Merge pull request #2342 from Mikadore/master

Test `head` being able to work on invalid utf8

tests/by-util/test_head.rs

@@ -250,6 +250,27 @@ hello
         );
 }
 
+#[test]
+fn test_bad_utf8() {
+    let bytes: &[u8] = b"\xfc\x80\x80\x80\x80\xaf";
+    new_ucmd!()
+        .args(&["-c", "6"])
+        .pipe_in(bytes)
+        .succeeds()
+        .stdout_is_bytes(bytes);
+}
+
+#[test]
+fn test_bad_utf8_lines() {
+    let input: &[u8] = b"\xfc\x80\x80\x80\x80\xaf\nb\xfc\x80\x80\x80\x80\xaf\nb\xfc\x80\x80\x80\x80\xaf";
+    let output = b"\xfc\x80\x80\x80\x80\xaf\nb\xfc\x80\x80\x80\x80\xaf\n";
+    new_ucmd!()
+        .args(&["-n", "2"])
+        .pipe_in(input)
+        .succeeds()
+        .stdout_is_bytes(output);
+}
+
 #[test]
 fn test_head_invalid_num() {
     new_ucmd!()