add some unit test

distribution/conf/application.properties.example

@@ -155,6 +155,7 @@ nacos.core.auth.enabled=false
 #nacos.core.auth.ldap.userDn=cn=admin,${nacos.core.auth.ldap.basedc}
 #nacos.core.auth.ldap.password=admin
 #nacos.core.auth.ldap.userdn=cn={0},dc=example,dc=org
+#nacos.core.auth.ldap.filter.prefix=uid
 
 
 ### The token expiration in seconds:

plugin-default-impl/src/test/java/com/alibaba/nacos/plugin/auth/impl/LdapAuthenticationProviderTest.java

@@ -0,0 +1,137 @@
+/*
+ * Copyright 1999-2021 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.auth.impl;
+
+import com.alibaba.nacos.plugin.auth.impl.constant.AuthConstants;
+import com.alibaba.nacos.plugin.auth.impl.persistence.RoleInfo;
+import com.alibaba.nacos.plugin.auth.impl.roles.NacosRoleServiceImpl;
+import com.alibaba.nacos.plugin.auth.impl.users.NacosUserDetailsServiceImpl;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.mockito.stubbing.Answer;
+import org.springframework.ldap.core.LdapTemplate;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.mockito.Mockito.when;
+
+@RunWith(MockitoJUnitRunner.class)
+public class LdapAuthenticationProviderTest {
+
+    @Mock
+    private NacosUserDetailsServiceImpl userDetailsService;
+
+    @Mock
+    private NacosRoleServiceImpl nacosRoleService;
+
+    @Mock
+    private LdapTemplate ldapTemplate;
+
+    private LdapAuthenticationProvider ldapAuthenticationProvider;
+
+    private List<RoleInfo> roleInfos = new ArrayList<>();
+
+    private final String adminUserName = "nacos";
+
+    private final String normalUserName = "normal";
+
+    private final String filterPrefix = "uid";
+
+    Method isAdmin;
+
+    Method ldapLogin;
+
+    private String defaultPassWord = "nacos";
+
+    @Before
+    public void setUp() throws NoSuchMethodException {
+        RoleInfo adminRole = new RoleInfo();
+        adminRole.setRole(AuthConstants.GLOBAL_ADMIN_ROLE);
+        adminRole.setUsername(adminUserName);
+        roleInfos.add(adminRole);
+        when(nacosRoleService.getRoles(adminUserName)).thenReturn(roleInfos);
+        when(nacosRoleService.getRoles(normalUserName)).thenReturn(new ArrayList<>());
+        when(ldapTemplate.authenticate("", "(" + filterPrefix + "=" + adminUserName + ")", defaultPassWord)).thenAnswer(
+                new Answer<Boolean>() {
+                    @Override
+                    public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                        Object[] args = invocation.getArguments();
+                        String b = (String) args[1];
+                        String c = (String) args[2];
+                        if (defaultPassWord.equals(c)) {
+                            return true;
+                        }
+                        return false;
+                    }
+                });
+        this.ldapAuthenticationProvider = new LdapAuthenticationProvider(ldapTemplate, userDetailsService,
+                nacosRoleService, filterPrefix);
+        isAdmin = LdapAuthenticationProvider.class.getDeclaredMethod("isAdmin", String.class);
+        isAdmin.setAccessible(true);
+        ldapLogin = LdapAuthenticationProvider.class.getDeclaredMethod("ldapLogin", String.class, String.class);
+        ldapLogin.setAccessible(true);
+    }
+
+    @Test
+    public void testIsAdmin() {
+        try {
+            Boolean result = (Boolean) isAdmin.invoke(ldapAuthenticationProvider, adminUserName);
+            Assert.assertTrue(result);
+        } catch (IllegalAccessException e) {
+            Assert.fail();
+        } catch (InvocationTargetException e) {
+            Assert.fail();
+        }
+        try {
+            Boolean result = (Boolean) isAdmin.invoke(ldapAuthenticationProvider, normalUserName);
+            Assert.assertTrue(!result);
+        } catch (IllegalAccessException e) {
+            Assert.fail();
+        } catch (InvocationTargetException e) {
+            Assert.fail();
+        }
+
+    }
+
+    @Test
+    public void testldapLogin() {
+        try {
+            Boolean result = (Boolean) ldapLogin.invoke(ldapAuthenticationProvider, adminUserName, defaultPassWord);
+            Assert.assertTrue(result);
+        } catch (IllegalAccessException e) {
+            Assert.fail();
+        } catch (InvocationTargetException e) {
+            Assert.fail();
+        }
+        try {
+            Boolean result = (Boolean) ldapLogin.invoke(ldapAuthenticationProvider, adminUserName, "123");
+            Assert.assertTrue(!result);
+        } catch (IllegalAccessException e) {
+            Assert.fail();
+        } catch (InvocationTargetException e) {
+            Assert.fail();
+        }
+    }
+}