[azsdkcli] python test runner (#12558)

* create venv?

* this

* update to return a bool

* assume a pre-req is that the package and dev-reqs are installed

* revert

Author: l0lawrence

tools/azsdk-cli/Azure.Sdk.Tools.Cli/Services/ServiceRegistrations.cs

@@ -53,6 +53,7 @@ public static void RegisterCommonServices(IServiceCollection services, OutputHel
             services.AddLanguageSpecific<ITestRunner>(new LanguageSpecificImplementations
             {
                 JavaScript = typeof(JavaScriptTestRunner),
+                Python = typeof(PythonTestRunner),
             });
 
             // Helper classes

tools/azsdk-cli/Azure.Sdk.Tools.Cli/Services/Tests/PythonTestRunner.cs

@@ -0,0 +1,20 @@
+using Azure.Sdk.Tools.Cli.Helpers;
+using Azure.Sdk.Tools.Cli.Models;
+
+namespace Azure.Sdk.Tools.Cli.Services.Tests;
+
+public class PythonTestRunner(IProcessHelper processHelper) : ITestRunner
+{
+    public async Task<bool> RunAllTests(string packagePath, CancellationToken ct = default)
+    {
+        var result = await processHelper.Run(new ProcessOptions(
+                command: "pytest",
+                args: ["tests"],
+                workingDirectory: packagePath
+            ),
+            ct
+        );
+
+        return result.ExitCode == 0;
+    }
+}