[basm] improve a est related to ascii amsdos

cpclib-basm/tests/basm_save.rs

@@ -16,17 +16,29 @@ fn test_save_ascii() {
     let args = args_parser.get_matches_from(["basm", "-I", ".", "-I", "tests/asm/", "good_save_ascii.asm", "--override"]);
     let (env, _) = process(&args, Rc::new(())).expect("Unable to assemble the file");
 
+    let expected = b"HELLO WORLD";
+
     let (content, header) = load_file("TESTASCII.DSK#HELLO.TXT", &ParserOptions::default()).unwrap();
     assert!(header.is_none(), "ASCII files have no header");
     let content: Vec<u8> = content.into();
-    let expected = b"HELLO WORLD";
     assert_eq!(
         &content[..expected.len()],
         expected
     );
+    assert_eq!(content.len(), 1024); // XXX sadly ASCII mode does not allow to properly know the size
+                                     // XXX no idea if 1024 is the real size used in real cpc
 
+
+    let (content, header) = load_file("TESTASCII.DSK#HELLO.BIN", &ParserOptions::default()).unwrap();
+    assert!(header.is_some());
+    let content: Vec<u8> = content.into();
+    assert_eq!(
+        &content[..expected.len()],
+        expected
+    );
     assert_eq!(content.len(), expected.len());
 
+
 }
 
 #[test]