1 files changed, 12 insertions, 0 deletions
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
index aa6c887..e4cee1e 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/rust/RustWriterTests.java
@@ -549,6 +549,18 @@ public class RustWriterTests {
         assertThat(string, equalTo("&x"));
     }
 
+    @Test
+    public void borrowMutableExpression() throws IOException {
+        var rust = RustPrefixExpression.arbitrary()
+            .withOperator(RustPrefixOperator.BORROW_MUTABLE)
+            .withOperand(RustPath.of("x"))
+            .build();
+
+        var string = write(writer -> writer.writeExpression(rust));
+
+        assertThat(string, equalTo("&mut x"));
+    }
+
     // === Struct expressions ===
 
     @Test