java-tutorials/aws/src/test/java/com/baeldung/s3/AWSS3ServiceIntegrationTest.java

package com.baeldung.s3;

import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.io.File;

import org.junit.Before;
import org.junit.Test;

import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.CopyObjectResult;
import com.amazonaws.services.s3.model.DeleteObjectsRequest;
import com.amazonaws.services.s3.model.DeleteObjectsResult;
import com.amazonaws.services.s3.model.PutObjectResult; 

public class AWSS3ServiceIntegrationTest {

    private static final String BUCKET_NAME = "bucket_name"; 
    private static final String KEY_NAME = "key_name"; 
    private static final String BUCKET_NAME2 = "bucket_name2"; 
    private static final String KEY_NAME2 = "key_name2"; 
 
    private AmazonS3 s3; 
    private AWSS3Service service; 
 
    @Before 
    public void setUp() { 
        s3 = mock(AmazonS3.class); 
        service = new AWSS3Service(s3); 
    } 
 
    @Test 
    public void whenInitializingAWSS3Service_thenNotNull() { 
        assertThat(new AWSS3Service()).isNotNull(); 
    } 
    
    @Test 
    public void whenVerifyingIfS3BucketExist_thenCorrect() { 
        service.doesBucketExist(BUCKET_NAME); 
        verify(s3).doesBucketExist(BUCKET_NAME); 
    } 
 
    @Test 
    public void whenVerifyingCreationOfS3Bucket_thenCorrect() { 
        service.createBucket(BUCKET_NAME); 
        verify(s3).createBucket(BUCKET_NAME); 
    } 
 
    @Test 
    public void whenVerifyingListBuckets_thenCorrect() { 
        service.listBuckets(); 
        verify(s3).listBuckets(); 
    } 

    @Test 
    public void whenDeletingBucket_thenCorrect() { 
        service.deleteBucket(BUCKET_NAME); 
        verify(s3).deleteBucket(BUCKET_NAME); 
    } 
    
    @Test 
    public void whenVerifyingPutObject_thenCorrect() { 
        File file = mock(File.class); 
        PutObjectResult result = mock(PutObjectResult.class); 
        when(s3.putObject(anyString(), anyString(), (File) any())).thenReturn(result); 
 
        assertThat(service.putObject(BUCKET_NAME, KEY_NAME, file)).isEqualTo(result); 
        verify(s3).putObject(BUCKET_NAME, KEY_NAME, file); 
    }
    
    @Test 
    public void whenVerifyingListObjects_thenCorrect() { 
        service.listObjects(BUCKET_NAME); 
        verify(s3).listObjects(BUCKET_NAME); 
    } 
    
    @Test 
    public void whenVerifyingGetObject_thenCorrect() { 
        service.getObject(BUCKET_NAME, KEY_NAME); 
        verify(s3).getObject(BUCKET_NAME, KEY_NAME); 
    } 
    
    @Test 
    public void whenVerifyingCopyObject_thenCorrect() { 
        CopyObjectResult result = mock(CopyObjectResult.class); 
        when(s3.copyObject(anyString(), anyString(), anyString(), anyString())).thenReturn(result); 
 
        assertThat(service.copyObject(BUCKET_NAME, KEY_NAME, BUCKET_NAME2, KEY_NAME2)).isEqualTo(result); 
        verify(s3).copyObject(BUCKET_NAME, KEY_NAME, BUCKET_NAME2, KEY_NAME2);
    } 
    
    @Test 
    public void whenVerifyingDeleteObject_thenCorrect() { 
        service.deleteObject(BUCKET_NAME, KEY_NAME); 
        verify(s3).deleteObject(BUCKET_NAME, KEY_NAME); 
    }
    
    @Test 
    public void whenVerifyingDeleteObjects_thenCorrect() { 
        DeleteObjectsRequest request = mock(DeleteObjectsRequest.class);
        DeleteObjectsResult result = mock(DeleteObjectsResult.class);
        when(s3.deleteObjects((DeleteObjectsRequest)any())).thenReturn(result); 
        
        assertThat(service.deleteObjects(request)).isEqualTo(result);
        verify(s3).deleteObjects(request); 
    }
    
}