Add FileUtilsTest.java , the unit test for FileUtils (#1493)

dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/utils/FileUtilsTest.java

@@ -0,0 +1,109 @@
+/*
+ * 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.api.utils;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.mockito.Mockito;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.core.io.Resource;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+
+import static org.junit.Assert.*;
+
+public class FileUtilsTest {
+
+    private static final Logger logger = LoggerFactory.getLogger(FileUtilsTest.class);
+
+    @Rule
+    public TemporaryFolder folder = null;
+
+    private String rootPath = null;
+
+    @Before
+    public void setUp() throws Exception {
+
+        folder = new TemporaryFolder();
+        folder.create();
+
+        rootPath = folder.getRoot().getAbsolutePath();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+
+        folder.delete();
+    }
+
+    /**
+     * Use mock to test copyFile
+     * @throws IOException
+     */
+    @Test
+    public void testCopyFile() throws IOException {
+
+        //Define dest file path
+        String destFilename = rootPath + System.getProperty("file.separator") + "data.txt";
+        logger.info("destFilename: "+destFilename);
+
+        //Define InputStream for MultipartFile
+        String data = "data text";
+        InputStream targetStream = new ByteArrayInputStream(data.getBytes());
+
+        //Use Mockito to mock MultipartFile
+        MultipartFile file = Mockito.mock(MultipartFile.class);
+        Mockito.when(file.getInputStream()).thenReturn(targetStream);
+
+        //Invoke copyFile
+        FileUtils.copyFile(file,destFilename);
+
+        //Test file exists
+        File destFile = new File(destFilename);
+        assertTrue(destFile.exists());
+
+    }
+
+    @Test
+    public void testFile2Resource() throws IOException {
+
+        //Define dest file path
+        String destFilename = rootPath + System.getProperty("file.separator") + "data.txt";
+        logger.info("destFilename: "+destFilename);
+
+        //Define test resource
+        File file = folder.newFile("resource.txt");
+
+        //Invoke file2Resource and test not null
+        Resource resource = FileUtils.file2Resource(file.getAbsolutePath());
+        assertNotNull(resource);
+
+        //Invoke file2Resource and test null
+        Resource resource1 = FileUtils.file2Resource(file.getAbsolutePath()+"abc");
+        assertNull(resource1);
+
+    }
+}

pom.xml

@@ -613,6 +613,7 @@
 				<configuration>
 					<includes>
 						<include>**/api/utils/CheckUtilsTest.java</include>
+						<include>**/api/utils/FileUtilsTest.java</include>
 						<include>**/common/graph/*.java</include>
 						<include>**/*CollectionUtilsTest.java</include><!--run test classes-->
 					</includes>