package com.thinkbiganalytics.nifi.v2.hdfs;
/*-
* #%L
* thinkbig-nifi-hadoop-processors
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* Licensed 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.
* #L%
*/
import com.google.common.collect.ImmutableMap;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.nifi.components.ValidationResult;
import org.apache.nifi.processor.ProcessContext;
import org.apache.nifi.util.MockProcessContext;
import org.apache.nifi.util.TestRunner;
import org.apache.nifi.util.TestRunners;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.InOrder;
import org.mockito.Mockito;
import java.io.IOException;
import java.util.Collection;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
public class RemoveHDFSFolderTest {
/**
* Mock file system
*/
private final FileSystem fileSystem = Mockito.mock(FileSystem.class);
/**
* Test runner
*/
private final TestRunner runner = TestRunners.newTestRunner(new TestableRemoveHDFSFolder());
/**
* Initialize instance variables
*/
@Before
public void setUp() throws Exception {
// Setup mock file system
Mockito.when(fileSystem.delete(Mockito.any(Path.class), Mockito.eq(true))).thenReturn(true);
// Setup test runner
runner.setValidateExpressionUsage(false);
}
/**
* Verify property validators.
*/
@Test
public void testValidators() {
// Test with no properties
Collection<ValidationResult> results = validate(runner);
Assert.assertEquals(1, results.size());
results.forEach((ValidationResult result) -> Assert.assertEquals("'Directory' is invalid because Directory is required", result.toString()));
// Test with empty directory
runner.setProperty(RemoveHDFSFolder.DIRECTORY, "");
results = validate(runner);
Assert.assertEquals(1, results.size());
results.forEach((ValidationResult result) -> Assert.assertEquals("'Directory' validated against '' is invalid because Directory cannot be empty", result.toString()));
// Test with valid properties
runner.setProperty(RemoveHDFSFolder.DIRECTORY, "/target");
results = validate(runner);
Assert.assertEquals(0, results.size());
}
/**
* Verify removing folders.
*/
@Test
public void testRemoveFolder() throws Exception {
// Test removing folders
runner.setProperty(RemoveHDFSFolder.DIRECTORY, "/target/\n /etl/${category}/${feed}/ \r\n");
runner.enqueue(new byte[0], ImmutableMap.of("category", "movies", "feed", "actors"));
runner.run();
// Check relationships
Assert.assertEquals(0, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_FAILURE).size());
Assert.assertEquals(1, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_SUCCESS).size());
// Check file system calls
InOrder inOrder = Mockito.inOrder(fileSystem);
inOrder.verify(fileSystem).delete(new Path("/target"), true);
inOrder.verify(fileSystem).delete(new Path("/etl/movies/actors"), true);
inOrder.verifyNoMoreInteractions();
}
/**
* Verify failure for double slashes.
*/
@Test
public void testRemoveFolderWithDoubleSlash() throws Exception {
runner.setProperty(RemoveHDFSFolder.DIRECTORY, "/target//path/");
runner.enqueue(new byte[0]);
runner.run();
Assert.assertEquals(1, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_FAILURE).size());
Assert.assertEquals(0, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_SUCCESS).size());
Mockito.verifyZeroInteractions(fileSystem);
}
/**
* Verify failure for folders with a relative path.
*/
@Test
public void testRemoveFolderWithRelativePath() throws Exception {
runner.setProperty(RemoveHDFSFolder.DIRECTORY, "target/");
runner.enqueue(new byte[0]);
runner.run();
Assert.assertEquals(1, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_FAILURE).size());
Assert.assertEquals(0, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_SUCCESS).size());
Mockito.verifyZeroInteractions(fileSystem);
}
/**
* Verify failure for missing trailing slash.
*/
@Test
public void testRemoveFolderWithTrailingSlash() throws Exception {
runner.setProperty(RemoveHDFSFolder.DIRECTORY, "/target");
runner.enqueue(new byte[0]);
runner.run();
Assert.assertEquals(1, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_FAILURE).size());
Assert.assertEquals(0, runner.getFlowFilesForRelationship(RemoveHDFSFolder.REL_SUCCESS).size());
Mockito.verifyZeroInteractions(fileSystem);
}
/**
* Enqueues a {@code FlowFile} and validates its properties.
*
* @param runner the test runner
* @return the validation results
*/
@Nonnull
private Collection<ValidationResult> validate(@Nonnull final TestRunner runner) {
runner.enqueue(new byte[0]);
return ((MockProcessContext) runner.getProcessContext()).validate();
}
/**
* A mock {@code RemoveHDFSFolder} for testing.
*/
private class TestableRemoveHDFSFolder extends RemoveHDFSFolder {
@Nullable
@Override
protected FileSystem getFileSystem(@Nonnull ProcessContext context) {
return fileSystem;
}
@Override
HdfsResources resetHDFSResources(String configResources, String dir, ProcessContext context) throws IOException {
return null;
}
}
}