add 12 unit test

src/main/BalancedBrackets.java

@@ -32,4 +32,12 @@ public static boolean hasBalancedBrackets(String str) {
         }
         return brackets == 0;
     }
+
+    public static void main(String[] args) {
+        if(hasBalancedBrackets("[]")==true){
+            System.out.println("true");
+        }else{
+            System.out.println("false");
+        }
+    }
 }

src/test/BalancedBracketsTest.java

@@ -1,16 +1,82 @@
 package test;
 
+import main.BalancedBrackets;
 import org.junit.Test;
-
 import static org.junit.Assert.*;
+import org.junit.Before;
 
 public class BalancedBracketsTest {
 
-    //TODO: add tests here
+    BalancedBrackets test_brackets;
+    @Before
+    public void createBalancedBracketsObject(){
+        test_brackets = new BalancedBrackets();
+    }
     @Test
     public void emptyTest() {
+
         assertEquals(true, true);
     }
 
+    @Test
+    public void onlyBracketsReturnsTrue() {
+        assertTrue(BalancedBrackets.hasBalancedBrackets("[]"));
+    }
+
+    @Test
+    public void onlyBracketsReturnsFalse() {
+        assertFalse(BalancedBrackets.hasBalancedBrackets("[["));
+    }
+
+    @Test
+    public void onlyBracketsReturnsTrueOrFalse() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[]"));
+    }
+
+    @Test
+    public void onlyBracketsTestWord1() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[LaunchCode]"));
+    }
+
+    @Test
+    public void onlyBracketsTestWord2() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("Launch[Code]"));
+    }
+
+    @Test
+    public void onlyBracketsTestWord3() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[]LaunchCode"));
+    }
+
+    @Test
+    public void onlyBracketsTestWord4() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[]]["));
+    }
+
+    @Test
+    public void onlyBracketsTestWord5() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[[]][]"));
+    }
+
+    @Test
+    public void onlyBracketsTestWord6() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[[]][]"));
+    }
+
+    @Test
+    public void onlyBracketsTestWord7() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[[])(]"));
+    }
+
+    @Test
+    public void onlyBracketsTestWord8() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets(""));
+    }
+
+    @Test
+    public void onlyBracketsTestSentence() {
+        assertEquals(true, BalancedBrackets.hasBalancedBrackets("[LaunchCode], Launch[Code], []LaunchCode, []"));
+    }
+
 
 }