1 files changed, 18 insertions, 13 deletions
diff --git a/src/libsyntax_pos/tests.rs b/src/libsyntax_pos/tests.rs
index 6bd6016020a..87cc3505e38 100644
--- a/src/libsyntax_pos/tests.rs
+++ b/src/libsyntax_pos/tests.rs
@@ -19,20 +19,25 @@ fn test_lookup_line() {
 
 #[test]
 fn test_normalize_newlines() {
-    fn check(before: &str, after: &str) {
+    fn check(before: &str, after: &str, expected_positions: &[u32]) {
         let mut actual = before.to_string();
-        normalize_newlines(&mut actual);
+        let mut actual_positions = vec![];
+        normalize_newlines(&mut actual, &mut actual_positions);
+        let actual_positions : Vec<_> = actual_positions
+            .into_iter()
+            .map(|nc| nc.pos.0).collect();
         assert_eq!(actual.as_str(), after);
+        assert_eq!(actual_positions, expected_positions);
     }
-    check("", "");
-    check("\n", "\n");
-    check("\r", "\r");
-    check("\r\r", "\r\r");
-    check("\r\n", "\n");
-    check("hello world", "hello world");
-    check("hello\nworld", "hello\nworld");
-    check("hello\r\nworld", "hello\nworld");
-    check("\r\nhello\r\nworld\r\n", "\nhello\nworld\n");
-    check("\r\r\n", "\r\n");
-    check("hello\rworld", "hello\rworld");
+    check("", "", &[]);
+    check("\n", "\n", &[]);
+    check("\r", "\r", &[]);
+    check("\r\r", "\r\r", &[]);
+    check("\r\n", "\n", &[1]);
+    check("hello world", "hello world", &[]);
+    check("hello\nworld", "hello\nworld", &[]);
+    check("hello\r\nworld", "hello\nworld", &[6]);
+    check("\r\nhello\r\nworld\r\n", "\nhello\nworld\n", &[1, 7, 13]);
+    check("\r\r\n", "\r\n", &[2]);
+    check("hello\rworld", "hello\rworld", &[]);
 }