libsyntax: Unconfigure tests during normal build

1 files changed, 58 insertions, 0 deletions

diff --git a/src/libsyntax/util/lev_distance/tests.rs b/src/libsyntax/util/lev_distance/tests.rs
new file mode 100644
index 00000000000..1a746a67ec0
--- /dev/null
+++ b/src/libsyntax/util/lev_distance/tests.rs
@@ -0,0 +1,58 @@
+use super::*;
+
+#[test]
+fn test_lev_distance() {
+    use std::char::{from_u32, MAX};
+    // Test bytelength agnosticity
+    for c in (0..MAX as u32)
+             .filter_map(|i| from_u32(i))
+             .map(|i| i.to_string()) {
+        assert_eq!(lev_distance(&c[..], &c[..]), 0);
+    }
+
+    let a = "\nMäry häd ä little lämb\n\nLittle lämb\n";
+    let b = "\nMary häd ä little lämb\n\nLittle lämb\n";
+    let c = "Mary häd ä little lämb\n\nLittle lämb\n";
+    assert_eq!(lev_distance(a, b), 1);
+    assert_eq!(lev_distance(b, a), 1);
+    assert_eq!(lev_distance(a, c), 2);
+    assert_eq!(lev_distance(c, a), 2);
+    assert_eq!(lev_distance(b, c), 1);
+    assert_eq!(lev_distance(c, b), 1);
+}
+
+#[test]
+fn test_find_best_match_for_name() {
+    use crate::with_default_globals;
+    with_default_globals(|| {
+        let input = vec![Symbol::intern("aaab"), Symbol::intern("aaabc")];
+        assert_eq!(
+            find_best_match_for_name(input.iter(), "aaaa", None),
+            Some(Symbol::intern("aaab"))
+        );
+
+        assert_eq!(
+            find_best_match_for_name(input.iter(), "1111111111", None),
+            None
+        );
+
+        let input = vec![Symbol::intern("aAAA")];
+        assert_eq!(
+            find_best_match_for_name(input.iter(), "AAAA", None),
+            Some(Symbol::intern("aAAA"))
+        );
+
+        let input = vec![Symbol::intern("AAAA")];
+        // Returns None because `lev_distance > max_dist / 3`
+        assert_eq!(
+            find_best_match_for_name(input.iter(), "aaaa", None),
+            None
+        );
+
+        let input = vec![Symbol::intern("AAAA")];
+        assert_eq!(
+            find_best_match_for_name(input.iter(), "aaaa", Some(4)),
+            Some(Symbol::intern("AAAA"))
+        );
+    })
+}