[Add] Core 添加针对 JarFrameworkLoader 的完整单元测试;

[Add] JarFrameworkLoaderTest 添加完整单元测试类;

ContentGrabbingJi-core/src/test/java/net/lamgc/cgj/bot/framework/JarFrameworkLoaderTest.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2020  LamGC
+ *
+ * ContentGrabbingJi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * ContentGrabbingJi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.lamgc.cgj.bot.framework;
+
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.pf4j.ClassLoadingStrategy;
+import org.pf4j.PluginClassLoader;
+
+import java.io.IOException;
+import java.lang.reflect.Field;
+
+public class JarFrameworkLoaderTest {
+
+    private final static TemporaryFolder tempFolder = TemporaryFolder.builder().build();
+
+    @BeforeClass
+    public static void beforeClass() throws IOException {
+        tempFolder.create();
+    }
+
+    @Test
+    public void loaderCheck() throws IOException, NoSuchFieldException, IllegalAccessException {
+        ClassLoader classLoader = new JarFrameworkLoader(null)
+                .loadPlugin(tempFolder.newFile("invalid files").toPath(), null);
+        Assert.assertTrue(classLoader instanceof PluginClassLoader);
+        Field classLoadingStrategyField = PluginClassLoader.class.getDeclaredField("classLoadingStrategy");
+        classLoadingStrategyField.setAccessible(true);
+        ClassLoadingStrategy strategy = (ClassLoadingStrategy) classLoadingStrategyField.get(classLoader);
+        if (strategy.getSources().get(0) != ClassLoadingStrategy.Source.APPLICATION) {
+            Assert.fail("The class loading policy does not make application the first priority (First: " +
+                    strategy.getSources().get(0) + ").");
+        }
+    }
+
+}