Add regression tests for add_schema() SSL operator precedence and triple-slash URL normalization

Agent-Logs-Url: https://github.com/Codeinwp/optimole-wp/sessions/0b947f08-2140-4d1b-9330-9381b891257a

Co-authored-by: kushh23 <110405452+kushh23@users.noreply.github.com>

Author: Copilot

tests/test-generic.php

@@ -169,6 +169,34 @@ function test_get_unoptimized_url_edge_cases() {
 		$this->assertEquals( $uploaded_url, $result );
 	}
 
+	/**
+	 * Test add_schema() prepends http: for protocol-relative URLs on non-SSL.
+	 */
+	function test_add_schema_non_ssl() {
+		$this->assertEquals( 'http://example.org/image.jpg', $this->add_schema( '//example.org/image.jpg' ) );
+	}
+
+	/**
+	 * Test add_schema() prepends https: for protocol-relative URLs on SSL.
+	 * Regression: operator-precedence bug caused https: to be returned bare instead of https://example.org/...
+	 */
+	function test_add_schema_ssl() {
+		$_SERVER['HTTPS'] = 'on';
+		$result = $this->add_schema( '//example.org/image.jpg' );
+		unset( $_SERVER['HTTPS'] );
+
+		$this->assertEquals( 'https://example.org/image.jpg', $result );
+		$this->assertStringNotEquals( 'https:', $result );
+	}
+
+	/**
+	 * Test add_schema() leaves already-schemed URLs unchanged.
+	 */
+	function test_add_schema_already_schemed() {
+		$this->assertEquals( 'http://example.org/image.jpg', $this->add_schema( 'http://example.org/image.jpg' ) );
+		$this->assertEquals( 'https://example.org/image.jpg', $this->add_schema( 'https://example.org/image.jpg' ) );
+	}
+
 	/**
 	 * Test get_unoptimized_url with custom domain configuration.
 	 */

tests/test-replacer.php

@@ -450,6 +450,21 @@ public function test_replacement_without_scheme() {
 		$this->assertStringContainsString( 'http://www.example.org', $replaced_content );
 	}
 
+	/**
+	 * Regression test: triple-slash URLs (///host/path) must be normalized to
+	 * http(s)://host/path before CDN embedding — never produce https:///host/path.
+	 */
+	public function test_replacement_triple_slash_url() {
+		$content          = '<div class="codeinwp-container">
+				<img src="///www.example.org/wp-content/uploads/2018/05/brands.png"> 
+			</div>';
+		$replaced_content = Optml_Manager::instance()->replace_content( $content );
+
+		$this->assertStringContainsString( 'i.optimole.com', $replaced_content );
+		$this->assertStringNotContainsString( ':///', $replaced_content );
+		$this->assertStringContainsString( 'http://www.example.org', $replaced_content );
+	}
+
 	public function test_non_allowed_extensions() {
 		$replaced_content = Optml_Manager::instance()->replace_content( ( self::CSS_STYLE . self::IMG_TAGS . self::WRONG_EXTENSION ) );
 		$this->assertStringContainsString( 'i.optimole.com', $replaced_content );