Canonical: Add tests for trailing slashes for robots.txt.

See #48025.

Props Toro_Unit, joostdevalk, SergeyBiryukov.


git-svn-id: https://develop.svn.wordpress.org/trunk@48155 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/canonical/robots.php

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * @group canonical
+ * @group rewrite
+ * @group query
+ */
+class Tests_Canonical_Robots extends WP_Canonical_UnitTestCase {
+
+	function setUp() {
+		parent::setUp();
+	}
+
+	function test_robots_url() {
+		$this->set_permalink_structure( '/%year%/%monthnum%/%day%/%postname%/' );
+		$this->assertCanonical( '/robots.txt', '/robots.txt' );
+		$this->assertCanonical( '/robots.txt/', '/robots.txt' );
+	}
+
+}