Add another test, a run-pass one

Author: jakubadamw

tests/ui/match/aggregate-array-eq.rs

@@ -0,0 +1,16 @@
+//! Verify that matching against a constant array pattern produces correct
+//! results at runtime, complementing the MIR test in
+//! `tests/mir-opt/building/match/aggregate_array_eq.rs` which checks that
+//! a single aggregate `PartialEq::eq` call is emitted.
+//@ run-pass
+
+fn array_match(x: [u8; 4]) -> bool {
+    matches!(x, [1, 2, 3, 4])
+}
+
+fn main() {
+    assert!(array_match([1, 2, 3, 4]));
+    assert!(!array_match([1, 2, 3, 5]));
+    assert!(!array_match([0, 0, 0, 0]));
+    assert!(!array_match([4, 3, 2, 1]));
+}