Detect missing readme headers

includes/Checker/Checks/Plugin_Readme_Check.php

@@ -77,6 +77,9 @@ protected function check_files( Check_Result $result, array $files ) {
 		// Check the readme file for plugin name.
 		$this->check_name( $result, $readme_file, $parser );
 
+		// Check the readme file for missing headers.
+		$this->check_headers( $result, $readme_file, $parser );
+
 		// Check the readme file for default text.
 		$this->check_default_text( $result, $readme_file, $parser );
 
@@ -120,6 +123,45 @@ private function check_name( Check_Result $result, string $readme_file, Parser $
 		}
 	}
 
+	/**
+	 * Checks the readme file for missing headers.
+	 *
+	 * @since n.e.x.t
+	 *
+	 * @param Check_Result $result      The Check Result to amend.
+	 * @param string       $readme_file Readme file.
+	 * @param Parser       $parser      The Parser object.
+	 */
+	private function check_headers( Check_Result $result, string $readme_file, Parser $parser ) {
+		$ignored_warnings = $this->get_ignored_warnings( $parser );
+
+		$fields = array(
+			'tested'       => array(
+				'label'      => __( 'Tested up to', 'plugin-check' ),
+				'ignore_key' => 'tested_header_ignored',
+			),
+			'contributors' => array(
+				'label'      => __( 'Contributors', 'plugin-check' ),
+				'ignore_key' => 'contributor_ignored',
+			),
+		);
+
+		foreach ( $fields as $field_key => $field ) {
+			if ( empty( $parser->{$field_key} ) && ! in_array( $field['ignore_key'], $ignored_warnings, true ) ) {
+				$this->add_result_warning_for_file(
+					$result,
+					sprintf(
+						/* translators: %s: plugin header tag */
+						__( 'The "%s" field is missing.', 'plugin-check' ),
+						$field['label']
+					),
+					'missing_readme_header',
+					$readme_file
+				);
+			}
+		}
+	}
+
 	/**
 	 * Checks the readme file for default text.
 	 *
@@ -253,10 +295,6 @@ private function check_for_warnings( Check_Result $result, string $readme_file,
 
 		$latest_wordpress_version = (float) $this->get_wordpress_stable_version();
 
-		$ignored_warnings = array(
-			'contributor_ignored',
-		);
-
 		$messages = array(
 			'contributor_ignored'          => sprintf(
 				/* translators: %s: plugin header tag */
@@ -307,15 +345,7 @@ private function check_for_warnings( Check_Result $result, string $readme_file,
 			),
 		);
 
-		/**
-		 * Filter the list of ignored readme parser warnings.
-		 *
-		 * @since n.e.x.t
-		 *
-		 * @param array  $ignored_warnings Array of ignored warning keys.
-		 * @param Parser $parser           The Parser object.
-		 */
-		$ignored_warnings = (array) apply_filters( 'wp_plugin_check_ignored_readme_warnings', $ignored_warnings, $parser );
+		$ignored_warnings = $this->get_ignored_warnings( $parser );
 
 		$warning_keys = array_diff( $warning_keys, $ignored_warnings );
 
@@ -366,4 +396,29 @@ private function get_wordpress_stable_version() {
 
 		return $version;
 	}
+	/**
+	 * Returns ignored warnings.
+	 *
+	 * @since n.e.x.t
+	 *
+	 * @param Parser $parser The Parser object.
+	 * @return array Ignore warnings.
+	 */
+	private function get_ignored_warnings( Parser $parser ) {
+		$ignored_warnings = array(
+			'contributor_ignored',
+		);
+
+		/**
+		 * Filter the list of ignored readme parser warnings.
+		 *
+		 * @since n.e.x.t
+		 *
+		 * @param array  $ignored_warnings Array of ignored warning keys.
+		 * @param Parser $parser           The Parser object.
+		 */
+		$ignored_warnings = (array) apply_filters( 'wp_plugin_check_ignored_readme_warnings', $ignored_warnings, $parser );
+
+		return $ignored_warnings;
+	}
 }