Improved attachment retrieval and added test cases

tests/OfflineTests/ObjectRetrieverMockTest.php

@@ -115,6 +115,35 @@ class ObjectRetrieverMockTest extends \PHPUnit\Framework\TestCase {
         $this->assertNull($content);
     }
 
+    public function testWhenAPIThrowsErrorForAttachment() {
+        $this->setMockResponse(
+            new Response(200, ['Content-Type' => 'application/ld+json'],
+                '{"@id":"coid://cloudobjects.io/Test","coid://cloudobjects.io/isAtRevision":"1-abc"}'),
+            new Response(500)
+        );
+
+        $this->expectException(CoreAPIException::class);
+        $this->retriever->getAttachment(new IRI('coid://cloudobjects.io/Test'), 'file.txt');
+    }
+
+    public function testWhenAPITimesOutForAttachment() {
+        $this->setMockResponse(
+            new Response(200, ['Content-Type' => 'application/ld+json'],
+                '{"@id":"coid://cloudobjects.io/Test","coid://cloudobjects.io/isAtRevision":"1-abc"}'),
+            new ConnectException(
+                'cURL error 28: Operation timed out',
+                new Request('GET', 'cloudobjects.io')
+            )
+        );
+
+        try {
+            $this->retriever->getAttachment(new IRI('coid://cloudobjects.io/Test'), 'file.txt');
+            $this->fail('Expected CoreAPIException was not thrown.');
+        } catch (CoreAPIException $e) {
+            $this->assertInstanceOf(ConnectException::class, $e->getPrevious());
+        }
+    }
+
     private function createFallbackStoreDirectory() : string {
         $directory = sys_get_temp_dir().DIRECTORY_SEPARATOR.'clobj-fallback-'.uniqid();
         mkdir($directory);

tests/OnlineTests/ObjectRetrieverCacheTest.php

@@ -51,4 +51,34 @@ class ObjectRetrieverCacheTest extends \PHPUnit\Framework\TestCase {
         $this->assertEquals($object2->getRevision(), $object3->getRevision());
     }
 
+    public function testAttachmentCacheInRuntimeStorage() {
+        $cacheStorage = new VolatileRuntimeStorage;
+        $logger = new InMemoryLogger;
+
+        $coid = new IRI('coid://cloudobjects.io/Test');
+        $cacheId = (string)$coid.'#file.txt';
+
+        $retriever = new ObjectRetriever([
+            'cache_storage' => $cacheStorage,
+            'logger' => $logger
+        ]);
+
+        $content1 = $retriever->getAttachment($coid, 'file.txt');
+
+        $this->assertEquals('Test file content', trim($content1));
+        $this->assertNotNull($cacheStorage->fetch($retriever->getCacheKey($cacheId)));
+        $this->assertStringContainsString('from Core API', $logger->getLastLogMessage());
+
+        // Reinitialize retriever with same cache storage to verify that cache is used
+        $retriever = new ObjectRetriever([
+            'cache_storage' => $cacheStorage,
+            'logger' => $logger
+        ]);
+
+        $content2 = $retriever->getAttachment($coid, 'file.txt');
+
+        $this->assertEquals('Test file content', trim($content2));
+        $this->assertStringContainsString('from object cache', $logger->getLastLogMessage());
+    }
+
 }

tests/OnlineTests/ObjectRetrieverPublicTest.php

@@ -33,6 +33,15 @@ class ObjectRetrieverPublicTest extends \PHPUnit\Framework\TestCase {
         $this->assertEquals('CloudObjects', $object->getProperty('http://www.w3.org/2000/01/rdf-schema#label')->getValue());        
     }
 
+    public function testGetTestObject() {
+        $coid = new IRI('coid://cloudobjects.io/Test');
+        $object = $this->retriever->getObjectNode($coid);
+        $this->assertNotNull($object);
+        $this->assertEquals((string)$coid, $object->getId());
+        $this->assertNotNull($object->getProperty('http://www.w3.org/2000/01/rdf-schema#label'));
+        $this->assertEquals('Test Object', $object->getProperty('http://www.w3.org/2000/01/rdf-schema#label')->getValue());
+    }
+
     public function testGetRelatedObject() {
         $coid = new IRI('coid://cloudobjects.io');
         $object = $this->retriever->getCloudObject($coid);