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test/suite/extensions.test.ts

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+// Import the Mocha test framework
+import * as Mocha from 'mocha';
+// Import Node.js path module to handle file paths
+import * as path from 'path';
+// Import the glob module to find test files
+import { glob } from 'glob';
+// Import the run function from your test runner
+import { run } from './index'; 
+
+// Define a Mocha test suite
+suite('Extension Test Suite', () => {
+    // A test case within the suite
+    test('Sample Test', () => {
+        // Example assertion using Chai or Node's assert
+        const expected = -1;
+        const actual = [1, 2, 3].indexOf(4);
+        if (actual !== expected) {
+            throw new Error(`Expected indexOf(4) to be ${expected}, but got ${actual}`);
+        }
+    });
+
+    // You can add more tests here or import them from other files
+});
+
+
+
+

test/suite/index.ts

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+import * as path from 'path';
+import * as Mocha from 'mocha';
+import { glob } from 'glob';
+
+export async function run(): Promise<void> {
+  const mocha = new Mocha({
+    ui: 'bdd',
+    color: true,
+  });
+
+  const testsRoot = path.resolve(__dirname);
+
+  try {
+    const files = await glob('**/*.test.js', { cwd: testsRoot });
+
+    files.forEach((f) => mocha.addFile(path.resolve(testsRoot, f)));
+
+    await new Promise<void>((resolve, reject) => {
+      mocha.run((failures) => {
+        if (failures > 0) {
+          reject(new Error(`${failures} tests failed.`));
+        } else {
+          resolve();
+        }
+      });
+    });
+  } catch (err) {
+    return Promise.reject(err);
+  }
+}