Issue #3381194 by chike, jofitz: More modifiers for Drupal 9/10

src/Plugin/token_modifier/TitleCase.php

+<?php
+
+namespace Drupal\token_modifier\Plugin\token_modifier;
+
+use Drupal\token_modifier\Plugin\TokenModifierPluginBase;
+
+/**
+ * Makes the first characters of each word uppercase.
+ *
+ * @TokenModifier(
+ *   id = "title-case",
+ *   name = @Translation("Title case"),
+ *   description = @Translation("Uppercases the first letter of each word.")
+ * )
+ */
+class TitleCase extends TokenModifierPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function transform(string $text, array $data = [], array $options = []) {
+    return ucwords($this->token->replace($text, $data, $options));
+  }
+
+}

src/Plugin/token_modifier/UpperCase.php

+<?php
+
+namespace Drupal\token_modifier\Plugin\token_modifier;
+
+use Drupal\token_modifier\Plugin\TokenModifierPluginBase;
+
+/**
+ * Makes all characters of the string uppercase.
+ *
+ * @TokenModifier(
+ *   id = "uppercase",
+ *   name = @Translation("Upper case"),
+ *   description = @Translation("Uppercases all characters.")
+ * )
+ */
+class UpperCase extends TokenModifierPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function transform(string $text, array $data = [], array $options = []) {
+    return strtoupper($this->token->replace($text, $data, $options));
+  }
+
+}

tests/src/Unit/TitleCaseTest.php

+<?php
+
+namespace Drupal\Tests\token_modifier\Unit;
+
+use Drupal\token_modifier\Plugin\token_modifier\TitleCase;
+
+class TitleCaseTest extends TokenModifierTestCase {
+
+  /**
+   * Tests the Title Case token modifier.
+   *
+   * @param string $value
+   *   The source value for the modifier.
+   * @param string $expected
+   *   The expected result.
+   *
+   * @covers ::transform
+   *
+   * @dataProvider providerTestTransform
+   */
+  public function testTransform(string $value, string $expected) {
+    $plugin = new TitleCase([], 'title-case', [], $this->token);
+    $actual = $plugin->transform($value);
+    $this->assertSame($expected, $actual);
+  }
+
+  /**
+   * Provides data for testTransform.
+   */
+  public function providerTestTransform(): array {
+    $data['basic'] = ['hello world!', 'Hello World!'];
+    $data['already capitalised'] = ['It\'s Working?', 'It\'s Working?'];
+    $data['everything else capitalised'] = ['cAPITALISE eVERYTHING', 'CAPITALISE EVERYTHING'];
+    return $data;
+  }
+
+}

tests/src/Unit/UpperCaseTest.php

+<?php
+
+namespace Drupal\Tests\token_modifier\Unit;
+
+use Drupal\token_modifier\Plugin\token_modifier\UpperCase;
+
+class UpperCaseTest extends TokenModifierTestCase {
+
+  /**
+   * Tests the Upper Case token modifier.
+   *
+   * @param string $value
+   *   The source value for the modifier.
+   * @param string $expected
+   *   The expected result.
+   *
+   * @covers ::transform
+   *
+   * @dataProvider providerTestTransform
+   */
+  public function testTransform(string $value, string $expected) {
+    $plugin = new UpperCase([], 'uppercase', [], $this->token);
+    $actual = $plugin->transform($value);
+    $this->assertSame($expected, $actual);
+  }
+
+  /**
+   * Provides data for testTransform.
+   */
+  public function providerTestTransform(): array {
+    $data['basic'] = ['hello world!', 'HELLO WORLD!'];
+    $data['already capitalised'] = ['WORKING?', 'WORKING?'];
+    $data['camel case'] = ['cApItAlIsE', 'CAPITALISE'];
+    return $data;
+  }
+
+}