src/goTestExplorer: support VSCode 1.58

package.json

@@ -87,7 +87,7 @@
     "yarn": "^1.22.4"
   },
   "engines": {
-    "vscode": "^1.59.0"
+    "vscode": "^1.58.0"
   },
   "activationEvents": [
     "workspaceContains:**/*.go",
@@ -1291,7 +1291,10 @@
         },
         "go.testExplorerPackages": {
           "type": "string",
-          "enum": ["flat", "nested"],
+          "enum": [
+            "flat",
+            "nested"
+          ],
           "default": "flat",
           "description": "Control whether packages are presented flat or nested",
           "scope": "resource"

src/goMain.ts

@@ -114,7 +114,7 @@ import { getFormatTool } from './goFormat';
 import { resetSurveyConfig, showSurveyConfig, timeMinute } from './goSurvey';
 import { ExtensionAPI } from './export';
 import extensionAPI from './extensionAPI';
-import { TestExplorer } from './goTestExplorer';
+import { isVscodeTestingAPIAvailable, TestExplorer } from './goTestExplorer';
 
 export let buildDiagnosticCollection: vscode.DiagnosticCollection;
 export let lintDiagnosticCollection: vscode.DiagnosticCollection;
@@ -336,13 +336,15 @@ If you would like additional configuration for diagnostics from gopls, please se
 		})
 	);
 
-	const testExplorer = TestExplorer.setup(ctx);
+	if (isVscodeTestingAPIAvailable) {
+		const testExplorer = TestExplorer.setup(ctx);
 
-	ctx.subscriptions.push(
-		vscode.commands.registerCommand('go.test.refresh', (args) => {
-			if (args) testExplorer.resolve(args);
-		})
-	);
+		ctx.subscriptions.push(
+			vscode.commands.registerCommand('go.test.refresh', (args) => {
+				if (args) testExplorer.resolve(args);
+			})
+		);
+	}
 
 	ctx.subscriptions.push(
 		vscode.commands.registerCommand('go.subtest.cursor', (args) => {

src/goTestExplorer.ts

@@ -36,6 +36,11 @@ import { getGoConfig } from './config';
 import { getTestFlags, goTest, GoTestOutput } from './testUtils';
 import { outputChannel } from './goStatus';
 
+// Set true only if the Testing API is available (VSCode version >= 1.59).
+export const isVscodeTestingAPIAvailable =
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	'object' === typeof (vscode as any).tests && 'function' === typeof (vscode as any).tests.createTestController;
+
 // eslint-disable-next-line @typescript-eslint/no-namespace
 export namespace TestExplorer {
 	// exported for tests
@@ -86,6 +91,8 @@ async function doSafe<T>(context: string, p: Thenable<T> | (() => T | Thenable<T
 
 export class TestExplorer {
 	static setup(context: ExtensionContext): TestExplorer {
+		if (!isVscodeTestingAPIAvailable) throw new Error('VSCode Testing API is unavailable');
+
 		const ctrl = vscode.tests.createTestController('go', 'Go');
 		const getSym = new GoDocumentSymbolProvider().provideDocumentSymbols;
 		const inst = new this(ctrl, workspace, getSym);