diff --git a/src/toptal/README.md b/src/toptal/README.md
new file mode 100644
index 0000000..87af3a1
--- /dev/null
+++ b/src/toptal/README.md
@@ -0,0 +1,62 @@
+White Box Testing to function solution
+
+if (a == null || a.length == 0)
+
+    (1.1)             (1.2)
+return 0 (1.3)
+    
+if (a.length == 1)
+        (2 )  
+ 
+return 1 (3)
+ 
+Set seta  (4)  
+
+Set setb  (5) 
+
+Set setc  (6) 
+
+Set setd  (7)
+     
+for (8)
+
+double d (9)
+
+int x (10)
+
+int  y (11)      
+        
+if (x > 0 && y > 0) (12)   
+
+seta.add (12.1)
+
+else if (x < 0 && y > 0)(13)
+
+setb.add(13.1)
+
+else if (x < 0 && y < 0) (14)
+
+setc.add(14.1)
+
+else (15)
+
+setd.add(15.1)
+
+return 16
+
+=> Case Test
+
+    T1:(1.1) (1.3)
+    T2:(1.1) (1.2) (1.3)
+    T3:(1) (2) (3)
+    T4:(1) (2) (4) (5) (6) (7) (8) (9) (10) (11) (12) (12.1)
+    (9) (10) (11) (12) (13) (13.1)
+    (9) (10) (11) (12) (13) (14) (14.1)
+    (9) (10) (11) (12) (13) (14) (15) (15.1) (16)
+    T5:(1) (2) (4) (5) (6) (7) (8) (9) (10) (11) (12) (12.1)
+           (9) (10) (11) (12) (12.1) 
+           (9) (10) (11) (12) (12.1) (16)
+    ..T6,T7,T8 similar T5        
+           
+        
+        
diff --git a/src/toptal/TestingJunit.java b/src/toptal/TestingJunit.java
new file mode 100644
index 0000000..b6abd13
--- /dev/null
+++ b/src/toptal/TestingJunit.java
@@ -0,0 +1,54 @@
+import org.junit.Assert;
+import org.junit.Test;
+// White Box Testing
+public class TestingJunit {
+    First first =new First();
+
+    // Test  if (a == null || a.length == 0)
+    @Test
+    public void TestFirst1(){
+        Assert.assertEquals(0,first.solution(null));
+    }
+
+    // Test  if (a == null || a.length == 0)
+    @Test
+    public void TestFirst2(){
+        Assert.assertEquals(0,first.solution([]));
+    }
+
+    // Test if (a.length == 1)
+    @Test
+    public void TestFirst3(){
+        Assert.assertEquals(1,first.solution([{1,1}]);
+    }
+
+    // Test for and if
+    @Test
+    public void TestFirst4(){
+        Assert.assertEquals(4,first.solution([{1,1},{-1,1},{-1,-1},{1,-1}]));
+    }
+
+    // Test seta.add
+    @Test
+    public void TestFirst5(){
+        Assert.assertEquals(2,first.solution([{1,1},{4,4},{1,4}]));
+    }
+
+    // Test setb.add
+    @Test
+    public void TestFirst6(){
+        Assert.assertEquals(2,first.solution([{-1,1},{-4,4},{-1,4}]));
+    }
+
+    // Test setc.add
+    @Test
+    public void TestFirst7(){
+        Assert.assertEquals(2,first.solution([{-1,-1},{-4,-4},{-1,-4}]));
+    }
+
+    // Test setd.add
+    @Test
+    public void TestFirst8(){
+        Assert.assertEquals(2,first.solution([{1,-1},{4,-4},{1,-4}]));
+    }
+}
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