirectoryPath)
+    {
+      Assert.True(Directory.Exists(commonDirectoryPath.DirectoryPath));
+    }
+
+    [Fact]
+    public void CommonDirectoryPathNotExists()
+    {
+      var callerFilePath = Path.GetPathRoot(Directory.GetCurrentDirectory());
+      Assert.Throws<DirectoryNotFoundException>(() => CommonDirectoryPath.GetGitDirectory(callerFilePath));
+    }
+  }
+}