Merge pull request #1909 from khadgarmage/ut-scriptrunner

add ScriptRunnerTest.java unit test

dolphinscheduler-common/src/test/java/org/apache/dolphinscheduler/common/utils/ScriptRunnerTest.java

+/*
+ * 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.dolphinscheduler.common.utils;
+import org.junit.Assert;
+import org.junit.Test;
+import org.mockito.Mockito;
+import java.io.StringReader;
+import java.sql.*;
+
+public class ScriptRunnerTest {
+    @Test
+    public void testRunScript() {
+        //connection is null
+        Exception exception = null;
+        ScriptRunner s = new ScriptRunner(null, true, true);
+        try {
+            s.runScript(new StringReader("select 1"));
+        } catch (Exception e) {
+            exception = e;
+        }
+        Assert.assertNotNull(exception);
+
+        //connect is not null
+        runScript("");
+    }
+
+    private void runScript(String dbName) {
+        try {
+            Connection conn = Mockito.mock(Connection.class);
+            Mockito.when(conn.getAutoCommit()).thenReturn(true);
+            PreparedStatement st = Mockito.mock(PreparedStatement.class);
+            Mockito.when(conn.createStatement()).thenReturn(st);
+            ResultSet rs = Mockito.mock(ResultSet.class);
+            Mockito.when(st.getResultSet()).thenReturn(rs);
+            ResultSetMetaData md = Mockito.mock(ResultSetMetaData.class);
+            Mockito.when(rs.getMetaData()).thenReturn(md);
+            Mockito.when(md.getColumnCount()).thenReturn(1);
+            Mockito.when(rs.next()).thenReturn(true, false);
+            ScriptRunner s = new ScriptRunner(conn, true, true);
+            if (dbName.isEmpty()) {
+                s.runScript(new StringReader("select 1;"));
+            } else {
+                s.runScript(new StringReader("select 1;"), dbName);
+            }
+            Mockito.verify(md).getColumnLabel(0);
+        } catch(Exception e) {
+            Assert.assertNotNull(e);
+        }
+    }
+
+    @Test
+    public void testRunScriptWithDbName() {
+        //connect is not null
+        runScript("db_test");
+    }
+}