1 files changed, 44 insertions, 0 deletions
diff --git a/src/test/model/ObservedDataTest.java b/src/test/model/ObservedDataTest.java
new file mode 100644
index 0000000..60ed2ed
--- /dev/null
+++ b/src/test/model/ObservedDataTest.java
@@ -0,0 +1,44 @@
+package model;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+public class ObservedDataTest {
+    private ObservedData<Integer> target;
+
+    private int callbackCount = 0;
+    private int callbackDirection = Integer.MIN_VALUE;
+    private int callbackIndex = Integer.MIN_VALUE;
+
+    private final Observer<Integer> obs = ((data, direction, index) -> {
+        callbackCount++;
+        callbackDirection = direction;
+        callbackIndex = index;
+    });
+
+    @BeforeEach
+    void setup() {
+        target = new ObservedData<>(0, obs);
+        callbackCount = 0;
+        callbackDirection = Integer.MIN_VALUE;
+        callbackIndex = Integer.MIN_VALUE;
+    }
+
+    @Test
+    void testConstructor() {
+        assertEquals(0, target.get());
+        assertNotNull(target.getAcceptor());
+    }
+
+    @Test
+    void testSet() {
+        target.set(114514);
+        assertEquals(114514, target.get());
+        assertEquals(1, callbackCount);
+        assertEquals(Observer.DIRECTION_CHANGE, callbackDirection);
+        assertEquals(Observer.INDEX_NOT_IN_LIST, callbackIndex);
+    }
+}