test: added tests for task spawning

Author: gnikit

test/tools.test.ts

@@ -0,0 +1,19 @@
+import * as assert from 'assert';
+import { shellTask } from '../src/lib/tools';
+
+suite('Tools tests', () => {
+  test('shellTask returns correct output', async () => {
+    const name = 'pip: fortls';
+    const output = await shellTask(
+      'python3',
+      ['-m', 'pip', 'install', '--upgrade', '--force', 'fortls'],
+      name
+    );
+    assert.strictEqual(output, `${name}: shell task completed successfully.`);
+  });
+
+  test('shellTask returns rejected promise', async () => {
+    const name = 'pip: fortls';
+    assert.rejects(shellTask('python3', ['-m', 'pip', 'install', 'fortls2'], name));
+  });
+});