From 30f13d56e1fec2524d2f69abf3c40d95b872cc04 Mon Sep 17 00:00:00 2001
From: rejaulalomkhan <armanazij@gmail.com>
Date: Mon, 19 Oct 2026 17:17:45 +0600
Subject: [PATCH] Tests: Add unit test coverage for the_feed_link() and
 post_comments_feed_link()

Adds dedicated PHPUnit test coverage for the_feed_link() and post_comments_feed_link() in tests/phpunit/tests/link/.

See #65819.
---
 .../tests/link/postCommentsFeedLink.php       | 151 ++++++++++++++++++
 tests/phpunit/tests/link/theFeedLink.php      | 106 ++++++++++++
 2 files changed, 257 insertions(+)
 create mode 100644 tests/phpunit/tests/link/postCommentsFeedLink.php
 create mode 100644 tests/phpunit/tests/link/theFeedLink.php

diff --git a/tests/phpunit/tests/link/postCommentsFeedLink.php b/tests/phpunit/tests/link/postCommentsFeedLink.php
new file mode 100644
index 0000000000000..7673471c78737
--- /dev/null
+++ b/tests/phpunit/tests/link/postCommentsFeedLink.php
@@ -0,0 +1,151 @@
+<?php
+
+/**
+ * @group link
+ *
+ * @covers ::post_comments_feed_link
+ */
+class Tests_Link_PostCommentsFeedLink extends WP_UnitTestCase {
+
+	/**
+	 * Test post ID.
+	 *
+	 * @var int
+	 */
+	protected static $post_id;
+
+	/**
+	 * Set up before class.
+	 *
+	 * @param WP_UnitTest_Factory $factory Test factory.
+	 */
+	public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
+		self::$post_id = $factory->post->create(
+			array(
+				'post_title' => 'Sample Post for Feed',
+			)
+		);
+	}
+
+	/**
+	 * Tests post_comments_feed_link() with default link text on plain permalinks.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_post_comments_feed_link_default_text() {
+		$this->set_permalink_structure( '' );
+
+		$expected_url = get_post_comments_feed_link( self::$post_id );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Comments Feed</a>';
+
+		ob_start();
+		post_comments_feed_link( '', self::$post_id );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests post_comments_feed_link() with custom link text.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_post_comments_feed_link_custom_text() {
+		$this->set_permalink_structure( '' );
+
+		$expected_url = get_post_comments_feed_link( self::$post_id );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Subscribe via RSS</a>';
+
+		ob_start();
+		post_comments_feed_link( 'Subscribe via RSS', self::$post_id );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests post_comments_feed_link() with pretty permalink structure.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_post_comments_feed_link_pretty_permastruct() {
+		$this->set_permalink_structure( '/%year%/%monthnum%/%day%/%postname%/' );
+
+		$expected_url = get_post_comments_feed_link( self::$post_id );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Comments Feed</a>';
+
+		ob_start();
+		post_comments_feed_link( '', self::$post_id );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests post_comments_feed_link() defaulting to global $post when post_id is 0.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_post_comments_feed_link_defaults_to_global_post() {
+		global $post;
+
+		$this->set_permalink_structure( '' );
+
+		$original_post = $post;
+		$post          = get_post( self::$post_id );
+
+		$expected_url = get_post_comments_feed_link( self::$post_id );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Comments Feed</a>';
+
+		ob_start();
+		post_comments_feed_link();
+		$output = ob_get_clean();
+
+		$post = $original_post;
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests post_comments_feed_link() with a custom feed type.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_post_comments_feed_link_custom_feed_type() {
+		$this->set_permalink_structure( '' );
+
+		$expected_url = get_post_comments_feed_link( self::$post_id, 'atom' );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Atom Comments</a>';
+
+		ob_start();
+		post_comments_feed_link( 'Atom Comments', self::$post_id, 'atom' );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests the 'post_comments_feed_link_html' filter hook.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_post_comments_feed_link_html_filter() {
+		$this->set_permalink_structure( '' );
+
+		add_filter(
+			'post_comments_feed_link_html',
+			static function ( $link, $post_id, $feed ) {
+				return '<span class="post-feed" data-post="' . (int) $post_id . '" data-feed="' . esc_attr( $feed ) . '">' . $link . '</span>';
+			},
+			10,
+			3
+		);
+
+		ob_start();
+		post_comments_feed_link( 'Comments', self::$post_id, 'atom' );
+		$output = ob_get_clean();
+
+		$this->assertStringStartsWith( '<span class="post-feed" data-post="' . self::$post_id . '" data-feed="atom"><a', $output );
+		$this->assertStringEndsWith( 'Comments</a></span>', $output );
+	}
+}
diff --git a/tests/phpunit/tests/link/theFeedLink.php b/tests/phpunit/tests/link/theFeedLink.php
new file mode 100644
index 0000000000000..01d43bea79b44
--- /dev/null
+++ b/tests/phpunit/tests/link/theFeedLink.php
@@ -0,0 +1,106 @@
+<?php
+
+/**
+ * @group link
+ *
+ * @covers ::the_feed_link
+ */
+class Tests_Link_TheFeedLink extends WP_UnitTestCase {
+
+	/**
+	 * Tests the_feed_link() with plain permalink structure and default feed.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_the_feed_link_plain_permastruct_default_feed() {
+		$this->set_permalink_structure( '' );
+
+		$expected_url = home_url( '?feed=' . get_default_feed() );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Entries RSS</a>';
+
+		ob_start();
+		the_feed_link( 'Entries RSS' );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests the_feed_link() with pretty permalink structure and default feed.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_the_feed_link_pretty_permastruct_default_feed() {
+		$this->set_permalink_structure( '/%year%/%monthnum%/%day%/%postname%/' );
+
+		$expected_url = home_url( '/feed/' );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Entries Feed</a>';
+
+		ob_start();
+		the_feed_link( 'Entries Feed' );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests the_feed_link() with custom feed type.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_the_feed_link_custom_feed_type() {
+		$this->set_permalink_structure( '' );
+
+		$expected_url = home_url( '?feed=atom' );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Atom Feed</a>';
+
+		ob_start();
+		the_feed_link( 'Atom Feed', 'atom' );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests the_feed_link() with pretty permalinks and custom feed type.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_the_feed_link_pretty_permastruct_custom_feed_type() {
+		$this->set_permalink_structure( '/%year%/%monthnum%/%day%/%postname%/' );
+
+		$expected_url = home_url( '/feed/atom/' );
+		$expected     = '<a href="' . esc_url( $expected_url ) . '">Atom Feed</a>';
+
+		ob_start();
+		the_feed_link( 'Atom Feed', 'atom' );
+		$output = ob_get_clean();
+
+		$this->assertSame( $expected, $output );
+	}
+
+	/**
+	 * Tests the 'the_feed_link' filter hook.
+	 *
+	 * @ticket 65819
+	 */
+	public function test_the_feed_link_filter() {
+		$this->set_permalink_structure( '' );
+
+		add_filter(
+			'the_feed_link',
+			static function ( $link, $feed ) {
+				return '<div class="feed-wrapper" data-feed="' . esc_attr( $feed ) . '">' . $link . '</div>';
+			},
+			10,
+			2
+		);
+
+		ob_start();
+		the_feed_link( 'Custom Filtered Feed', 'atom' );
+		$output = ob_get_clean();
+
+		$this->assertStringStartsWith( '<div class="feed-wrapper" data-feed="atom"><a', $output );
+		$this->assertStringEndsWith( 'Custom Filtered Feed</a></div>', $output );
+	}
+}