From eed8ff38e68c78188cc94e539969746de6488746 Mon Sep 17 00:00:00 2001
From: Folkert <folkert@folkertdev.nl>
Date: Mon, 20 Jul 2020 14:06:31 +0200
Subject: [PATCH] add usage test

---
 compiler/uniq/tests/test_usage_analysis.rs | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/compiler/uniq/tests/test_usage_analysis.rs b/compiler/uniq/tests/test_usage_analysis.rs
index d7add10545..c33dffc776 100644
--- a/compiler/uniq/tests/test_usage_analysis.rs
+++ b/compiler/uniq/tests/test_usage_analysis.rs
@@ -765,4 +765,30 @@ mod test_usage_analysis {
             },
         );
     }
+
+    #[test]
+    fn record_pattern_optional_fields() {
+        usage_eq(
+            indoc!(
+                r#"
+                a = 34
+
+                when r is
+                    { x, y ? a, z ? a } -> x + y + z
+               "#
+            ),
+            |interns| {
+                let mut usage = VarUsage::default();
+                let home = test_home();
+
+                usage.register_with(interns.symbol(home, "a".into()), &Simple(Shared));
+                usage.register_with(interns.symbol(home, "x".into()), &Simple(Seen));
+                usage.register_with(interns.symbol(home, "y".into()), &Simple(Seen));
+                usage.register_with(interns.symbol(home, "z".into()), &Simple(Seen));
+                usage.register_shared(Symbol::NUM_ADD);
+
+                usage
+            },
+        );
+    }
 }