Add JUnit for RemoveExtraSpace Project

Author: Frankie2101

src/main/java/com/rampatra/strings/Junit/RemoveExtraSpacesTest.java

@@ -0,0 +1,40 @@
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class RemoveExtraSpacesTest {
+
+    String stringTest1 = "Test with no extra space";
+    String stringTest2 = "Test with extra   space";
+    String stringTest3 = "  Test with extra space at the beginning";
+    String stringTest4 = "Test with extra space at the end    ";
+
+    @Test
+    public void RemoveSpaceWithNoExtraSpace () {
+        String expectedResult = "Test with no extra space";
+        String actualResult = Main.removeExtraSpaces(stringTest1);
+        assertEquals(expectedResult, actualResult);
+    }
+
+    @Test
+    public void RemoveSpaceWithExtraSpace () {
+        String expectedResult = "Test with extra space";
+        String actualResult = Main.removeExtraSpaces(stringTest2);
+        assertEquals(expectedResult, actualResult);
+    }
+
+    @Test
+    public void RemoveSpaceWithSpaceAtBeginning () {
+        String expectedResult = "Test with extra space at the beginning";
+        String actualResult = Main.removeExtraSpaces(stringTest3);
+        assertEquals(expectedResult, actualResult);
+    }
+
+    @Test
+    public void RemoveSpaceWithSpaceAtEnd () {
+        String expectedResult = "Test with extra space at the end";
+        String actualResult = Main.removeExtraSpaces(stringTest4);
+        assertEquals(expectedResult, actualResult);
+    }
+}