Index: tests/phpunit/tests/functions/maybe-unserialize.php
===================================================================
--- tests/phpunit/tests/functions/maybe-unserialize.php	(nonexistent)
+++ tests/phpunit/tests/functions/maybe-unserialize.php	(working copy)
@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * @group functions.php
+ */
+class Tests_Functions_maybe_unserialize extends WP_UnitTestCase {
+	public function data_maybe_unserialize() {
+		global $wp;
+
+		return array(
+			array( 'a string', serialize( 'a string' ), 'pass a serialized string' ),
+			array( 'a string', 'a string', 'pass a string' ),
+			array(
+				array(
+					'start' => 1454803200,
+					'end'   => 1455407999,
+				),
+				serialize( array(
+					'start' => 1454803200,
+					'end'   => 1455407999,
+				) ),
+				'pass serialized array',
+			),
+			array(
+				array(
+					'start' => 1454803200,
+					'end'   => 1455407999,
+				),
+				array(
+					'start' => 1454803200,
+					'end'   => 1455407999,
+				),
+				'pass array',
+			),
+			array( $wp, serialize( $wp ), 'pass a serialized object' ),
+			array( $wp, $wp, 'pass a object' ),
+			array( true, serialize( true ), 'pass a serialized bool' ),
+			array( true, true, 'pass a bool' ),
+			array( 99, serialize( 99 ), 'pass a serialized int' ),
+			array( 99, 99, 'pass a int' )
+
+		);
+
+	}
+
+	/**
+	 * @dataProvider data_maybe_unserialize
+	 * @covers ::maybe_unserialize
+	 *
+	 * @param $expected
+	 * @param $data
+	 * @param $message
+	 */
+	public function test_maybe_unserialize_pass_serialized( $expected, $data, $message ) {
+		$this->assertEquals( $expected, maybe_unserialize( $data ), $message );
+	}
+}