wp/tests/phpunit/tests/option/transient.php

<?php

/**
 * @group option
 */
class Tests_Option_Transient extends WP_UnitTestCase {

	function test_the_basics() {
		$key = rand_str();
		$value = rand_str();
		$value2 = rand_str();

		$this->assertFalse( get_transient( 'doesnotexist' ) );
		$this->assertTrue( set_transient( $key, $value ) );
		$this->assertEquals( $value, get_transient( $key ) );
		$this->assertFalse( set_transient( $key, $value ) );
		$this->assertTrue( set_transient( $key, $value2 ) );
		$this->assertEquals( $value2, get_transient( $key ) );
		$this->assertTrue( delete_transient( $key ) );
		$this->assertFalse( get_transient( $key ) );
		$this->assertFalse( delete_transient( $key ) );
	}

	function test_serialized_data() {
		$key = rand_str();
		$value = array( 'foo' => true, 'bar' => true );

		$this->assertTrue( set_transient( $key, $value ) );
		$this->assertEquals( $value, get_transient( $key ) );

		$value = (object) $value;
		$this->assertTrue( set_transient( $key, $value ) );
		$this->assertEquals( $value, get_transient( $key ) );
		$this->assertTrue( delete_transient( $key ) );
	}
}