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Merged
jabrena merged 1 commit into from
Jan 3, 2021
Merged

Add another concurrency test for DataChannelRereader #784

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78 changes: 78 additions & 0 deletions src/test/java/ev3dev/utils/DataChannelRereader2RaceTest.java
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Original file line number Diff line number Diff line change
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package ev3dev.utils;

import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.concurrent.CompletableFuture;
import java.util.stream.IntStream;

import static org.assertj.core.api.BDDAssertions.then;

@Slf4j
public class DataChannelRereader2RaceTest {

final String fileName = "./race2.txt";
final Integer limit = 10000;

@Before
@SneakyThrows
public void createFiles() throws IOException {
Files.writeString(Path.of(fileName), "test1234");
}

/**
* Reader1 <- race.txt
* Reader2 <- race.txt
* Reader3 <- race.txt
* Reader4 <- race.txt
*/
@Test
public void given_multiple_DataChannelRereader_when_execute_concurrently_then_Ok() {
DataChannelRereader2 reader = new DataChannelRereader2(fileName);

CompletableFuture<String> rq1 = asyncReadFile(reader);
CompletableFuture<String> rq2 = asyncReadFile(reader);
CompletableFuture<String> rq3 = asyncReadFile(reader);
CompletableFuture<String> rq4 = asyncReadFile(reader);

CompletableFuture<Void> combinedFuture = CompletableFuture.allOf(rq1, rq2, rq3, rq4);
combinedFuture.join();

then(rq1.isDone()).isTrue();
then(rq2.isDone()).isTrue();
then(rq3.isDone()).isTrue();
then(rq4.isDone()).isTrue();

then(rq1.join()).isEqualTo("Ok asyncReadFile");
then(rq2.join()).isEqualTo("Ok asyncReadFile");
then(rq3.join()).isEqualTo("Ok asyncReadFile");
then(rq4.join()).isEqualTo("Ok asyncReadFile");
System.out.println("End");
}

private void readFile(DataChannelRereader2 reader) {
then(reader.readString()).isEqualTo("test1234");
}

private CompletableFuture<String> asyncReadFile(DataChannelRereader2 reader) {
CompletableFuture<String> cf1 = CompletableFuture.supplyAsync(() -> {
IntStream
.rangeClosed(1, limit)
.forEach(i -> readFile(reader));
return "Ok asyncReadFile";
})
.handle((input, exception) -> {
if (exception != null) {
LOGGER.warn(exception.getLocalizedMessage(), exception);
return "Ko asyncReadFile";
}
return input;
});
return cf1;
}
}
78 changes: 78 additions & 0 deletions src/test/java/ev3dev/utils/DataChannelRereaderRaceTest.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,78 @@
package ev3dev.utils;

import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.concurrent.CompletableFuture;
import java.util.stream.IntStream;

import static org.assertj.core.api.BDDAssertions.then;

@Slf4j
public class DataChannelRereaderRaceTest {

final String fileName = "./race.txt";
final Integer limit = 10000;

@Before
@SneakyThrows
public void createFiles() throws IOException {
Files.writeString(Path.of(fileName), "test1234");
}

/**
* Reader1 <- race.txt
* Reader2 <- race.txt
* Reader3 <- race.txt
* Reader4 <- race.txt
*/
@Test
public void given_multiple_DataChannelRereader_when_execute_concurrently_then_Ok() {
DataChannelRereader reader = new DataChannelRereader(fileName);

CompletableFuture<String> rq1 = asyncReadFile(reader);
CompletableFuture<String> rq2 = asyncReadFile(reader);
CompletableFuture<String> rq3 = asyncReadFile(reader);
CompletableFuture<String> rq4 = asyncReadFile(reader);

CompletableFuture<Void> combinedFuture = CompletableFuture.allOf(rq1, rq2, rq3, rq4);
combinedFuture.join();

then(rq1.isDone()).isTrue();
then(rq2.isDone()).isTrue();
then(rq3.isDone()).isTrue();
then(rq4.isDone()).isTrue();

then(rq1.join()).isEqualTo("Ok asyncReadFile");
then(rq2.join()).isEqualTo("Ok asyncReadFile");
then(rq3.join()).isEqualTo("Ok asyncReadFile");
then(rq4.join()).isEqualTo("Ok asyncReadFile");
System.out.println("End");
}

private void readFile(DataChannelRereader reader) {
then(reader.readString()).isEqualTo("test1234");
}

private CompletableFuture<String> asyncReadFile(DataChannelRereader reader) {
CompletableFuture<String> cf1 = CompletableFuture.supplyAsync(() -> {
IntStream
.rangeClosed(1, limit)
.forEach(i -> readFile(reader));
return "Ok asyncReadFile";
})
.handle((input, exception) -> {
if (exception != null) {
LOGGER.warn(exception.getLocalizedMessage(), exception);
return "Ko asyncReadFile";
}
return input;
});
return cf1;
}
}