function testChaineHelloWorld() {
      $hw = 'Hello World';
      $this->assertTrue($hw == 'Hello World');

      $this->assertEqual($hw,'Hello World');
      $this->assertNotEqual($hw,'Hello Kitty');

      $this->assertPattern('/hello world/i', $hw);
      $this->assertNoPattern('/hello kitty/i', $hw);

      // ...
    }