Added and rewrote tests

src/test/java/de/rwu/easydrop/util/FormattingUtilTest.java

@@ -1,5 +1,6 @@
 package de.rwu.easydrop.util;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -55,4 +56,17 @@ class FormattingUtilTest {
 
         Assertions.assertEquals(expectedFormattedAmount, formattedAmount);
     }
+
+    @Test
+    void testRemoveSpaces_RemovesAllSpaces() {
+        String test1 = FormattingUtil.removeSpaces("this is a test");
+        String test2 = FormattingUtil.removeSpaces("another test");
+        String test3 = FormattingUtil.removeSpaces(" daring today,  aren't we? ");
+        String test4 = FormattingUtil.removeSpaces("hehe");
+
+        assertEquals("thisisatest", test1);
+        assertEquals("anothertest", test2);
+        assertEquals("daringtoday,aren'twe?", test3);
+        assertEquals("hehe", test4);
+    }
 }