Makes snapshot a vanilla version and loads all jars from the jars folder

src/test/java/net/knarcraft/minecraftserverlauncher/utility/JarDownloaderTest.java

@@ -0,0 +1,111 @@
+package net.knarcraft.minecraftserverlauncher.utility;
+
+import net.knarcraft.minecraftserverlauncher.Main;
+import net.knarcraft.minecraftserverlauncher.server.ServerTypeHandler;
+import net.knarcraft.minecraftserverlauncher.server.servertypes.ServerType;
+import net.knarcraft.minecraftserverlauncher.userinterface.FakeGUI;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import javax.naming.ConfigurationException;
+import java.io.File;
+import java.io.IOException;
+
+import static junit.framework.TestCase.assertNotNull;
+import static junit.framework.TestCase.assertTrue;
+
+public class JarDownloaderTest {
+    private static String targetDirectory;
+
+    @BeforeClass
+    public static void setUp() {
+        targetDirectory = Main.getApplicationWorkDirectory() + File.separator + "files" + File.separator +
+                "testjars" + File.separator;
+        removeDownloadedFiles();
+    }
+
+    @AfterClass
+    public static void cleanUp() {
+        removeDownloadedFiles();
+    }
+
+    @Test
+    public void downloadJarsTest() throws IOException {
+        JarDownloader downloader = new JarDownloader(new FakeGUI(), targetDirectory);
+        downloader.downloadJars();
+    }
+
+    @Test
+    public void spongeVanillaDownloadTest() throws IOException, ConfigurationException {
+        singleDownloadTest(ServerTypeHandler.getByName("SpongeVanilla"));
+    }
+
+    @Test
+    public void spigotDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("Spigot"));
+    }
+
+    @Test
+    public void mcpcPlusDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("MCPCplus"));
+    }
+
+    @Test
+    public void craftbukkitDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("Bukkit"));
+    }
+
+    @Test
+    public void paperDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("Paper"));
+    }
+
+    @Test
+    public void bungeeDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("Bungee"));
+    }
+
+    @Test
+    public void waterfallDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("Waterfall"));
+    }
+
+    @Test
+    public void travertineDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("Travertine"));
+    }
+
+    @Test
+    public void vanillaDownloadTest() throws ConfigurationException, IOException {
+        singleDownloadTest(ServerTypeHandler.getByName("Vanilla"));
+    }
+
+    /**
+     * Downloads all .jar files for a single server type and asserts it works
+     *
+     * @param serverType <p>The server type to test</p>
+     * @throws IOException <p>If unable to download any of the .jar files</p>
+     */
+    private void singleDownloadTest(ServerType serverType) throws IOException {
+        assertNotNull(serverType);
+        for (String serverVersion : serverType.getVersions()) {
+            System.out.println("Downloading " + serverType.getName() + serverVersion + ".jar");
+            serverType.downloadJar(targetDirectory, serverVersion);
+            assertTrue(new File(targetDirectory + serverType.getName() + serverVersion + ".jar").exists());
+        }
+    }
+
+    /**
+     * Removes downloaded test jars
+     */
+    private static void removeDownloadedFiles() {
+        File[] oldFiles = new File(targetDirectory).listFiles();
+        if (oldFiles == null) {
+            throw new IllegalArgumentException("Unable to list files in jar test directory");
+        }
+        for (File file : oldFiles) {
+            assertTrue(file.delete());
+        }
+    }
+}