add new file test

Author: ngoc2503

src/main/java/com/ctci/testfirstcommonancestor/FirstCommonAncestorTest.java

@@ -0,0 +1,44 @@
+package com.swe102x.mytest;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import com.swe102x.myclass.FirstCommonAncestor;
+import com.swe102x.myclass.FirstCommonAncestor.TreeNode;
+
+class FirstCommonAncestorTest {
+
+	@BeforeAll
+	static void setUpBeforeClass() throws Exception {
+	}
+
+	@AfterAll
+	static void tearDownAfterClass() throws Exception {
+	}
+		FirstCommonAncestor ancestor;
+		FirstCommonAncestor.TreeNode root;
+	@BeforeEach
+	void setUp() throws Exception {
+		
+		ancestor = new FirstCommonAncestor();
+		root = ancestor.new TreeNode(4);
+		ancestor.addNode(root);
+		
+	}
+
+	@AfterEach
+	void tearDown() throws Exception {
+	}
+
+	@Test
+	void testFindFCA() {
+		//test case
+		assertEquals(null, ancestor.findFCA(null, root.getLeft().getLeft().getLeft(), root.getRight().getRight()));
+	}
+	
+}