Diagnose when test features are missing

tests/features/error.rs

@@ -0,0 +1 @@
+"Hello! You want: cargo test --release --all-features"

tests/features/mod.rs

@@ -0,0 +1,13 @@
+#[cfg(not(all(
+    feature = "derive",
+    feature = "full",
+    feature = "parsing",
+    feature = "printing",
+    feature = "visit",
+    feature = "visit-mut",
+    feature = "fold",
+    feature = "clone-impls",
+    feature = "extra-traits",
+    feature = "proc-macro",
+)))]
+mod error;

tests/test_asyncness.rs

@@ -6,11 +6,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(all(feature = "extra-traits", feature = "full"))]
-
 extern crate proc_macro2;
 extern crate syn;
 
+mod features;
+
 use proc_macro2::Span;
 use syn::punctuated::Punctuated;
 use syn::{Block, Expr, ExprBlock, ExprClosure, FnDecl, Ident, ItemFn, ReturnType, Visibility};

tests/test_derive_input.rs

@@ -6,11 +6,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(feature = "extra-traits")]
-
 extern crate proc_macro2;
 extern crate syn;
 
+mod features;
+
 use proc_macro2::Delimiter::{Brace, Parenthesis};
 use proc_macro2::*;
 use syn::punctuated::Punctuated;

tests/test_generics.rs

@@ -6,7 +6,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(feature = "extra-traits")]
 #![recursion_limit = "1024"]
 #![feature(rustc_private)]
 
@@ -23,6 +22,7 @@ use proc_macro2::{Ident, Span, TokenStream};
 mod macros;
 
 mod common;
+mod features;
 
 fn ident(s: &str) -> Ident {
     Ident::new(s, Span::call_site())

tests/test_grouping.rs

@@ -6,7 +6,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(all(feature = "extra-traits", feature = "full"))]
 #![recursion_limit = "1024"]
 #![feature(rustc_private)]
 
@@ -22,6 +21,7 @@ use proc_macro2::*;
 mod macros;
 
 mod common;
+mod features;
 
 fn expr<T: Into<Expr>>(t: T) -> Expr {
     t.into()

tests/test_ident.rs

@@ -9,6 +9,8 @@
 extern crate proc_macro2;
 extern crate syn;
 
+mod features;
+
 use proc_macro2::{Ident, Span, TokenStream};
 use std::str::FromStr;
 use syn::parse::Error;

tests/test_lit.rs

@@ -10,6 +10,8 @@ extern crate proc_macro2;
 extern crate quote;
 extern crate syn;
 
+mod features;
+
 use proc_macro2::{TokenStream, TokenTree};
 use quote::ToTokens;
 use std::str::FromStr;

tests/test_meta_item.rs

@@ -6,12 +6,12 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(feature = "extra-traits")]
-
 extern crate proc_macro2;
 extern crate quote;
 extern crate syn;
 
+mod features;
+
 use proc_macro2::{Ident, Literal, Span};
 use syn::parse::Parser;
 use syn::*;

tests/test_pat.rs

@@ -10,6 +10,8 @@
 extern crate quote;
 extern crate syn;
 
+mod features;
+
 #[test]
 fn test_pat_ident() {
     match syn::parse2(quote!(self)).unwrap() {

tests/test_precedence.rs

@@ -6,7 +6,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(all(feature = "full", feature = "fold"))]
 #![recursion_limit = "1024"]
 #![feature(rustc_private)]
 
@@ -33,6 +32,8 @@ extern crate syn;
 extern crate syntax;
 extern crate walkdir;
 
+mod features;
+
 use rayon::iter::{IntoParallelIterator, ParallelIterator};
 use regex::Regex;
 use syntax::ast;

tests/test_round_trip.rs

@@ -6,7 +6,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(feature = "full")]
 #![recursion_limit = "1024"]
 #![feature(rustc_private)]
 
@@ -18,6 +17,8 @@ extern crate syntax;
 extern crate syntax_pos;
 extern crate walkdir;
 
+mod features;
+
 use rayon::iter::{IntoParallelIterator, ParallelIterator};
 use syntax::ast;
 use syntax::parse::{self, PResult, ParseSess};

tests/test_should_parse.rs

@@ -8,6 +8,8 @@
 
 extern crate syn;
 
+mod features;
+
 macro_rules! should_parse {
     ($name:ident, { $($in:tt)* }) => {
         #[test]

tests/test_token_trees.rs

@@ -6,13 +6,13 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg(feature = "extra-traits")]
-
 extern crate proc_macro2;
 #[macro_use]
 extern crate quote;
 extern crate syn;
 
+mod features;
+
 use proc_macro2::Delimiter::*;
 use proc_macro2::*;
 use syn::{AttrStyle, Attribute, Lit};