add missing unit test suite

tests/stack-name-normalize.test.ts

@@ -0,0 +1,36 @@
+import { describe, test, expect } from 'bun:test';
+import { normalizeStackName } from '../src/lib/utils/stack-name';
+
+describe('normalizeStackName', () => {
+	test('lowercases uppercase names', () => {
+		expect(normalizeStackName('Test')).toBe('test');
+		expect(normalizeStackName('MyStack')).toBe('mystack');
+		expect(normalizeStackName('ALLCAPS')).toBe('allcaps');
+	});
+
+	test('replaces invalid characters with hyphens', () => {
+		expect(normalizeStackName('my stack')).toBe('my-stack');
+		expect(normalizeStackName('my.stack.name')).toBe('my-stack-name');
+		expect(normalizeStackName('stack@home!')).toBe('stack-home');
+	});
+
+	test('collapses multiple hyphens', () => {
+		expect(normalizeStackName('my--stack')).toBe('my-stack');
+		expect(normalizeStackName('a - b - c')).toBe('a-b-c');
+	});
+
+	test('trims leading and trailing hyphens', () => {
+		expect(normalizeStackName('-stack-')).toBe('stack');
+		expect(normalizeStackName('--stack--')).toBe('stack');
+	});
+
+	test('preserves underscores and digits', () => {
+		expect(normalizeStackName('my_stack_2')).toBe('my_stack_2');
+		expect(normalizeStackName('app123')).toBe('app123');
+	});
+
+	test('handles mixed cases from directory names', () => {
+		expect(normalizeStackName('My Docker Stack')).toBe('my-docker-stack');
+		expect(normalizeStackName('Production_App.v2')).toBe('production_app-v2');
+	});
+});