silverstripe-framework/tests/control/HTTPCacheControlTest.php

<?php

/**
 * Testing of  HTTPCacheControl class
 */
class HTTPCacheControlTest extends SapphireTest
{
	public function testCachingPriorities()
	{
		$hcc = new HTTPCacheControl();
		$this->assertTrue($this->isDisabled($hcc), 'caching starts as disabled');

		$hcc->enableCache();
		$this->assertFalse($this->isDisabled($hcc));

		$hcc->publicCache();
		$this->assertTrue($this->isPublic($hcc), 'public can be set at start');

		$hcc->privateCache();
		$this->assertTrue($this->isPrivate($hcc), 'private overrides public');

		$hcc->publicCache();
		$this->assertFalse($this->isPublic($hcc), 'public does not overrides private');

		$hcc->disableCache();
		$this->assertTrue($this->isDisabled($hcc), 'disabled overrides private');

		$hcc->privateCache();
		$this->assertFalse($this->isPrivate($hcc), 'private does not override disabled');

		$hcc->enableCache(true);
		$this->assertFalse($this->isDisabled($hcc));

		$hcc->publicCache(true);
		$this->assertTrue($this->isPublic($hcc), 'force-public overrides disabled');

		$hcc->privateCache();
		$this->assertFalse($this->isPrivate($hcc), 'private does not overrdie force-public');

		$hcc->privateCache(true);
		$this->assertTrue($this->isPrivate($hcc), 'force-private overrides force-public');

		$hcc->publicCache(true);
		$this->assertFalse($this->isPublic($hcc), 'force-public does not override force-private');

		$hcc->disableCache(true);
		$this->assertTrue($this->isDisabled($hcc), 'force-disabled overrides force-private');

		$hcc->publicCache(true);
		$this->assertFalse($this->isPublic($hcc), 'force-public does not overrides force-disabled');
	}

	protected function isPrivate(HTTPCacheControl $hcc)
	{
		return $hcc->hasDirective('private') && !$hcc->hasDirective('public') && !$hcc->hasDirective('no-cache');
	}

	protected function isPublic(HTTPCacheControl $hcc)
	{
		return $hcc->hasDirective('public') && !$hcc->hasDirective('private') && !$hcc->hasDirective('no-cache');
	}
	protected function isDisabled(HTTPCacheControl $hcc)
	{
		return $hcc->hasDirective('no-cache') && !$hcc->hasDirective('private') && !$hcc->hasDirective('public');
	}
}