libsyntax: Unconfigure tests during normal build

1 files changed, 71 insertions, 0 deletions

diff --git a/src/libsyntax/mut_visit/tests.rs b/src/libsyntax/mut_visit/tests.rs
new file mode 100644
index 00000000000..6868736976b
--- /dev/null
+++ b/src/libsyntax/mut_visit/tests.rs
@@ -0,0 +1,71 @@
+use super::*;
+
+use crate::ast::{self, Ident};
+use crate::tests::{string_to_crate, matches_codepattern};
+use crate::print::pprust;
+use crate::mut_visit;
+use crate::with_default_globals;
+
+// this version doesn't care about getting comments or docstrings in.
+fn fake_print_crate(s: &mut pprust::State<'_>,
+                    krate: &ast::Crate) {
+    s.print_mod(&krate.module, &krate.attrs)
+}
+
+// change every identifier to "zz"
+struct ToZzIdentMutVisitor;
+
+impl MutVisitor for ToZzIdentMutVisitor {
+    fn visit_ident(&mut self, ident: &mut ast::Ident) {
+        *ident = Ident::from_str("zz");
+    }
+    fn visit_mac(&mut self, mac: &mut ast::Mac) {
+        mut_visit::noop_visit_mac(mac, self)
+    }
+}
+
+// maybe add to expand.rs...
+macro_rules! assert_pred {
+    ($pred:expr, $predname:expr, $a:expr , $b:expr) => (
+        {
+            let pred_val = $pred;
+            let a_val = $a;
+            let b_val = $b;
+            if !(pred_val(&a_val, &b_val)) {
+                panic!("expected args satisfying {}, got {} and {}",
+                        $predname, a_val, b_val);
+            }
+        }
+    )
+}
+
+// make sure idents get transformed everywhere
+#[test] fn ident_transformation () {
+    with_default_globals(|| {
+        let mut zz_visitor = ToZzIdentMutVisitor;
+        let mut krate = string_to_crate(
+            "#[a] mod b {fn c (d : e, f : g) {h!(i,j,k);l;m}}".to_string());
+        zz_visitor.visit_crate(&mut krate);
+        assert_pred!(
+            matches_codepattern,
+            "matches_codepattern",
+            pprust::to_string(|s| fake_print_crate(s, &krate)),
+            "#[zz]mod zz{fn zz(zz:zz,zz:zz){zz!(zz,zz,zz);zz;zz}}".to_string());
+    })
+}
+
+// even inside macro defs....
+#[test] fn ident_transformation_in_defs () {
+    with_default_globals(|| {
+        let mut zz_visitor = ToZzIdentMutVisitor;
+        let mut krate = string_to_crate(
+            "macro_rules! a {(b $c:expr $(d $e:token)f+ => \
+            (g $(d $d $e)+))} ".to_string());
+        zz_visitor.visit_crate(&mut krate);
+        assert_pred!(
+            matches_codepattern,
+            "matches_codepattern",
+            pprust::to_string(|s| fake_print_crate(s, &krate)),
+            "macro_rules! zz{(zz$zz:zz$(zz $zz:zz)zz+=>(zz$(zz$zz$zz)+))}".to_string());
+    })
+}