refactor: add more tests

Author: mdjastrzebski

src/constructs/__tests__/character-class.test.ts

@@ -169,3 +169,24 @@ test('`encodeCharacterClass` throws on empty text', () => {
     `"Character class should contain at least one character or character range"`,
   );
 });
+
+test('showcase: negated character classes', () => {
+  expect(notDigit).toEqualRegex(/\D/);
+  expect(notWord).toEqualRegex(/\W/);
+  expect(notWhitespace).toEqualRegex(/\S/);
+
+  expect(notDigit).toMatchString('A');
+  expect(notDigit).not.toMatchString('1');
+  expect(notDigit).toMatchString(' ');
+  expect(notDigit).toMatchString('#');
+
+  expect(notWord).not.toMatchString('A');
+  expect(notWord).not.toMatchString('1');
+  expect(notWord).toMatchString(' ');
+  expect(notWord).toMatchString('#');
+
+  expect(notWhitespace).toMatchString('A');
+  expect(notWhitespace).toMatchString('1');
+  expect(notWhitespace).not.toMatchString(' ');
+  expect(notWhitespace).toMatchString('#');
+});

src/constructs/__tests__/quantifiers.test.tsx

@@ -1,4 +1,5 @@
-import { digit } from '../character-class';
+import { buildRegExp } from '../../builders';
+import { any, digit } from '../character-class';
 import { oneOrMore, optional, zeroOrMore } from '../quantifiers';
 
 test('`oneOrMore` quantifier', () => {
@@ -59,3 +60,13 @@ test('non-greedy quantifiers', () => {
   expect(zeroOrMore('a', { greedy: false })).toEqualRegex(/a*?/);
   expect(zeroOrMore('ab', { greedy: false })).toEqualRegex(/(?:ab)*?/);
 });
+
+test('showcase: greedy vs non-greedy quantifiers', () => {
+  const html = '<div>Hello <em>World!</em></div>';
+
+  const greedyTag = buildRegExp(['<', oneOrMore(any), '>'], { global: true });
+  expect(greedyTag).toMatchGroups(html, ['<div>Hello <em>World!</em></div>']);
+
+  const nonGreedyTag = buildRegExp(['<', oneOrMore(any, { greedy: false }), '>'], { global: true });
+  expect(nonGreedyTag).toMatchGroups(html, ['<div>', '<em>', '</em>', '</div>']);
+});