@Test
public void materializedColShouldBeWritten() throws Exception {
File textFile = tmpDir.copyResourceFile("shakes.txt");
Pipeline pipeline = new MRPipeline(MRPipelineIT.class, tmpDir.getDefaultConfiguration());
PCollection<String> genericCollection = pipeline.readTextFile(textFile.getAbsolutePath());
pipeline.run();
PCollection<String> filter =
genericCollection.filter("Filtering data", FilterFns.<String>ACCEPT_ALL());
filter.materialize();
pipeline.run();
File file = tmpDir.getFile("output.txt");
Target outFile = To.textFile(file.getAbsolutePath());
PCollection<String> write = filter.write(outFile);
write.materialize();
pipeline.run();
}
