refactor: tools folder inside pages

src/pages/tools/string/reverse/reverse.service.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it } from 'vitest';
+import { stringReverser } from './service';
+
+describe('stringReverser', () => {
+  it('should reverse a single-line string', () => {
+    const input = 'hello world';
+    const result = stringReverser(input, false, false, false);
+    expect(result).toBe('dlrow olleh');
+  });
+
+  it('should reverse each line in a multi-line string', () => {
+    const input = 'hello\nworld';
+    const result = stringReverser(input, true, false, false);
+    expect(result).toBe('olleh\ndlrow');
+  });
+
+  it('should remove empty items if emptyItems is true', () => {
+    const input = 'hello\n\nworld';
+    const result = stringReverser(input, true, true, false);
+    expect(result).toBe('olleh\ndlrow');
+  });
+
+  it('should trim each line if trim is true', () => {
+    const input = '  hello  \n  world  ';
+    const result = stringReverser(input, true, false, true);
+    expect(result).toBe('olleh\ndlrow');
+  });
+
+  it('should handle empty input', () => {
+    const input = '';
+    const result = stringReverser(input, false, false, false);
+    expect(result).toBe('');
+  });
+
+  it('should handle a single line with emptyItems and trim', () => {
+    const input = '  hello world  ';
+    const result = stringReverser(input, false, true, true);
+    expect(result).toBe('dlrow olleh');
+  });
+
+  it('should handle a single line with emptyItems and non trim', () => {
+    const input = '  hello world  ';
+    const result = stringReverser(input, false, true, false);
+    expect(result).toBe('  dlrow olleh  ');
+  });
+
+  it('should handle a multi line with emptyItems and non trim', () => {
+    const input = '  hello\n\n\n\nworld  ';
+    const result = stringReverser(input, true, true, false);
+    expect(result).toBe('olleh  \n  dlrow');
+  });
+});