Add tests

Author: Nadrieril

tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns-dont-lint-on-arm.lint.stderr

@@ -0,0 +1,30 @@
+error: some variants are not matched explicitly
+  --> $DIR/omitted-patterns-dont-lint-on-arm.rs:15:11
+   |
+LL |     match val {
+   |           ^^^ pattern `NonExhaustiveEnum::Struct { .. }` not covered
+   |
+   = help: ensure that all variants are matched explicitly by adding the suggested match arms
+   = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found
+note: the lint level is defined here
+  --> $DIR/omitted-patterns-dont-lint-on-arm.rs:14:12
+   |
+LL |     #[deny(non_exhaustive_omitted_patterns)]
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: some variants are not matched explicitly
+  --> $DIR/omitted-patterns-dont-lint-on-arm.rs:23:11
+   |
+LL |     match val {
+   |           ^^^ pattern `NonExhaustiveEnum::Struct { .. }` not covered
+   |
+   = help: ensure that all variants are matched explicitly by adding the suggested match arms
+   = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found
+note: the lint level is defined here
+  --> $DIR/omitted-patterns-dont-lint-on-arm.rs:22:27
+   |
+LL |     #[cfg_attr(lint, deny(non_exhaustive_omitted_patterns))]
+   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+

tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns-dont-lint-on-arm.normal.stderr

@@ -0,0 +1,16 @@
+error: some variants are not matched explicitly
+  --> $DIR/omitted-patterns-dont-lint-on-arm.rs:15:11
+   |
+LL |     match val {
+   |           ^^^ pattern `NonExhaustiveEnum::Struct { .. }` not covered
+   |
+   = help: ensure that all variants are matched explicitly by adding the suggested match arms
+   = note: the matched value is of type `NonExhaustiveEnum` and the `non_exhaustive_omitted_patterns` attribute was found
+note: the lint level is defined here
+  --> $DIR/omitted-patterns-dont-lint-on-arm.rs:14:12
+   |
+LL |     #[deny(non_exhaustive_omitted_patterns)]
+   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to previous error
+

tests/ui/rfcs/rfc-2008-non-exhaustive/omitted-patterns-dont-lint-on-arm.rs

@@ -0,0 +1,50 @@
+// revisions: normal lint
+// Test that putting the lint level on a match arm emits a warning, as this was previously
+// meaningful and is no longer.
+#![feature(non_exhaustive_omitted_patterns_lint)]
+
+// aux-build:enums.rs
+extern crate enums;
+
+use enums::NonExhaustiveEnum;
+
+fn main() {
+    let val = NonExhaustiveEnum::Unit;
+
+    #[deny(non_exhaustive_omitted_patterns)]
+    match val {
+        //~^ ERROR some variants are not matched explicitly
+        NonExhaustiveEnum::Unit => {}
+        NonExhaustiveEnum::Tuple(_) => {}
+        _ => {}
+    }
+
+    #[cfg_attr(lint, deny(non_exhaustive_omitted_patterns))]
+    match val {
+        //[lint]~^ ERROR some variants are not matched explicitly
+        NonExhaustiveEnum::Unit => {}
+        NonExhaustiveEnum::Tuple(_) => {}
+        _ => {}
+    }
+
+    match val {
+        NonExhaustiveEnum::Unit => {}
+        NonExhaustiveEnum::Tuple(_) => {}
+        #[deny(non_exhaustive_omitted_patterns)]
+        _ => {}
+    }
+
+    match val {
+        NonExhaustiveEnum::Unit => {}
+        NonExhaustiveEnum::Tuple(_) => {}
+        #[cfg_attr(lint, deny(non_exhaustive_omitted_patterns))]
+        _ => {}
+    }
+
+    match val {
+        NonExhaustiveEnum::Unit => {}
+        NonExhaustiveEnum::Tuple(_) => {}
+        #[cfg_attr(lint, warn(non_exhaustive_omitted_patterns))]
+        _ => {}
+    }
+}