Produce JSON report for archiving by build jobs (#1132)

* Produce JSON report for archiving by build jobs

* Want to be able to archive some results as part of build jobs

* Fix formatting

Author: award999

.gitignore

@@ -1,6 +1,7 @@
 out
 dist
 coverage
+test-results
 node_modules
 default.profraw
 *.vsix

.mocha-reporter.js

@@ -0,0 +1,33 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the VS Code Swift open source project
+//
+// Copyright (c) 2024 the VS Code Swift project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of VS Code Swift project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+const BaseReporter = require("mocha/lib/reporters/base");
+const SpecReporter = require("mocha/lib/reporters/spec");
+const JsonReporter = require("mocha/lib/reporters/json");
+
+// Taking inspiration from https://github.com/stanleyhlng/mocha-multi-reporters/issues/108#issuecomment-2028773686
+// since mocha-multi-reporters seems to have bugs with newer mocha versions
+module.exports = class MultiReporter extends BaseReporter {
+    constructor(runner, options) {
+        super(runner, options);
+        this.reporters = [
+            new SpecReporter(runner, {
+                reporterOption: options.reporterOption.specReporterOptions,
+            }),
+            new JsonReporter(runner, {
+                reporterOption: options.reporterOption.jsonReporterOptions,
+            }),
+        ];
+    }
+};

.vscode-test.js

@@ -13,6 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 const { defineConfig } = require("@vscode/test-cli");
+const path = require("path");
 
 const isCIBuild = process.env["CI"] === "1";
 const isFastTestRun = process.env["FAST_TEST_RUN"] === "1";
@@ -44,6 +45,12 @@ module.exports = defineConfig({
                 grep: isFastTestRun ? "@slow" : undefined,
                 invert: isFastTestRun,
                 slow: 10000,
+                reporter: path.join(__dirname, ".mocha-reporter.js"),
+                reporterOptions: {
+                    jsonReporterOptions: {
+                        output: path.join(__dirname, "test-results", "integration-tests.json"),
+                    },
+                },
             },
             reuseMachineInstall: !isCIBuild,
         },
@@ -64,6 +71,12 @@ module.exports = defineConfig({
                 timeout,
                 forbidOnly: isCIBuild,
                 slow: 100,
+                reporter: path.join(__dirname, ".mocha-reporter.js"),
+                reporterOptions: {
+                    jsonReporterOptions: {
+                        output: path.join(__dirname, "test-results", "unit-tests.json"),
+                    },
+                },
             },
             reuseMachineInstall: !isCIBuild,
         },