Add failing if_scopes() test

src/jit/engine.rs

@@ -139,10 +139,36 @@ mod tests {
                 } else {
                     a
                 }
-            }
-            "#;
+            }"#;
         let code_fn = jit_fn::<(i64, i64), i64>(source);
         assert_eq!(code_fn((2, 4)), 2);
         assert_eq!(code_fn((5, 3)), 3);
     }
+
+    #[test]
+    fn if_scopes() {
+        // TODO this is overcomplicated for a test but i had fun writing it
+        let source = r#"
+            if_scopes(i64 a, i64 b) i64 {
+                let mut c = (a + b); // Test 1: 6, Test 2: 10
+                let d = (a * b); // Test 1: 8, Test 2: 21
+
+                let e = if a < b {
+                    // Test 1 only
+                    let d = (b - a); // 2
+                    c = (c * d); // 12
+                    d
+                } else {
+                    // Test 2 only
+                    // let d = (a - b); // 4
+                    // c = (c * d); // 40
+                    d
+                };
+
+                c + d + e // Test 1: 22, Test 2: 65
+            }"#;
+        let code_fn = jit_fn::<(i64, i64), i64>(source);
+        assert_eq!(code_fn((2, 4)), 22); // Test 1
+        assert_eq!(code_fn((7, 3)), 65); // Test 2
+    }
 }