Added tests with GridFSTemplate

spring-data-mongodb/src/main/java/org/baeldung/config/MongoConfig.java

@@ -10,6 +10,7 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.mongodb.config.AbstractMongoConfiguration;
 import org.springframework.data.mongodb.core.convert.CustomConversions;
+import org.springframework.data.mongodb.gridfs.GridFsTemplate;
 import org.springframework.core.convert.converter.Converter;
 import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
 
@@ -52,4 +53,9 @@ public class MongoConfig extends AbstractMongoConfiguration {
         converters.add(new UserWriterConverter());
         return new CustomConversions(converters);
     }
+    
+    @Bean
+    public GridFsTemplate gridFsTemplate() throws Exception {
+        return new GridFsTemplate(mongoDbFactory(), mappingMongoConverter());
+    }
 }

spring-data-mongodb/src/test/java/org/baeldung/gridfs/GridFSTest.java

@@ -0,0 +1,186 @@
+package org.baeldung.gridfs;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.Matchers.nullValue;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThat;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+
+import org.baeldung.config.MongoConfig;
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.mongodb.core.query.Criteria;
+import org.springframework.data.mongodb.core.query.Query;
+import org.springframework.data.mongodb.gridfs.GridFsResource;
+import org.springframework.data.mongodb.gridfs.GridFsTemplate;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.mongodb.BasicDBObject;
+import com.mongodb.DBObject;
+import com.mongodb.gridfs.GridFSDBFile;
+
+@ContextConfiguration(classes = MongoConfig.class)
+@RunWith(SpringJUnit4ClassRunner.class)
+public class GridFSTest {
+    
+    private final Logger logger = LoggerFactory.getLogger(getClass());
+       
+    @Autowired
+    private GridFsTemplate gridFsTemplate;
+     
+    @After
+    public void tearDown() {
+        List<GridFSDBFile> fileList = gridFsTemplate.find(null);
+        for(GridFSDBFile file: fileList) {
+            gridFsTemplate.delete(new Query(Criteria.where("filename").is(file.getFilename())));
+        }
+    }
+
+    @Test
+    public void whenStoringFileWithMetadata_thenFileAndMetadataAreStored() {
+        DBObject metaData = new BasicDBObject();
+        metaData.put("key", "value");
+        InputStream inputStream = null;
+        String id = "";
+
+        try {
+            inputStream = new FileInputStream("src/main/resources/test.png");
+            id = gridFsTemplate.store(inputStream, "test.png", "image/png", metaData).getId().toString();
+        } catch (FileNotFoundException ex) {
+            logger.error("", ex);
+        } finally {
+            if (inputStream != null) {
+                try {
+                    inputStream.close();
+                } catch (IOException ex) {
+                    logger.error("", ex);
+                }
+            }
+        }
+
+        assertNotNull(id);
+    }
+
+    @Test
+    public void givenFileWithMetadataExist_whenFindingFileById_thenFileWithMetadataIsFound() {
+        DBObject metaData = new BasicDBObject();
+        metaData.put("key", "value");
+        InputStream inputStream = null;
+        String id = "";
+
+        try {
+            inputStream = new FileInputStream("src/main/resources/test.png");
+            id = gridFsTemplate.store(inputStream, "test.png", "image/png", metaData).getId().toString();
+        } catch (FileNotFoundException ex) {
+            logger.error("", ex);
+        } finally {
+            if (inputStream != null) {
+                try {
+                    inputStream.close();
+                } catch (IOException ex) {
+                    logger.error("", ex);
+                }
+            }
+        }
+        
+        GridFSDBFile gridFSDBFile = gridFsTemplate.findOne(new Query(Criteria.where("_id").is(id)));
+             
+        assertNotNull(gridFSDBFile);
+        assertThat(gridFSDBFile.getFilename(), is("test.png"));
+        assertThat(gridFSDBFile.getMetaData().get("key"), is("value"));
+    }
+
+    @Test
+    public void givenMetadataAndFilesExist_whenFindingAllFiles_thenFilesWithMetadataAreFound() {
+        DBObject metaData = new BasicDBObject();
+        metaData.put("key", "value");
+        InputStream inputStream = null;
+
+        try {
+            inputStream = new FileInputStream("src/main/resources/test.png");
+            gridFsTemplate.store(inputStream, "test.png", "image/png", metaData);
+            gridFsTemplate.store(inputStream, "test.png", "image/png", metaData);
+        } catch (FileNotFoundException ex) {
+            logger.error("", ex);
+        } finally {
+            if (inputStream != null) {
+                try {
+                    inputStream.close();
+                } catch (IOException ex) {
+                    logger.error("", ex);
+                }
+            }
+        }
+        
+        List<GridFSDBFile> gridFSDBFiles = gridFsTemplate.find(null);
+        
+        assertNotNull(gridFSDBFiles);
+        assertThat(gridFSDBFiles.size(), is(2));
+    }
+    
+    
+    @Test
+    public void givenFileWithMetadataExist_whenDeletingFileById_thenFileWithMetadataIsDeleted() {
+        DBObject metaData = new BasicDBObject();
+        metaData.put("key", "value");
+        InputStream inputStream = null;
+        String id = "";
+
+        try {
+            inputStream = new FileInputStream("src/main/resources/test.png");
+            id = gridFsTemplate.store(inputStream, "test.png", "image/png", metaData).getId().toString();
+        } catch (FileNotFoundException ex) {
+            logger.error("", ex);
+        } finally {
+            if (inputStream != null) {
+                try {
+                    inputStream.close();
+                } catch (IOException ex) {
+                    logger.error("", ex);
+                }
+            }
+        }
+        
+        gridFsTemplate.delete(new Query(Criteria.where("_id").is(id)));
+             
+        assertThat(gridFsTemplate.findOne(new Query(Criteria.where("_id").is(id))), is(nullValue()));
+    }
+    
+    @Test
+    public void givenFileWithMetadataExist_whenGettingFileByResource_thenFileWithMetadataIsGotten() {
+        DBObject metaData = new BasicDBObject();
+        metaData.put("key", "value");
+        InputStream inputStream = null;
+        String id = "";
+
+        try {
+            inputStream = new FileInputStream("src/main/resources/test.png");
+            id = gridFsTemplate.store(inputStream, "test.png", "image/png", metaData).getId().toString();
+        } catch (FileNotFoundException ex) {
+            logger.error("", ex);
+        } finally {
+            if (inputStream != null) {
+                try {
+                    inputStream.close();
+                } catch (IOException ex) {
+                    logger.error("", ex);
+                }
+            }
+        }
+        
+        GridFsResource[] gridFsResource = gridFsTemplate.getResources("test*");
+             
+        assertNotNull(gridFsResource);
+        assertThat(gridFsResource[0].getFilename(), is("test.png"));
+    }
+}