[wasm][wbt] Test that dotnet.js could be run from any current directory (#69441)

In #72275 we fixed locateFile to deal with relative file path or URL. We could also handle absolute path/URL. This PR is adding tests to prove it works.

Author: yamachu

eng/testing/scenarios/BuildWasmAppsJobsList.txt

@@ -6,6 +6,7 @@ Wasm.Build.Tests.BlazorWasmBuildPublishTests
 Wasm.Build.Tests.BlazorWasmTests
 Wasm.Build.Tests.BuildPublishTests
 Wasm.Build.Tests.CleanTests
+Wasm.Build.Tests.ConfigSrcTests
 Wasm.Build.Tests.InvariantGlobalizationTests
 Wasm.Build.Tests.LocalEMSDKTests
 Wasm.Build.Tests.MainWithArgsTests
@@ -17,4 +18,5 @@ Wasm.Build.Tests.SatelliteAssembliesTests
 Wasm.Build.Tests.WasmBuildAppTest
 Wasm.Build.Tests.WasmNativeDefaultsTests
 Wasm.Build.Tests.WorkloadTests
+Wasm.Build.Tests.WasmRunOutOfAppBundleTests
 Wasm.Build.Tests.WasmTemplateTests

src/mono/wasm/test-main.js

@@ -166,6 +166,7 @@ function initRunArgs() {
     runArgs.enableGC = runArgs.enableGC === undefined ? true : runArgs.enableGC;
     runArgs.diagnosticTracing = runArgs.diagnosticTracing === undefined ? false : runArgs.diagnosticTracing;
     runArgs.debugging = runArgs.debugging === undefined ? false : runArgs.debugging;
+    runArgs.configSrc = runArgs.configSrc === undefined ? './mono-config.json' : runArgs.configSrc;
     // default'ing to true for tests, unless debugging
     runArgs.forwardConsole = runArgs.forwardConsole === undefined ? !runArgs.debugging : runArgs.forwardConsole;
 }
@@ -217,6 +218,9 @@ function processQueryArguments(incomingArguments) {
             } else {
                 console.warn("--fetch-random-delay only works on browser")
             }
+        } else if (currentArg.startsWith("--config-src=")) {
+            const arg = currentArg.substring("--config-src=".length);
+            runArgs.configSrc = arg;
         } else {
             break;
         }
@@ -355,7 +359,7 @@ Promise.all([argsPromise, loadDotnetPromise]).then(async ([_, createDotnetRuntim
     return createDotnetRuntime(({ MONO, INTERNAL, BINDING, IMPORTS, EXPORTS, Module }) => ({
         disableDotnet6Compatibility: true,
         config: null,
-        configSrc: "./mono-config.json",
+        configSrc: runArgs.configSrc || "./mono-config.json",
         onConfigLoaded: (config) => {
             if (!Module.config) {
                 const err = new Error("Could not find ./mono-config.json. Cancelling run");

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

@@ -130,11 +130,13 @@ protected string RunAndTestWasmApp(BuildArgs buildArgs,
                                            string id,
                                            Action<string>? test=null,
                                            string? buildDir = null,
+                                           string? bundleDir = null,
                                            int expectedExitCode = 0,
                                            string? args = null,
                                            Dictionary<string, string>? envVars = null,
                                            string targetFramework = DefaultTargetFramework,
-                                           string? extraXHarnessMonoArgs = null)
+                                           string? extraXHarnessMonoArgs = null,
+                                           string jsRelativePath = "test-main.js")
         {
             buildDir ??= _projectDir;
             envVars ??= new();
@@ -151,13 +153,13 @@ protected string RunAndTestWasmApp(BuildArgs buildArgs,
                     envVars[kvp.Key] = kvp.Value;
             }
 
-            string bundleDir = Path.Combine(GetBinDir(baseDir: buildDir, config: buildArgs.Config, targetFramework: targetFramework), "AppBundle");
+            bundleDir ??= Path.Combine(GetBinDir(baseDir: buildDir, config: buildArgs.Config, targetFramework: targetFramework), "AppBundle");
 
             // Use wasm-console.log to get the xharness output for non-browser cases
             (string testCommand, string extraXHarnessArgs, bool useWasmConsoleOutput) = host switch
             {
-                RunHost.V8     => ("wasm test", "--js-file=test-main.js --engine=V8 -v trace", true),
-                RunHost.NodeJS => ("wasm test", "--js-file=test-main.js --engine=NodeJS -v trace", true),
+                RunHost.V8     => ("wasm test", $"--js-file={jsRelativePath} --engine=V8 -v trace", true),
+                RunHost.NodeJS => ("wasm test", $"--js-file={jsRelativePath} --engine=NodeJS -v trace", true),
                 _              => ("wasm test-browser", $"-v trace -b {host} --web-server-use-cop", false)
             };
 

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

@@ -0,0 +1,37 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.IO;
+using Xunit;
+using Xunit.Abstractions;
+
+#nullable enable
+
+namespace Wasm.Build.Tests;
+
+public class ConfigSrcTests : BuildTestBase
+{
+    public ConfigSrcTests(ITestOutputHelper output, SharedBuildPerTestClassFixture buildContext) : base(output, buildContext)
+    {}
+
+    // NOTE: port number determinizes dynamically, so could not generate absolute URI
+    [Theory]
+    [BuildAndRun(host: RunHost.V8 | RunHost.NodeJS)]
+    public void ConfigSrcAbsolutePath(BuildArgs buildArgs, RunHost host, string id)
+    {
+        buildArgs = buildArgs with { ProjectName = $"configsrcabsolute_{buildArgs.Config}_{buildArgs.AOT}" };
+        buildArgs = ExpandBuildArgs(buildArgs);
+
+        BuildProject(buildArgs,
+                        id: id,
+                        new BuildProjectOptions(
+                            InitProject: () => File.WriteAllText(Path.Combine(_projectDir!, "Program.cs"), s_mainReturns42),
+                            DotnetWasmFromRuntimePack: !(buildArgs.AOT || buildArgs.Config == "Release")));
+
+        string binDir = GetBinDir(baseDir: _projectDir!, config: buildArgs.Config);
+        string bundleDir = Path.Combine(binDir, "AppBundle");
+        string configSrc = Path.GetFullPath(Path.Combine(bundleDir, "mono-config.json"));
+
+        RunAndTestWasmApp(buildArgs, expectedExitCode: 42, host: host, id: id, extraXHarnessMonoArgs: $"--config-src={configSrc}");
+    }
+}

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

@@ -0,0 +1,56 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.IO;
+using Xunit;
+using Xunit.Abstractions;
+
+#nullable enable
+
+namespace Wasm.Build.Tests;
+
+public class WasmRunOutOfAppBundleTests : BuildTestBase
+{
+    public WasmRunOutOfAppBundleTests(ITestOutputHelper output, SharedBuildPerTestClassFixture buildContext) : base(output, buildContext)
+    {}
+
+    [Theory]
+    [BuildAndRun]
+    public void RunOutOfAppBundle(BuildArgs buildArgs, RunHost host, string id)
+    {
+        buildArgs = buildArgs with { ProjectName = $"outofappbundle_{buildArgs.Config}_{buildArgs.AOT}" };
+        buildArgs = ExpandBuildArgs(buildArgs);
+
+        BuildProject(buildArgs,
+                        id: id,
+                        new BuildProjectOptions(
+                            InitProject: () => File.WriteAllText(Path.Combine(_projectDir!, "Program.cs"), s_mainReturns42),
+                            DotnetWasmFromRuntimePack: !(buildArgs.AOT || buildArgs.Config == "Release")));
+
+        string binDir = GetBinDir(baseDir: _projectDir!, config: buildArgs.Config);
+        string appBundleDir = Path.Combine(binDir, "AppBundle");
+        string outerDir = Path.GetFullPath(Path.Combine(appBundleDir, ".."));
+
+        if (host is RunHost.Chrome)
+        {
+            string indexHtmlPath = Path.Combine(appBundleDir, "index.html");
+            // Delete the original one, so we don't use that by accident
+            if (File.Exists(indexHtmlPath))
+                File.Delete(indexHtmlPath);
+
+            indexHtmlPath = Path.Combine(outerDir, "index.html");
+            if (!File.Exists(indexHtmlPath))
+            {
+                var html = @"<html><body><script type=""module"" src=""./AppBundle/test-main.js""></script></body></html>";
+                File.WriteAllText(indexHtmlPath, html);
+            }
+        }
+
+        RunAndTestWasmApp(buildArgs,
+                            expectedExitCode: 42,
+                            host: host,
+                            id: id,
+                            bundleDir: outerDir,
+                            jsRelativePath: "./AppBundle/test-main.js");
+    }
+}