From 5002e2da07308f9a227c8d1435fb394ae52d8494 Mon Sep 17 00:00:00 2001
From: Ngo Duc Huy <17020798@vnu.edu.vn>
Date: Wed, 2 Oct 2019 01:11:06 +0700
Subject: [PATCH] Create CombinationTest.java

---
 CombinationTest.java | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 CombinationTest.java

diff --git a/CombinationTest.java b/CombinationTest.java
new file mode 100644
index 0000000..200da3b
--- /dev/null
+++ b/CombinationTest.java
@@ -0,0 +1,36 @@
+package testing;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class CombinationTest {
+	@Test
+	public void test1() {
+		long com1 = Combination.ncr(2, -1);
+		Assert.assertEquals(-1, com1);
+	}
+	
+	@Test
+	public void test2() {
+		long com2 = Combination.ncr(-2, 1);
+		Assert.assertEquals(-1, com2);
+	}
+	
+	@Test 
+	public void test3() {
+		long com3 = Combination.ncr(2, 3);
+		Assert.assertEquals(-1, com3);
+	}
+	
+	@Test
+	public void test4() {
+		long com4 = Combination.ncr(6, 4);
+		Assert.assertEquals(15, com4);
+	}
+	
+	@Test
+	public void test5() {
+		long com5 = Combination.ncr(6, 0);
+		Assert.assertEquals(1, com5);
+	}
+}