[wasm] Return int from console template (#72623)

Also update the template tests to test that it propagates correctly as
an exit code from the node process.

Author: radekdoulik

src/mono/wasm/templates/templates/console/Program.cs

@@ -3,6 +3,8 @@
 
 Console.WriteLine("Hello, Console!");
 
+return 0;
+
 public partial class MyClass
 {
     [JSExport]

src/mono/wasm/templates/templates/console/app-support.mjs

@@ -166,7 +166,7 @@ try {
             if (runArgs.runtimeArgs.length > 0)
                 INTERNAL.mono_wasm_set_runtime_options(runArgs.runtimeArgs);
 
-            Object.assign(App, { MONO, BINDING, IMPORTS, Module, runArgs });
+            Object.assign(App, { MONO, INTERNAL, BINDING, IMPORTS, Module, runArgs });
 
             try {
                 if (App.main) {

src/mono/wasm/templates/templates/console/main.mjs

@@ -12,5 +12,5 @@ App.main = async function (applicationArguments) {
     const text = exports.MyClass.Greeting();
     console.log(text);
 
-    await App.MONO.mono_run_main("console.0.dll", applicationArguments);
+    return await App.MONO.mono_run_main("console.0.dll", applicationArguments);
 }

src/tests/BuildWasmApps/Wasm.Build.Tests/WasmTemplateTests.cs

@@ -3,14 +3,11 @@
 
 using System;
 using System.IO;
-using System.Text;
 using System.Threading.Tasks;
-using System.Text.RegularExpressions;
 using Xunit;
 using Xunit.Abstractions;
 using Xunit.Sdk;
 
-
 #nullable enable
 
 namespace Wasm.Build.Tests
@@ -32,6 +29,7 @@ private void updateProgramCS() {
             var path = Path.Combine(_projectDir!, "Program.cs");
             string text = File.ReadAllText(path);
             text = text.Replace(@"Console.WriteLine(""Hello, Console!"");", programText);
+            text = text.Replace("return 0;", "return 42;");
             File.WriteAllText(path, text);
         }
 
@@ -162,7 +160,7 @@ public void ConsoleBuildAndRun(string config)
             AssertDotNetJsSymbols(Path.Combine(GetBinDir(config), "AppBundle"), fromRuntimePack: true);
 
             (int exitCode, string output) = RunProcess(s_buildEnv.DotNet, _testOutput, args: $"run --no-build -c {config} x y z", workingDir: _projectDir);
-            Assert.Equal(0, exitCode);
+            Assert.Equal(42, exitCode);
             Assert.Contains("args[0] = x", output);
             Assert.Contains("args[1] = y", output);
             Assert.Contains("args[2] = z", output);
@@ -209,7 +207,7 @@ public void ConsolePublishAndRun(string config, bool aot)
             var res = new RunCommand(s_buildEnv, _testOutput, label: id)
                                 .WithWorkingDirectory(_projectDir!)
                                 .ExecuteWithCapturedOutput(runArgs)
-                                .EnsureSuccessful();
+                                .EnsureExitCode(42);
 
             if (aot)
                 Assert.Contains($"AOT: image '{Path.GetFileNameWithoutExtension(projectFile)}' found", res.Output);