Move custom type test out of unit tests

Also make it conditional on the blanket_impl feature,
as UnwrapInfallible is currently effectively sealed without the
blanket impl.

Author: mzabaluev

src/lib.rs

@@ -98,27 +98,4 @@ mod tests {
         let r: Result<bool, !> = Ok(true);
         assert!(r.unwrap_infallible());
     }
-
-    enum MyNeverToken {}
-
-    #[cfg(feature = "never_type")]
-    impl From<MyNeverToken> for ! {
-        fn from(never: MyNeverToken) -> Self {
-            match never {}
-        }
-    }
-
-    #[cfg(not(feature = "blanket_impl"))]
-    impl<T> UnwrapInfallible for Result<T, MyNeverToken> {
-        type Ok = T;
-        fn unwrap_infallible(self) -> T {
-            self.unwrap_or_else(|never| match never {})
-        }
-    }
-
-    #[test]
-    fn with_custom_type() {
-        let r: Result<bool, MyNeverToken> = Ok(true);
-        assert!(r.unwrap_infallible());
-    }
 }

tests/blanket_impl.rs

@@ -0,0 +1,18 @@
+#![cfg(feature = "blanket_impl")]
+#![feature(never_type)]
+
+use unwrap_infallible::UnwrapInfallible;
+
+enum MyNeverToken {}
+
+impl From<MyNeverToken> for ! {
+    fn from(never: MyNeverToken) -> Self {
+        match never {}
+    }
+}
+
+#[test]
+fn with_custom_type() {
+    let r: Result<bool, MyNeverToken> = Ok(true);
+    assert!(r.unwrap_infallible());
+}