Add more tests

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

src/test/java/com/myapp/CalculatorTest.java

@@ -32,4 +32,20 @@ public class CalculatorTest {
         Assert.assertEquals(res, 30);
     }
 
+
+    @Test
+    public void assertNotNull() {
+        Calculator calc = new Calculator();
+        Assert.assertNotNull(calc);
+    }
+
+
+    @Test public void assertNull() {
+        Calculator calc = new Calculator();
+        Assert.assertNull("Failed: Not Null", calc);
+    }
+
+
+
+
 }

src/test/java/com/myapp/StringsTest.java

@@ -11,6 +11,8 @@ import java.util.List;
 
 public class StringsTest {
 
+    String string;
+
 
     @Before
     public void beforeTest() {
@@ -46,13 +48,39 @@ public class StringsTest {
 
     @Test
     public void testEvenWordsInSent() {
-        List<String> evens = new Strings().evenWordsInSent("This is a sentence with even and odd words");
-        List<String> actual = Arrays.asList("This", "is", "sentence", "with", "even");
+        String sentence = "This is a sentence with even and odd words";
+        List<String> expected = new Strings().evenWordsInSent(sentence);
+        List<String> actual = Arrays.asList(sentence.split(" "));
+//        List<String> actual = Arrays.asList("This", "is", "sentence", "with", "even");
+
+//        Assert.assertEquals("Failed", expected, actual);
+        Assert.assertNotEquals(expected, actual);
+
+    }
+
+
+    @Test
+    public void assertNotEquals() {
+        String sentence = "This is a sentence with even and odd words";
+        List<String> expected = new Strings().evenWordsInSent(sentence);
+        List<String> actual = Arrays.asList(sentence.split(" "));
 
-        Assert.assertEquals(evens, actual);
+        Assert.assertNotEquals(expected, actual);
     }
 
 
+    @Test
+    public void assertNotSame() {
+        String sentence = "This is a sentence with even and odd words";
+        List<String> expected = new Strings().evenWordsInSent(sentence);
+        List<String> actual = Arrays.asList(sentence.split(" "));
+
+        Assert.assertNotSame("Failed: expected and actual are the same", expected, actual);
+    }
+
+
+
+
     @AfterClass
     //must be static bc its a class method
     public static void afterClass() {