Add plugin utility test

lib/src/test/kotlin/foundation/esoteric/minecraft/plugins/library/utility/plugin/PluginUtilityTest.kt

@@ -0,0 +1,38 @@
+package foundation.esoteric.minecraft.plugins.library.utility.plugin
+
+import be.seeseemelk.mockbukkit.MockBukkit
+import foundation.esoteric.minecraft.plugins.library.TestPlugin
+import java.io.File
+import kotlin.io.path.Path
+import kotlin.test.*
+
+class PluginUtilityTest {
+
+    private lateinit var plugin: TestPlugin
+
+    @BeforeTest fun mockPlugin() {
+        MockBukkit.mock()
+        plugin = MockBukkit.load(TestPlugin::class.java)
+    }
+
+    @Test fun savingFolderWorks() {
+        val resourcesPath = Path("TestPluginResourcePack")
+        val file = File(plugin.dataFolder, resourcesPath.toString())
+
+        plugin.saveResources(resourcesPath)
+        assertTrue(file.exists())
+        assertTrue(file.isDirectory)
+        assertFalse(file.isFile)
+        assertNotNull(file.listFiles())
+        assertEquals(1, file.listFiles()!!.size)
+
+        val packFile = File(file, "pack.mcmeta")
+        assertTrue(packFile.exists())
+        assertTrue(packFile.isFile)
+        assertFalse(packFile.isDirectory)
+    }
+
+    @AfterTest fun unmockPlugin() {
+        MockBukkit.unmock()
+    }
+}