This should fix all issues regarding the "latest" version for all server types

src/test/java/net/knarcraft/minecraftserverlauncher/server/ServerVersionContainerTest.java

@@ -0,0 +1,38 @@
+package net.knarcraft.minecraftserverlauncher.server;
+
+import net.knarcraft.minecraftserverlauncher.Main;
+import net.knarcraft.minecraftserverlauncher.utility.CommonFunctions;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.*;
+
+import static junit.framework.TestCase.assertEquals;
+
+public class ServerVersionContainerTest {
+
+    private String versionFile = Main.getApplicationWorkDirectory() + File.separator + "files" + File.separator + "versions.csv";
+    private ServerVersionContainer serverVersionContainer;
+
+    @Before
+    public void setUp() {
+        serverVersionContainer = ServerVersionContainer.getInstance();
+    }
+
+    @Test
+    public void toStringTest() {
+        serverVersionContainer.reset();
+        assertEquals("vanillaVersion;null\nsnapshotVersion;null\nbungeeVersion;null\nwaterfallVersion;null\n" +
+                        "travertineVersion;null\nspongeVanillaVersions;",
+                serverVersionContainer.toString());
+    }
+
+    @Test
+    public void saveStateTest() throws IOException {
+        serverVersionContainer.saveState();
+        BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(versionFile)));
+        String savedData = CommonFunctions.readBufferedReader(reader);
+        assertEquals(serverVersionContainer.toString(), savedData);
+    }
+
+}