src/librustc_ast_pretty/pprust/tests.rs

   1 use super::*;
   2
   3 use rustc_ast::ast;
   4 use rustc_ast::with_default_session_globals;
   5 use rustc_span::source_map::respan;
   6 use rustc_span::symbol::Ident;
   7
   8 fn fun_to_string(
   9     decl: &ast::FnDecl,
  10     header: ast::FnHeader,
  11     name: Ident,
  12     generics: &ast::Generics,
  13 ) -> String {
  14     to_string(|s| {
  15         s.head("");
  16         s.print_fn(decl, header, Some(name), generics);
  17         s.end(); // Close the head box.
  18         s.end(); // Close the outer box.
  19     })
  20 }
  21
  22 fn variant_to_string(var: &ast::Variant) -> String {
  23     to_string(|s| s.print_variant(var))
  24 }
  25
  26 #[test]
  27 fn test_fun_to_string() {
  28     with_default_session_globals(|| {
  29         let abba_ident = Ident::from_str("abba");
  30
  31         let decl =
  32             ast::FnDecl { inputs: Vec::new(), output: ast::FnRetTy::Default(rustc_span::DUMMY_SP) };
  33         let generics = ast::Generics::default();
  34         assert_eq!(
  35             fun_to_string(&decl, ast::FnHeader::default(), abba_ident, &generics),
  36             "fn abba()"
  37         );
  38     })
  39 }
  40
  41 #[test]
  42 fn test_variant_to_string() {
  43     with_default_session_globals(|| {
  44         let ident = Ident::from_str("principal_skinner");
  45
  46         let var = ast::Variant {
  47             ident,
  48             vis: respan(rustc_span::DUMMY_SP, ast::VisibilityKind::Inherited),
  49             attrs: Vec::new(),
  50             id: ast::DUMMY_NODE_ID,
  51             data: ast::VariantData::Unit(ast::DUMMY_NODE_ID),
  52             disr_expr: None,
  53             span: rustc_span::DUMMY_SP,
  54             is_placeholder: false,
  55         };
  56
  57         let varstr = variant_to_string(&var);
  58         assert_eq!(varstr, "principal_skinner");
  59     })
  60 }