add test for BOM removal

src/loader.rs

@@ -37,7 +37,8 @@ error_chain! {
     }
 }
 
-fn read_file_to_string<P: AsRef<Path>>(p: P) -> Result<String> {
+#[doc(hidden)]
+pub fn read_file_to_string<P: AsRef<Path>>(p: P) -> Result<String> {
     let p = p.as_ref();
     let mut f = File::open(p).chain_err(|| ErrorKind::IOError)?;
     let mut reader: Vec<u8> = Vec::new();

tests/txt.rs

@@ -3,6 +3,7 @@ extern crate ultrastar_txt;
 use std::collections::HashMap;
 use std::path::PathBuf;
 use ultrastar_txt::*;
+use std::path::Path;
 
 // usage:
 //    assert_error_kind!(some_err, ErrorKind::MyErrorType)
@@ -346,6 +347,13 @@ fn relative_line_breaks() {
     assert_eq!(lines[1].rel.unwrap(), 24);
 }
 
+#[test]
+fn encoding_utf8_bom() {
+    let txt = read_file_to_string(Path::new("tests/txts/encoding_utf8_bom.txt")).unwrap();
+    let header = get_simple_txt_header();
+    assert_eq!(header, parse_txt_header_str(&txt).unwrap());
+}
+
 fn get_simple_txt_str() -> &'static str {
     include_str!("txts/simple_txt_with_all_features.txt")
 }

tests/txts/encoding_utf8_bom.txt

@@ -0,0 +1,26 @@
+#TITLE:Testsong
+#ARTIST:Testartist
+#MP3:Testfile.mp3
+#GAP:666
+#BPM:123
+#GENRE:Music
+#EDITION:Testmusic
+#COVER:Cover.jpg
+#BACKGROUND:BG.jpg
+#VIDEO:DLzxrzFCyOs.mp4
+#VIDEOGAP:777
+#RELATIVE:NO
+#LANGUAGE:en
+#YEAR:1337
+: 0 4 59 Test
+: 4 4 59 I
+: 8 4 59 'm
+* 12 4 59 test
+: 16 4 59 ing.
+- 20
+: 24 4 59 Test
+: 28 4 59 I
+: 32 4 59 'm
+F 36 4 59 test
+F 40 4 59 ing.
+E