Add unit tests to TeantInfoMapperByMySql class (#9532)

plugin/datasource/src/test/java/com/alibaba/nacos/plugin/datasource/impl/mysql/TenantInfoMapperByMySqlTest.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 1999-2022 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.alibaba.nacos.plugin.datasource.impl.mysql;
+
+import com.alibaba.nacos.plugin.datasource.constants.DataSourceConstant;
+import com.alibaba.nacos.plugin.datasource.constants.TableConstant;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class TenantInfoMapperByMySqlTest {
+    
+    private TenantInfoMapperByMySql tenantInfoMapperByMySql;
+    
+    @Before
+    public void setUp() throws Exception {
+        tenantInfoMapperByMySql = new TenantInfoMapperByMySql();
+    }
+    
+    @Test
+    public void testGetTableName() {
+        String tableName = tenantInfoMapperByMySql.getTableName();
+        Assert.assertEquals(tableName, TableConstant.TENANT_INFO);
+    }
+    
+    @Test
+    public void testGetDataSource() {
+        String dataSource = tenantInfoMapperByMySql.getDataSource();
+        Assert.assertEquals(dataSource, DataSourceConstant.MYSQL);
+    }
+}