libsyntax: Add tests for parse_view_item

src/libsyntax/util/parser_testing.rs

@@ -67,6 +67,13 @@ pub fn string_to_stmt(source_str : String) -> P<ast::Stmt> {
     })
 }
 
+/// Parse a string, return a view item
+pub fn string_to_view_item (source_str : String) -> ast::ViewItem {
+    with_error_checking_parse(source_str, |p| {
+        p.parse_view_item(Vec::new())
+    })
+}
+
 /// Parse a string, return a pat. Uses "irrefutable"... which doesn't
 /// (currently) affect parsing.
 pub fn string_to_pat(source_str: String) -> P<ast::Pat> {