From 2b40511362ba11b8a98fe437f12df8c0a134f7e9 Mon Sep 17 00:00:00 2001
From: Alisa Novik <40357628+Alisa-Novik@users.noreply.github.com>
Date: Thu, 22 May 2025 21:42:50 -0400
Subject: [PATCH] Fix instance field access and add test

---
 src/main/java/com/example/LoxInstance.java    |  2 +-
 .../java/com/example/LoxInstanceTest.java     | 24 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 src/test/java/com/example/LoxInstanceTest.java

diff --git a/src/main/java/com/example/LoxInstance.java b/src/main/java/com/example/LoxInstance.java
index 7f499db..011c700 100644
--- a/src/main/java/com/example/LoxInstance.java
+++ b/src/main/java/com/example/LoxInstance.java
@@ -17,7 +17,7 @@ public String toString() {
     }
 
     Object get(Token name) {
-        if (fields.containsValue(name.lexeme)) {
+        if (fields.containsKey(name.lexeme)) {
             return fields.get(name.lexeme);
         }
 
diff --git a/src/test/java/com/example/LoxInstanceTest.java b/src/test/java/com/example/LoxInstanceTest.java
new file mode 100644
index 0000000..103a42d
--- /dev/null
+++ b/src/test/java/com/example/LoxInstanceTest.java
@@ -0,0 +1,24 @@
+package com.example;
+
+import java.util.HashMap;
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+public class LoxInstanceTest extends TestCase {
+    public LoxInstanceTest(String testName) {
+        super(testName);
+    }
+
+    public static Test suite() {
+        return new TestSuite(LoxInstanceTest.class);
+    }
+
+    public void testFieldAccess() {
+        LoxClass klass = new LoxClass("Foo", null, new HashMap<>());
+        LoxInstance instance = new LoxInstance(klass);
+        Token token = new Token(Token.TokenType.IDENTIFIER, "bar", null, 1);
+        instance.set(token, 42);
+        assertEquals(42, instance.get(token));
+    }
+}