--- /dev/null
+<?php
+
+namespace Drupal\Tests\Core\Cache;
+
+use Drupal\Core\Cache\BackendChain;
+use Drupal\Core\Cache\Cache;
+use Drupal\Core\Cache\MemoryBackend;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * Unit test of backend chain implementation specifics.
+ *
+ * @group Cache
+ */
+class BackendChainImplementationUnitTest extends UnitTestCase {
+
+ /**
+ * Chain that will be heavily tested.
+ *
+ * @var \Drupal\Core\Cache\BackendChain
+ */
+ protected $chain;
+
+ /**
+ * First backend in the chain.
+ *
+ * @var \Drupal\Core\Cache\CacheBackendInterface
+ */
+ protected $firstBackend;
+
+ /**
+ * Second backend in the chain.
+ *
+ * @var \Drupal\Core\Cache\CacheBackendInterface
+ */
+ protected $secondBackend;
+
+ /**
+ * Third backend in the chain.
+ *
+ * @var \Drupal\Core\Cache\CacheBackendInterface
+ */
+ protected $thirdBackend;
+
+ protected function setUp() {
+ parent::setUp();
+
+ // Set up three memory backends to be used in the chain.
+ $this->firstBackend = new MemoryBackend();
+ $this->secondBackend = new MemoryBackend();
+ $this->thirdBackend = new MemoryBackend();
+
+ // Set an initial fixed dataset for all testing. The next three data
+ // collections will test two edge cases (last backend has the data, and
+ // first backend has the data) and will test a normal use case (middle
+ // backend has the data). We should have a complete unit test with those.
+ // Note that in all cases, when the same key is set on more than one
+ // backend, the values are voluntarily different, this ensures in which
+ // backend we actually fetched the key when doing get calls.
+
+ // Set a key present on all backends (for delete).
+ $this->firstBackend->set('t123', 1231);
+ $this->secondBackend->set('t123', 1232);
+ $this->thirdBackend->set('t123', 1233);
+
+ // Set a key present on the second and the third (for get), those two will
+ // be different, this will ensure from where we get the key.
+ $this->secondBackend->set('t23', 232);
+ $this->thirdBackend->set('t23', 233);
+
+ // Set a key on only the third, we will ensure propagation using this one.
+ $this->thirdBackend->set('t3', 33);
+
+ // Create the chain.
+ $this->chain = new BackendChain('foobarbaz');
+ $this->chain
+ ->appendBackend($this->firstBackend)
+ ->appendBackend($this->secondBackend)
+ ->appendBackend($this->thirdBackend);
+ }
+
+ /**
+ * Test the get feature.
+ */
+ public function testGet() {
+ $cached = $this->chain->get('t123');
+ $this->assertNotSame(FALSE, $cached, 'Got key that is on all backends');
+ $this->assertSame(1231, $cached->data, 'Got the key from the backend 1');
+
+ $cached = $this->chain->get('t23');
+ $this->assertNotSame(FALSE, $cached, 'Got key that is on backends 2 and 3');
+ $this->assertSame(232, $cached->data, 'Got the key from the backend 2');
+
+ $cached = $this->chain->get('t3');
+ $this->assertNotSame(FALSE, $cached, 'Got key that is on the backend 3');
+ $this->assertSame(33, $cached->data, 'Got the key from the backend 3');
+ }
+
+ /**
+ * Test the get multiple feature.
+ */
+ public function testGetMultiple() {
+ $cids = ['t123', 't23', 't3', 't4'];
+
+ $ret = $this->chain->getMultiple($cids);
+ $this->assertSame($ret['t123']->data, 1231, 'Got key 123 and value is from the first backend');
+ $this->assertSame($ret['t23']->data, 232, 'Got key 23 and value is from the second backend');
+ $this->assertSame($ret['t3']->data, 33, 'Got key 3 and value is from the third backend');
+ $this->assertFalse(array_key_exists('t4', $ret), "Didn't get the nonexistent key");
+
+ $this->assertFalse(in_array('t123', $cids), "Existing key 123 has been removed from &\$cids");
+ $this->assertFalse(in_array('t23', $cids), "Existing key 23 has been removed from &\$cids");
+ $this->assertFalse(in_array('t3', $cids), "Existing key 3 has been removed from &\$cids");
+ $this->assertTrue(in_array('t4', $cids), "Non existing key 4 is still in &\$cids");
+ }
+
+ /**
+ * Test that set will propagate.
+ */
+ public function testSet() {
+ $this->chain->set('test', 123);
+
+ $cached = $this->firstBackend->get('test');
+ $this->assertNotSame(FALSE, $cached, 'Test key is in the first backend');
+ $this->assertSame(123, $cached->data, 'Test key has the right value');
+
+ $cached = $this->secondBackend->get('test');
+ $this->assertNotSame(FALSE, $cached, 'Test key is in the second backend');
+ $this->assertSame(123, $cached->data, 'Test key has the right value');
+
+ $cached = $this->thirdBackend->get('test');
+ $this->assertNotSame(FALSE, $cached, 'Test key is in the third backend');
+ $this->assertSame(123, $cached->data, 'Test key has the right value');
+ }
+
+ /**
+ * Test that delete will propagate.
+ */
+ public function testDelete() {
+ $this->chain->set('test', 5);
+
+ $cached = $this->firstBackend->get('test');
+ $this->assertNotSame(FALSE, $cached, 'Test key has been added to the first backend');
+ $cached = $this->secondBackend->get('test');
+ $this->assertNotSame(FALSE, $cached, 'Test key has been added to the first backend');
+ $cached = $this->thirdBackend->get('test');
+ $this->assertNotSame(FALSE, $cached, 'Test key has been added to the first backend');
+
+ $this->chain->delete('test');
+
+ $cached = $this->firstBackend->get('test');
+ $this->assertSame(FALSE, $cached, 'Test key is removed from the first backend');
+ $cached = $this->secondBackend->get('test');
+ $this->assertSame(FALSE, $cached, 'Test key is removed from the second backend');
+ $cached = $this->thirdBackend->get('test');
+ $this->assertSame(FALSE, $cached, 'Test key is removed from the third backend');
+ }
+
+ /**
+ * Ensure get values propagation to previous backends.
+ */
+ public function testGetHasPropagated() {
+ $this->chain->get('t23');
+ $cached = $this->firstBackend->get('t23');
+ $this->assertNotSame(FALSE, $cached, 'Test 2 has been propagated to the first backend');
+
+ $this->chain->get('t3');
+ $cached = $this->firstBackend->get('t3');
+ $this->assertNotSame(FALSE, $cached, 'Test 3 has been propagated to the first backend');
+ $cached = $this->secondBackend->get('t3');
+ $this->assertNotSame(FALSE, $cached, 'Test 3 has been propagated to the second backend');
+ }
+
+ /**
+ * Ensure get multiple values propagation to previous backends.
+ */
+ public function testGetMultipleHasPropagated() {
+ $cids = ['t3', 't23'];
+ $this->chain->getMultiple($cids);
+
+ $cached = $this->firstBackend->get('t3');
+ $this->assertNotSame(FALSE, $cached, 'Test 3 has been propagated to the first backend');
+ $this->assertSame(33, $cached->data, 'And value has been kept');
+ $cached = $this->secondBackend->get('t3');
+ $this->assertNotSame(FALSE, $cached, 'Test 3 has been propagated to the second backend');
+ $this->assertSame(33, $cached->data, 'And value has been kept');
+
+ $cached = $this->firstBackend->get('t23');
+ $this->assertNotSame(FALSE, $cached, 'Test 2 has been propagated to the first backend');
+ $this->assertSame(232, $cached->data, 'And value has been kept');
+ }
+
+ /**
+ * Test that the delete all operation is propagated to all backends in the chain.
+ */
+ public function testDeleteAllPropagation() {
+ // Set both expiring and permanent keys.
+ $this->chain->set('test1', 1, Cache::PERMANENT);
+ $this->chain->set('test2', 3, time() + 1000);
+ $this->chain->deleteAll();
+
+ $this->assertFalse($this->firstBackend->get('test1'), 'First key has been deleted in first backend.');
+ $this->assertFalse($this->firstBackend->get('test2'), 'Second key has been deleted in first backend.');
+ $this->assertFalse($this->secondBackend->get('test1'), 'First key has been deleted in second backend.');
+ $this->assertFalse($this->secondBackend->get('test2'), 'Second key has been deleted in second backend.');
+ $this->assertFalse($this->thirdBackend->get('test1'), 'First key has been deleted in third backend.');
+ $this->assertFalse($this->thirdBackend->get('test2'), 'Second key has been deleted in third backend.');
+ }
+
+ /**
+ * Test that the delete tags operation is propagated to all backends
+ * in the chain.
+ */
+ public function testDeleteTagsPropagation() {
+ // Create two cache entries with the same tag and tag value.
+ $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, ['test_tag:2']);
+ $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, ['test_tag:2']);
+ $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
+ && $this->firstBackend->get('test_cid_clear2')
+ && $this->secondBackend->get('test_cid_clear1')
+ && $this->secondBackend->get('test_cid_clear2')
+ && $this->thirdBackend->get('test_cid_clear1')
+ && $this->thirdBackend->get('test_cid_clear2'),
+ 'Two cache items were created in all backends.');
+
+ // Invalidate test_tag of value 1. This should invalidate both entries.
+ $this->chain->invalidateTags(['test_tag:2']);
+ $this->assertSame(FALSE, $this->firstBackend->get('test_cid_clear1')
+ && $this->firstBackend->get('test_cid_clear2')
+ && $this->secondBackend->get('test_cid_clear1')
+ && $this->secondBackend->get('test_cid_clear2')
+ && $this->thirdBackend->get('test_cid_clear1')
+ && $this->thirdBackend->get('test_cid_clear2'),
+ 'Two caches removed from all backends after clearing a cache tag.');
+
+ // Create two cache entries with the same tag and an array tag value.
+ $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, ['test_tag:1']);
+ $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, ['test_tag:1']);
+ $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
+ && $this->firstBackend->get('test_cid_clear2')
+ && $this->secondBackend->get('test_cid_clear1')
+ && $this->secondBackend->get('test_cid_clear2')
+ && $this->thirdBackend->get('test_cid_clear1')
+ && $this->thirdBackend->get('test_cid_clear2'),
+ 'Two cache items were created in all backends.');
+
+ // Invalidate test_tag of value 1. This should invalidate both entries.
+ $this->chain->invalidateTags(['test_tag:1']);
+ $this->assertSame(FALSE, $this->firstBackend->get('test_cid_clear1')
+ && $this->firstBackend->get('test_cid_clear2')
+ && $this->secondBackend->get('test_cid_clear1')
+ && $this->secondBackend->get('test_cid_clear2')
+ && $this->thirdBackend->get('test_cid_clear1')
+ && $this->thirdBackend->get('test_cid_clear2'),
+ 'Two caches removed from all backends after clearing a cache tag.');
+
+ // Create three cache entries with a mix of tags and tag values.
+ $this->chain->set('test_cid_clear1', 'foo', Cache::PERMANENT, ['test_tag:1']);
+ $this->chain->set('test_cid_clear2', 'foo', Cache::PERMANENT, ['test_tag:2']);
+ $this->chain->set('test_cid_clear3', 'foo', Cache::PERMANENT, ['test_tag_foo:3']);
+ $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
+ && $this->firstBackend->get('test_cid_clear2')
+ && $this->firstBackend->get('test_cid_clear3')
+ && $this->secondBackend->get('test_cid_clear1')
+ && $this->secondBackend->get('test_cid_clear2')
+ && $this->secondBackend->get('test_cid_clear3')
+ && $this->thirdBackend->get('test_cid_clear1')
+ && $this->thirdBackend->get('test_cid_clear2')
+ && $this->thirdBackend->get('test_cid_clear3'),
+ 'Three cached items were created in all backends.');
+
+ $this->chain->invalidateTags(['test_tag_foo:3']);
+ $this->assertNotSame(FALSE, $this->firstBackend->get('test_cid_clear1')
+ && $this->firstBackend->get('test_cid_clear2')
+ && $this->secondBackend->get('test_cid_clear1')
+ && $this->secondBackend->get('test_cid_clear2')
+ && $this->thirdBackend->get('test_cid_clear1')
+ && $this->thirdBackend->get('test_cid_clear2'),
+ 'Cached items not matching the tag were not cleared from any of the backends.');
+
+ $this->assertSame(FALSE, $this->firstBackend->get('test_cid_clear3')
+ && $this->secondBackend->get('test_cid_clear3')
+ && $this->thirdBackend->get('test_cid_clear3'),
+ 'Cached item matching the tag was removed from all backends.');
+ }
+
+ /**
+ * Test that removing bin propagates to all backends.
+ */
+ public function testRemoveBin() {
+ $chain = new BackendChain('foo');
+ for ($i = 0; $i < 3; $i++) {
+ $backend = $this->getMock('Drupal\Core\Cache\CacheBackendInterface');
+ $backend->expects($this->once())->method('removeBin');
+ $chain->appendBackend($backend);
+ }
+
+ $chain->removeBin();
+ }
+
+}
projects / yaffs-website / blobdiff