QueueManager class tested

.gitignore

@@ -1,2 +1,3 @@
 /vendor
-composer.lock
+composer.lock
+coverage.clover

composer.json

@@ -22,6 +22,7 @@
         ]
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.8.0"
+        "phpunit/phpunit": "~4.8.0",
+        "10up/wp_mock": "0.2.0"
     }
 }

phpunit.xml

@@ -5,4 +5,12 @@
             <directory prefix="Test" suffix=".php">./tests</directory>
         </testsuite>
     </testsuites>
+    <filter>
+        <whitelist addUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src</directory>
+            <exclude>
+                <directory suffix=".php">./vendor</directory>
+            </exclude>
+        </whitelist>
+    </filter>
 </phpunit>

tests/TestQueueManager.php

@@ -0,0 +1,33 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+use WP_Queue\Exceptions\ConnectionNotFoundException;
+use WP_Queue\Queue;
+use WP_Queue\QueueManager;
+
+class TestQueueManager extends TestCase {
+
+	public function setUp() {
+		WP_Mock::setUp();
+
+		global $wpdb;
+		$wpdb = Mockery::mock( 'WPDB' );
+		$wpdb->prefix = 'wp_';
+	}
+
+	public function tearDown() {
+		WP_Mock::tearDown();
+	}
+
+	public function test_resolve() {
+		$queue = QueueManager::resolve( 'database' );
+		$this->assertInstanceOf( Queue::class, $queue );
+		$queue = QueueManager::resolve( 'database' );
+		$this->assertInstanceOf( Queue::class, $queue );
+	}
+
+	public function test_resolve_exception() {
+		$this->setExpectedException( ConnectionNotFoundException::class);
+		QueueManager::resolve( 'wibble' );
+	}
+}