[test](ut) added UT cases for show create load stmt (#29564)

fe/fe-core/src/test/java/org/apache/doris/analysis/ShowCreateLoadStmtTest.java

@@ -0,0 +1,98 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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 org.apache.doris.analysis;
+
+import org.apache.doris.common.AnalysisException;
+import org.apache.doris.mysql.privilege.AccessControllerManager;
+import org.apache.doris.mysql.privilege.PrivPredicate;
+import org.apache.doris.qe.ConnectContext;
+import org.apache.doris.qe.SessionVariable;
+import org.apache.doris.qe.ShowResultSetMetaData;
+
+import mockit.Mock;
+import mockit.MockUp;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
+
+public class ShowCreateLoadStmtTest {
+    private Analyzer analyzer;
+    private ConnectContext ctx = new ConnectContext();
+
+    @Before
+    public void setUp() {
+        analyzer = AccessTestUtil.fetchAdminAnalyzer(true);
+        ctx.setSessionVariable(new SessionVariable());
+        ctx.setThreadLocalInfo();
+    }
+
+    @After
+    public void tearDown() {
+        ConnectContext.remove();
+    }
+
+    @Test
+    public void testAnalyse() throws Exception {
+        AtomicBoolean privilege = new AtomicBoolean(false);
+        AtomicReference<PrivPredicate> predicate = new AtomicReference<>(PrivPredicate.SHOW);
+        new MockUp<AccessControllerManager>() {
+            @Mock
+            public boolean checkGlobalPriv(ConnectContext ctx, PrivPredicate wanted) {
+                if (predicate.get().equals(wanted)) {
+                    return privilege.get();
+                }
+                return false;
+            }
+        };
+
+        /* case 1: Privilege */ {
+            ShowCreateLoadStmt stmt = new ShowCreateLoadStmt(new LabelName());
+            Assertions.assertThrows(AnalysisException.class, () -> stmt.analyze(analyzer));
+
+            predicate.set(PrivPredicate.ADMIN);
+            Assertions.assertThrows(AnalysisException.class, () -> stmt.analyze(analyzer));
+        }
+
+        /* case 2: labelName format */ {
+            ShowCreateLoadStmt stmt = new ShowCreateLoadStmt(new LabelName("", "12#3"));
+            predicate.set(PrivPredicate.ADMIN);
+            privilege.set(true);
+            Assertions.assertThrows(AnalysisException.class, () -> stmt.analyze(analyzer));
+        }
+
+        /* case 3: success */ {
+            ShowCreateLoadStmt stmt = new ShowCreateLoadStmt(new LabelName("", "ab12_3"));
+            predicate.set(PrivPredicate.ADMIN);
+            privilege.set(true);
+            stmt.analyze(analyzer);
+            Assertions.assertEquals(stmt.getDb(), "testDb");
+            Assertions.assertEquals(stmt.getLabel(), "ab12_3");
+        }
+    }
+
+    @Test
+    public void getMetaData() {
+        ShowCreateLoadStmt stmt = new ShowCreateLoadStmt(null);
+        ShowResultSetMetaData result = stmt.getMetaData();
+        Assertions.assertEquals(result.getColumnCount(), 2);
+    }
+}