DefaultFormatTest.php

<?php

namespace Drupal\FunctionalTests\Routing;

use Drupal\Tests\BrowserTestBase;

/**
 * @group routing
 */
class DefaultFormatTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'default_format_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    public function testFoo() {
        $this->drupalGet('/default_format_test/human');
        $this->assertSame('format:html', $this->getSession()
            ->getPage()
            ->getContent());
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
        $this->drupalGet('/default_format_test/human');
        $this->assertSame('format:html', $this->getSession()
            ->getPage()
            ->getContent());
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
        $this->drupalGet('/default_format_test/machine');
        $this->assertSame('format:json', $this->getSession()
            ->getPage()
            ->getContent());
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'MISS');
        $this->drupalGet('/default_format_test/machine');
        $this->assertSame('format:json', $this->getSession()
            ->getPage()
            ->getContent());
        $this->assertSession()
            ->responseHeaderEquals('X-Drupal-Cache', 'HIT');
    }
    public function testMultipleRoutesWithSameSingleFormat() {
        $this->drupalGet('/default_format_test/machine');
        $this->assertSame('format:json', $this->getSession()
            ->getPage()
            ->getContent());
    }

}