[release/9.2] Fix AE in ExecutableResource

src/Aspire.Hosting/ApplicationModel/ExecutableResource.cs

@@ -11,7 +11,7 @@ namespace Aspire.Hosting.ApplicationModel;
 /// </summary>
 /// <param name="name">The name of the resource.</param>
 /// <param name="command">The command to execute.</param>
-/// <param name="workingDirectory">The working directory of the executable.</param>
+/// <param name="workingDirectory">The working directory of the executable. Can be empty.</param>
 public class ExecutableResource(string name, string command, string workingDirectory)
     : Resource(name), IResourceWithEnvironment, IResourceWithArgs, IResourceWithEndpoints, IResourceWithWaitSupport
 {
@@ -23,7 +23,7 @@ public class ExecutableResource(string name, string command, string workingDirec
     /// <summary>
     /// Gets the working directory for the executable resource.
     /// </summary>
-    public string WorkingDirectory { get; } = ThrowIfNullOrEmpty(workingDirectory);
+    public string WorkingDirectory { get; } = workingDirectory ?? throw new ArgumentNullException(nameof(workingDirectory));
 
     private static string ThrowIfNullOrEmpty([NotNull] string? argument, [CallerArgumentExpression(nameof(argument))] string? paramName = null)
     {

tests/Aspire.Hosting.NodeJs.Tests/NodeJsPublicApiTests.cs

@@ -42,20 +42,16 @@ public void CtorNodeAppResourceShouldThrowWhenCommandIsNullOrEmpty(bool isNull)
         Assert.Equal(nameof(command), exception.ParamName);
     }
 
-    [Theory]
-    [InlineData(true)]
-    [InlineData(false)]
-    public void CtorNodeAppResourceShouldThrowWhenWorkingDirectoryIsNullOrEmpty(bool isNull)
+    [Fact]
+    public void CtorNodeAppResourceShouldThrowWhenWorkingDirectoryIsNull()
     {
         const string name = "NodeApp";
         const string command = "npm";
-        var workingDirectory = isNull ? null! : string.Empty;
+        string workingDirectory = null!;
 
         var action = () => new NodeAppResource(name, command, workingDirectory);
 
-        var exception = isNull
-            ? Assert.Throws<ArgumentNullException>(action)
-            : Assert.Throws<ArgumentException>(action);
+        var exception = Assert.Throws<ArgumentNullException>(action);
         Assert.Equal(nameof(workingDirectory), exception.ParamName);
     }
 
@@ -136,20 +132,16 @@ public void AddNpmAppShouldThrowWhenNameIsNullOrEmpty(bool isNull)
         Assert.Equal(nameof(name), exception.ParamName);
     }
 
-    [Theory]
-    [InlineData(true)]
-    [InlineData(false)]
-    public void AddNpmAppShouldThrowWhenWorkingDirectoryIsNullOrEmpty(bool isNull)
+    [Fact]
+    public void AddNpmAppShouldThrowWhenWorkingDirectoryIsNull()
     {
         var builder = TestDistributedApplicationBuilder.Create();
         const string name = "NpmApp";
-        var workingDirectory = isNull ? null! : string.Empty;
+        string workingDirectory = null!;
 
         var action = () => builder.AddNpmApp(name, workingDirectory);
 
-        var exception = isNull
-             ? Assert.Throws<ArgumentNullException>(action)
-             : Assert.Throws<ArgumentException>(action);
+        var exception = Assert.Throws<ArgumentNullException>(action);
         Assert.Equal(nameof(workingDirectory), exception.ParamName);
     }
 

tests/Aspire.Hosting.Python.Tests/PythonPublicApiTests.cs

@@ -42,20 +42,15 @@ public void CtorPythonAppResourceShouldThrowWhenExecutablePathIsNullOrEmpty(bool
         Assert.Equal("command", exception.ParamName);
     }
 
-    [Theory]
-    [InlineData(true)]
-    [InlineData(false)]
-    public void CtorPythonAppResourceShouldThrowWhenAppDirectoryIsNullOrEmpty(bool isNull)
+    [Fact]
+    public void CtorPythonAppResourceShouldThrowWhenAppDirectoryIsNull()
     {
         const string name = "Python";
         const string executablePath = "/src/python";
-        var appDirectory = isNull ? null! : string.Empty;
 
-        var action = () => new PythonAppResource(name, executablePath, appDirectory);
+        var action = () => new PythonAppResource(name, executablePath, appDirectory: null!);
 
-        var exception = isNull
-            ? Assert.Throws<ArgumentNullException>(action)
-            : Assert.Throws<ArgumentException>(action);
+        var exception = Assert.Throws<ArgumentNullException>(action);
         Assert.Equal("workingDirectory", exception.ParamName);
     }
 
@@ -379,21 +374,16 @@ public void CtorPythonProjectResourceShouldThrowWhenExecutablePathIsNullOrEmpty(
         Assert.Equal("command", exception.ParamName);
     }
 
-    [Theory]
-    [InlineData(true)]
-    [InlineData(false)]
+    [Fact]
     [Obsolete("PythonProjectResource is deprecated. Please use PythonAppResource instead.")]
-    public void CtorPythonProjectResourceShouldThrowWhenAppDirectoryIsNullOrEmpty(bool isNull)
+    public void CtorPythonProjectResourceShouldThrowWhenAppDirectoryIsNull()
     {
         const string name = "Python";
         const string executablePath = "/src/python";
-        var projectDirectory = isNull ? null! : string.Empty;
 
-        var action = () => new PythonProjectResource(name, executablePath, projectDirectory);
+        var action = () => new PythonProjectResource(name, executablePath, projectDirectory: null!);
 
-        var exception = isNull
-            ? Assert.Throws<ArgumentNullException>(action)
-            : Assert.Throws<ArgumentException>(action);
+        var exception = Assert.Throws<ArgumentNullException>(action);
         Assert.Equal("workingDirectory", exception.ParamName);
     }
 

tests/Aspire.Hosting.Tests/ExecutableResourceTests.cs

@@ -82,6 +82,25 @@ public async Task AddExecutableWithArgs()
         Assert.Equal(expectedManifest, manifest.ToString());
     }
 
+    [Fact]
+    public void ExecutableResourceNullCommand()
+        => Assert.Throws<ArgumentNullException>("command", () => new ExecutableResource("name", command: null!, workingDirectory: "."));
+
+    [Fact]
+    public void ExecutableResourceEmptyCommand()
+        => Assert.Throws<ArgumentException>("command", () => new ExecutableResource("name", command: "", workingDirectory: "."));
+
+    [Fact]
+    public void ExecutableResourceNullWorkingDirectory()
+        => Assert.Throws<ArgumentNullException>("workingDirectory", () => new ExecutableResource("name", command: "cmd", workingDirectory: null!));
+
+    [Fact]
+    public void ExecutableResourceEmptyWorkingDirectory()
+    {
+        var er = new ExecutableResource("name", command: "cmd", workingDirectory: "");
+        Assert.Empty(er.WorkingDirectory);
+    }
+
     private sealed class TestResource(string name, string connectionString) : Resource(name), IResourceWithConnectionString
     {
         public ReferenceExpression ConnectionStringExpression =>