General: Update wp.sanitize.stripTags() to return empty string when not passed a string.

Developed in WordPress#10994

Follow-up to r61585, r61578.

Props westonruter, jonsurrell, dmsnell, hugod.
See #64574, #64274.


git-svn-id: https://develop.svn.wordpress.org/trunk@61783 602fd350-edb4-49c9-b593-d223f7449a82

Author: westonruter

src/js/_enqueues/wp/sanitize.js

@@ -23,7 +23,7 @@
 		 * @return {string} Stripped text.
 		 */
 		stripTags: function( text ) {
-			if ( ! text ) {
+			if ( 'string' !== typeof text ) {
 				return '';
 			}
 

tests/qunit/wp-includes/js/wp-sanitize.js

@@ -17,9 +17,11 @@ QUnit.test( 'stripTags should strip tags from string', function( assert ) {
 	assert.strictEqual( result, 'Hello World', 'stripTags( "<p>Hello <b>World</b></p>" ) should return "Hello World"' );
 } );
 
-QUnit.test( 'stripTags should convert numbers to strings', function( assert ) {
-	const result = wp.sanitize.stripTags( 123 );
-	assert.strictEqual( result, '123', 'stripTags( 123 ) should return "123"' );
+QUnit.test( 'stripTags should return empty string for truthy non-strings', function( assert ) {
+	assert.strictEqual( wp.sanitize.stripTags( 123 ), '', 'stripTags( 123 ) should return ""' );
+	assert.strictEqual( wp.sanitize.stripTags( true ), '', 'stripTags( true ) should return ""' );
+	assert.strictEqual( wp.sanitize.stripTags( [ 6, 7 ] ), '', 'stripTags( [ 6, 7 ] ) should return ""' );
+	assert.strictEqual( wp.sanitize.stripTags( { foo: 'bar' } ), '', 'stripTags( ( { foo: \'bar\' } ) should return ""' );
 } );
 
 QUnit.test( 'stripTags should return empty string for input 0', function( assert ) {