chore: add test package before publishing

test/index.test.js

@@ -0,0 +1,27 @@
+const assert = require('assert');
+const ProgressBar = require('../src/progress-bar');
+
+describe('ProgressBar', function() {
+    describe('#getProgress()', function() {
+        it('should return 0 when no progress is set', function() {
+            const progressBar = new ProgressBar(100);
+            assert.strictEqual(progressBar.getProgress(), 0);
+        });
+
+        it('should return correct progress value', function() {
+            const progressBar = new ProgressBar(100);
+            progressBar.setProgress(50);
+            assert.strictEqual(progressBar.getProgress(), 50);
+        });
+
+        it('should throw an error for invalid progress value', function() {
+            const progressBar = new ProgressBar(100);
+            assert.throws(() => {
+                progressBar.setProgress(-1);
+            }, Error);
+            assert.throws(() => {
+                progressBar.setProgress(101);
+            }, Error);
+        });
+    });
+});