tests: version 0 parsing/writing

Cargo.toml

@@ -15,3 +15,4 @@ categories = ["file-format", "audio", "games"]
 [dependencies]
 paste = "1.0"
 byteorder = "1.4"
+diff = "0.1"

src/tests.rs

@@ -1,17 +1,29 @@
 mod tests {
     use super::super::parser::read_nbs;
     use super::super::Song;
-    const TEST_FILE_SOURCE: &str = "test_files/Megalovania.nbs";
-    const TEST_FILE_DEST: &str = "test_files/MegalovaniaTest.nbs";
-    
+    use diff::chars;
+    const TEST_FILES: [&str;2] = ["test_files/Megalovania.nbs", "test_files/DB.nbs"];
+
     #[test]
-    fn io() {
-        let mut file_before_writing = read_nbs(TEST_FILE_SOURCE).expect("Some reading error occured before writing");
+    fn io() { for test_file in TEST_FILES {
+        let mut file_before_writing = read_nbs(test_file).expect("Some reading error occured before writing");
+
+        let test_file_dest = (test_file.to_string() + "Test");
 
-        file_before_writing.save(TEST_FILE_DEST, 5).expect("Some writing error ocurred");
+        file_before_writing.save(test_file_dest.as_str(), file_before_writing.header.version.unwrap() as u8).expect("Some writing error ocurred");
 
-        let file_after_writing = read_nbs(TEST_FILE_DEST).expect("Some reading error occured after writing");
+        let file_after_writing = read_nbs(test_file_dest.as_str()).expect("Some reading error occured after writing");
 
-        assert_eq!(file_before_writing, file_after_writing);
-    }
+        if file_before_writing != file_after_writing {
+            let dbg_before = format!("{:?}", file_before_writing);
+            let dbg_after = format!("{:?}", file_after_writing);
+            for diff in chars(dbg_before.as_str(), dbg_after.as_str()) {
+                match diff {
+                    diff::Result::Left(l) => println!("\n\n- {}\n\n", l),
+                    diff::Result::Right(r) => println!("\n\n+ {}\n\n", r),
+                    diff::Result::Both(b, _) => print!("{}", b),
+                }
+            } panic!("{} failed!", test_file);
+        }
+    }}
 }