added test for get_num_queries and wp_get_nocache_headers

tests/phpunit/tests/functions/get_num_queries.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * @group functions.php
+ * @covers ::get_num_queries
+ */
+class Tests_Functions_getNumQueries extends WP_UnitTestCase {
+	/**
+	 * @ticket 54490
+	 */
+	public function test_wp_get_num_queries() {
+		global $wpdb;
+
+		$current_count = get_num_queries();
+		$this->assertIsInt( $current_count, 'get_num_queries() did not return an integer.' );
+
+		// do a single db query
+		$wpdb->query( "select * from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME='tableName'" );
+
+		// check the count updated by 1
+		$this->assertSame( $current_count + 1, get_num_queries(), 'The number of queries did not increase by 1.' );
+	}
+}

tests/phpunit/tests/functions/wp_get_nocache_headers.php

@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * @group functions.php
+ * @covers ::wp_get_nocache_headers
+ */
+class Tests_Functions_wpGetNocacheHeaders extends WP_UnitTestCase {
+
+	/**
+	 * @ticket 54490
+	 */
+	public function test_wp_get_nocache_headers() {
+		$this->assertSameSetsWithIndex(
+			array(
+				'Expires'       => 'Wed, 11 Jan 1984 05:00:00 GMT',
+				'Cache-Control' => 'no-cache, must-revalidate, max-age=0',
+				'Last-Modified' => false,
+			),
+			wp_get_nocache_headers()
+		);
+	}
+
+	/**
+	 * @ticket 54490
+	 */
+	public function test_filter_nocache_headers() {
+		add_filter(
+			'nocache_headers',
+			static function() {
+				return array( 'filter_name' => 'nocache_headers' );
+			}
+		);
+
+		$this->assertSameSetsWithIndex(
+			array(
+				'filter_name'   => 'nocache_headers',
+				'Last-Modified' => false,
+			),
+			wp_get_nocache_headers()
+		);
+	}
+
+}