[Add][Update] CacheStore-API 添加新的测试, 并完善其他测试;

[Add] GetCacheStoreExceptionTest 添加针对 GetCacheStoreExceptionTest 的测试项;
[Update] HashSingleCacheStoreTest 完善单元测试项;

ContentGrabbingJi-CacheStore-api/src/test/java/net/lamgc/cgj/bot/cache/exception/GetCacheStoreExceptionTest.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2021  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.cache.exception;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class GetCacheStoreExceptionTest {
+
+    @Test
+    public void messageCheck() {
+        final String message = "uncaught exception";
+        Assert.assertEquals(message, new GetCacheStoreException(message).getMessage());
+    }
+
+    @Test
+    public void causeCheck() {
+        final String message = "uncaught exception";
+        final Throwable cause = new IllegalStateException();
+
+        Assert.assertEquals(cause, new GetCacheStoreException(message, cause).getCause());
+    }
+
+}