Add test for unknown Clippy attributes

flip1995 · flip1995 · commit 9c697c2e9503 · 2019-02-28T16:47:00.000+01:00
diff --git a/tests/ui/unknown_attribute.rs b/tests/ui/unknown_attribute.rs
@@ -0,0 +1,4 @@
+#[clippy::unknown]
+#[clippy::cyclomatic_complexity = "1"]
+fn main() {}
+
diff --git a/tests/ui/unknown_attribute.stderr b/tests/ui/unknown_attribute.stderr
@@ -0,0 +1,8 @@
+error: Usage of unknown attribute
+  --> $DIR/unknown_attribute.rs:1:11
+   |
+LL | #[clippy::unknown]
+   |           ^^^^^^^
+
+error: aborting due to previous error
+
