Add tests for directly parsing a Scheme

The tests include an [u8] that is invalid UTF-8.

Author: sbosnick

src/uri/scheme.rs

@@ -324,3 +324,28 @@ impl From<Scheme2> for Scheme {
         Scheme { inner: src }
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn scheme_eq_to_str() {
+        assert_eq!(&scheme("http"), "http");
+        assert_eq!(&scheme("https"), "https");
+        assert_eq!(&scheme("ftp"), "ftp");
+        assert_eq!(&scheme("my+funky+scheme"), "my+funky+scheme");
+    }
+
+    #[test]
+    fn invalid_scheme_is_error() {
+        Scheme::try_from("my_funky_scheme").expect_err("Unexpectly valid Scheme");
+
+        // Invalid UTF-8
+        Scheme::try_from([0xC0].as_ref()).expect_err("Unexpectly valid Scheme");
+    }
+
+    fn scheme(s: &str) -> Scheme {
+        s.parse().expect(&format!("Invalid scheme: {}", s))
+    }
+}