test mime parse empty files

Author: yoshuawuyts

tests/fixtures/empty.custom

@@ -27,7 +27,16 @@ async fn guess_binary_mime() -> http_types::Result<()> {
 
 #[async_std::test]
 async fn guess_mime_fallback() -> io::Result<()> {
-    let body = Body::from_file("tests/fixtures/unknown.custom_ext").await?;
+    let body = Body::from_file("tests/fixtures/unknown.custom").await?;
+    let mut res = Response::new(200);
+    res.set_body(body);
+    assert_eq!(res.content_type(), Some(mime::BYTE_STREAM));
+    Ok(())
+}
+
+#[async_std::test]
+async fn parse_empty_files() -> http_types::Result<()> {
+    let body = Body::from_file("tests/fixtures/empty.custom").await?;
     let mut res = Response::new(200);
     res.set_body(body);
     assert_eq!(res.content_type(), Some(mime::BYTE_STREAM));