Update README.md

java-numbers-2/src/test/java/com/baeldung/numbersinrange/NumbersInARangeUnitTest.java

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+package com.baeldung.numbersinrange;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.Test;
+
+public class NumbersInARangeUnitTest {
+
+    @Test
+    public void givenTheRange1To10_andUsingForLoop_thenExpectCorrectResult() {
+        NumbersInARange numbersInARange = new NumbersInARange();
+        List<Integer> numbers = numbersInARange.getNumbersInRange(1, 10);
+        
+        assertEquals(Arrays.asList(1,2,3,4,5,6,7,8,9), numbers);
+    }
+    
+    @Test
+    public void givenTheRange1To10_andUsingIntStreamRange_thenExpectCorrectResult() {
+        NumbersInARange numbersInARange = new NumbersInARange();
+        List<Integer> numbers = numbersInARange.getNumbersUsingIntStreamRange(1, 10);
+        
+        assertEquals(Arrays.asList(1,2,3,4,5,6,7,8,9), numbers);
+    }
+    
+    @Test
+    public void givenTheRange1To10_andUsingIntStreamRangeClosed_thenExpectCorrectResult() {
+        NumbersInARange numbersInARange = new NumbersInARange();
+        List<Integer> numbers = numbersInARange.getNumbersUsingIntStreamRangeClosed(1, 10);
+        
+        assertEquals(Arrays.asList(1,2,3,4,5,6,7,8,9,10), numbers);
+    }
+    
+    @Test
+    public void givenTheRange1To10_andUsingIntStreamIterate_thenExpectCorrectResult() {
+        NumbersInARange numbersInARange = new NumbersInARange();
+        List<Integer> numbers = numbersInARange.getNumbersUsingIntStreamIterate(1, 10);
+        
+        assertEquals(Arrays.asList(1,2,3,4,5,6,7,8,9,10), numbers);
+    }
+}