wp/tests/phpunit/tests/includes/factory.php

<?php

class TestFactoryFor extends WP_UnitTestCase {
	function setUp() {
		parent::setUp();
		$this->category_factory = new WP_UnitTest_Factory_For_Term( null, 'category' );
	}

	function test_create_creates_a_category() {
		$id = $this->category_factory->create();
		$this->assertTrue( (bool)get_term_by( 'id', $id, 'category' ) );
	}

	function test_get_object_by_id_gets_an_object() {
		$id = $this->category_factory->create();
		$this->assertTrue( (bool)$this->category_factory->get_object_by_id( $id ) );
	}

	function test_get_object_by_id_gets_an_object_with_the_same_name() {
		$id = $this->category_factory->create( array( 'name' => 'Boo') );
		$object = $this->category_factory->get_object_by_id( $id );
		$this->assertEquals( 'Boo', $object->name );
	}

	function test_the_taxonomy_argument_overrules_the_factory_taxonomy() {
		$term_factory = new WP_UnitTest_Factory_For_term( null, 'category' );
		$id = $term_factory->create( array( 'taxonomy' => 'post_tag' ) );
		$term = get_term( $id, 'post_tag' );
		$this->assertEquals( $id, $term->term_id );
	}
}