refactor: tools folder inside pages

src/pages/tools/string/extract-substring/extract-substring.service.test.ts

@@ -0,0 +1,61 @@
+import { describe, expect, it } from 'vitest';
+import { extractSubstring } from './service';
+
+describe('extractSubstring', () => {
+  it('should extract a substring from single-line input', () => {
+    const input = 'hello world';
+    const result = extractSubstring(input, 1, 4, false, false);
+    expect(result).toBe('hell');
+  });
+
+  it('should extract and reverse a substring from single-line input', () => {
+    const input = 'hello world';
+    const result = extractSubstring(input, 1, 5, false, true);
+    expect(result).toBe('olleh');
+  });
+
+  it('should extract substrings from multi-line input', () => {
+    const input = 'hello\nworld';
+    const result = extractSubstring(input, 1, 5, true, false);
+    expect(result).toBe('hello\nworld');
+  });
+
+  it('should extract and reverse substrings from multi-line input', () => {
+    const input = 'hello\nworld';
+    const result = extractSubstring(input, 1, 4, true, true);
+    expect(result).toBe('lleh\nlrow');
+  });
+
+  it('should handle empty input', () => {
+    const input = '';
+    const result = extractSubstring(input, 1, 5, false, false);
+    expect(result).toBe('');
+  });
+
+  it('should handle start and length out of bounds', () => {
+    const input = 'hello';
+    const result = extractSubstring(input, 10, 5, false, false);
+    expect(result).toBe('');
+  });
+
+  it('should handle negative start and length', () => {
+    expect(() => extractSubstring('hello', -1, 5, false, false)).toThrow(
+      'Start index must be greater than zero.'
+    );
+    expect(() => extractSubstring('hello', 1, -5, false, false)).toThrow(
+      'Length value must be greater than or equal to zero.'
+    );
+  });
+
+  it('should handle zero length', () => {
+    const input = 'hello';
+    const result = extractSubstring(input, 1, 0, false, false);
+    expect(result).toBe('');
+  });
+
+  it('should work', () => {
+    const input = 'je me nomme king\n22 est mon chiffre';
+    const result = extractSubstring(input, 12, 7, true, false);
+    expect(result).toBe(' king\nchiffre');
+  });
+});