Index: tests/phpunit/tests/formatting/UrlencodeDeep.php
===================================================================
--- tests/phpunit/tests/formatting/UrlencodeDeep.php	(revisione 0)
+++ tests/phpunit/tests/formatting/UrlencodeDeep.php	(copia locale)
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * @group formatting
+ */
+class Tests_Formatting_UrlencodeDeep extends WP_UnitTestCase {
+
+	/**
+	 * Data Provider
+	 */
+	public function get_test_values() {
+		return array(
+			array( 'qwerty123456', 'qwerty123456' ),
+			array( '|!"£$%&/()=?', '%7C%21%22%C2%A3%24%25%26%2F%28%29%3D%3F' ),
+			array( '^é*ç°§;:_-.,', '%5E%C3%A9%2A%C3%A7%C2%B0%C2%A7%3B%3A_-.%2C' ),
+			array( 'abc123 @#[]€', 'abc123+%40%23%5B%5D%E2%82%AC' ),
+		);
+	}
+
+	/**
+	 * Validate the urlencode_deep function pair by pair
+	 * @dataProvider get_test_values
+	 *
+	 * @param string $actual
+	 * @param string $expected
+	 */
+	function test_urlencode_deep( $actual, $expected ) {
+		$this->assertEquals( $expected, urlencode_deep( $actual ) );
+	}
+
+	/**
+	 * Test the whole array as input
+	 */
+	function test_urlencode_deep_all() {
+		$data = $this->get_test_values();
+
+		$actual   = wp_list_pluck( $data, 0 );
+		$expected = wp_list_pluck( $data, 1 );
+
+		$this->assertEquals( $expected, urlencode_deep( $actual ) );
+	}
+
+}