delete dup code

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

@@ -35,15 +35,11 @@ public class ScriptRunnerTest {
         Assert.assertNotNull(exception);
 
         //connect is not null
-        try {
-            ScriptRunner s2 = getScriptRunner();
-            s2.runScript(new StringReader("select 1;"));
-        } catch(Exception e) {
-            Assert.assertNotNull(e);
-        }
+        runScript("");
     }
 
-    private ScriptRunner getScriptRunner() throws SQLException {
+    private void runScript(String dbName) {
+        try {
             Connection conn = Mockito.mock(Connection.class);
             Mockito.when(conn.getAutoCommit()).thenReturn(true);
             PreparedStatement st = Mockito.mock(PreparedStatement.class);
@@ -54,18 +50,21 @@ public class ScriptRunnerTest {
             Mockito.when(rs.getMetaData()).thenReturn(md);
             Mockito.when(md.getColumnCount()).thenReturn(1);
             Mockito.when(rs.next()).thenReturn(true, false);
-        ScriptRunner s2 = new ScriptRunner(conn, true, true);
+            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
-        try {
-            ScriptRunner s = getScriptRunner();
-            s.runScript(new StringReader("select 1;"), "test_db");
-        } catch(Exception e) {
-            Assert.assertNotNull(e);
-        }
+        runScript("db_test");
     }
 }