Built/Test tools, HTTP API: Refactor test for multiple location headers.

Remove wordpress.org as an external dependency testing `WP_HTTP::handle_redirects()`.

This refactors and reenables an existing test to call the `WP_HTTP::handle_redirects()` method directly with a mocked array of HTTP headers containing multiple location headers.

The test is moved from the external-http group to the http test group as it no longer makes an HTTP request.

Follow up to [54955].

Props SergeyBiryukov, dd32, peterwilsoncc.
Merges [54968] to the 5.1 branch.
Fixes #57306.
See #56793.



git-svn-id: https://develop.svn.wordpress.org/branches/5.1@54984 602fd350-edb4-49c9-b593-d223f7449a82

Author: peterwilsoncc

tests/phpunit/tests/http/base.php

@@ -393,26 +393,6 @@ function test_https_url_without_ssl_verification() {
 		$this->assertNotWPError( $res );
 	}
 
-	/**
-	 * Test HTTP Redirects with multiple Location headers specified
-	 *
-	 * @ticket 16890
-	 */
-	function test_multiple_location_headers() {
-		$url = 'http://api.wordpress.org/core/tests/1.0/redirection.php?multiple-location-headers=1';
-		$res = wp_remote_head( $url, array( 'timeout' => 30 ) );
-
-		$this->skipTestOnTimeout( $res );
-		$this->assertInternalType( 'array', wp_remote_retrieve_header( $res, 'location' ) );
-		$this->assertCount( 2, wp_remote_retrieve_header( $res, 'location' ) );
-
-		$res = wp_remote_get( $url, array( 'timeout' => 30 ) );
-
-		$this->skipTestOnTimeout( $res );
-		$this->assertEquals( 'PASS', wp_remote_retrieve_body( $res ) );
-
-	}
-
 	/**
 	 * Test HTTP Cookie handling
 	 *

tests/phpunit/tests/http/http.php

@@ -372,4 +372,80 @@ function wp_translate_php_url_constant_to_key_testcases() {
 		);
 	}
 
+	/**
+	 * Test HTTP Redirects with multiple Location headers specified.
+	 *
+	 * Ensure the WP_HTTP::handle_redirects() method handles multiple Location headers
+	 * and the HTTP request it makes uses the last Location header.
+	 *
+	 * @ticket 16890
+	 * @ticket 57306
+	 *
+	 * @covers WP_HTTP::handle_redirects
+	 */
+	public function test_multiple_location_headers() {
+		// Filter the response made by WP_HTTP::handle_redirects().
+		add_filter(
+			'pre_http_request',
+			array( $this, 'filter_for_multiple_location_headers' ),
+			10,
+			3
+		);
+
+		$headers = array(
+			'server'       => 'nginx',
+			'date'         => 'Sun, 11 Dec 2022 23:11:22 GMT',
+			'content-type' => 'text/html; charset=utf-8',
+			'location'     => array(
+				'http://example.com/?multiple-location-headers=1&redirected=one',
+				'http://example.com/?multiple-location-headers=1&redirected=two',
+			),
+		);
+
+		// Test the tests: ensure multiple locations are passed to WP_HTTP::handle_redirects().
+		$this->assertTrue( is_array( $headers['location'] ), 'Location header is expected to be an array.' );
+		$this->assertCount( 2, $headers['location'], 'Location header is expected to contain two values.' );
+
+		$args = array(
+			'timeout'      => 30,
+			'_redirection' => 3,
+			'redirection'  => 2,
+			'method'       => 'GET',
+		);
+
+		$redirect_response = _wp_http_get_object()->handle_redirects(
+			'http://example.com/?multiple-location-headers=1',
+			$args,
+			array(
+				'headers'  => $headers,
+				'body'     => '',
+				'cookies'  => array(),
+				'filename' => null,
+				'response' => array(
+					'code'    => 302,
+					'message' => 'Found',
+				),
+			)
+		);
+		$this->assertSame( 'PASS', wp_remote_retrieve_body( $redirect_response ), 'Redirect response body is expected to be PASS.' );
+	}
+
+	public function filter_for_multiple_location_headers( $response, $args, $url ) {
+		if ( 'http://example.com/?multiple-location-headers=1&redirected=two' === $url ) {
+			$body = 'PASS';
+		} else {
+			$body = 'FAIL';
+		}
+
+		return array(
+			'headers'  => array(),
+			'body'     => $body,
+			'response' => array(
+				'code'    => 200,
+				'message' => 'OK',
+			),
+			'cookies'  => array(),
+			'filename' => null,
+		);
+	}
 }