Index: tests/user/query.php
===================================================================
--- tests/user/query.php	(revision 0)
+++ tests/user/query.php	(revision 0)
@@ -0,0 +1,50 @@
+<?php
+/**
+ * Test WP_User Query, in wp-includes/user.php
+ *
+ * @group user
+ */
+class Tests_WP_User_Query extends WP_UnitTestCase {
+	
+	protected $user_id;
+	
+	function setUp() {
+		parent::setUp();
+
+		$this->user_id = $this->factory->user->create( array(
+			'role' => 'author'
+		) );
+	}
+	
+	function test_get_and_set() {
+		$users = new WP_User_Query();
+		
+		$users->set( 'fields', 'all' );
+		$this->assertEquals( $users->get( 'fields' ), 'all' );
+		
+		$users->set( 'fields', '' );
+		$this->assertEquals( $users->get( 'fields' ), '' );
+	}
+	
+	function test_include() {
+		$users = new WP_User_Query();
+		$users->set( 'fields', '' );
+		$users->set( 'include', $this->user_id );
+		$users->prepare_query();
+		$users->query();
+		
+		$ids = $users->get_results();
+		$this->assertTrue( in_array( $this->user_id, $ids ) );
+	}
+	
+	function test_exclude() {
+		$users = new WP_User_Query();
+		$users->set( 'fields', '' );
+		$users->set( 'exclude', $this->user_id );
+		$users->prepare_query();
+		$users->query();
+		
+		$ids = $users->get_results();
+		$this->assertTrue( empty( $ids ) || ! in_array( $this->user_id, $ids ) );
+	}
+}