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Action programming library for testing

License: Apache License 2.0

Java 100.00%

functional java testing

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actionunit's Issues

Support hooking exceptions generated by retry action

Retry action would swallow all of the exceptions except for the one generated by the last execution. As a result, we would lose all of the intermediate error information. Moreover, if a long-running action is being executed repeatedly, we couldn't see any live information until the whole retry action finishes. Supporting exception hook could help us resolve the above two issues.

The mechanism to rethrow root cause exception automatically is confusing

The mechanism to rethrow root cause exception automatically is confusing since the stacktrace shows a different one from the one actually thrown.

This mechanism should be considered over engineering and abolished.

Introduce a "tests" action

A "tests" action is desired.

  Action action = tests(
     leaf("test1", c -> {}),
     leaf("test2", c -> {}),
     leaf("test3", c -> {}))

This action will perform its children one by one, however even if any of them fails it doesn't abort the rest.
Yet, the entire test action will fail after all of them are tried.
Only if all of them pass, the action will succeed.

Allow to give Supplier<Stream<T>> to ForEachOf action

It is awkward to force users to implement an Iterable that delays evaluations of element in a stream. Instead we should be able to write this

  $.forEachOf("summary text", () -> readListFromDatabase()).perform("print", System.out::println)

Make it possible to use 'default value' in action creatioin time for 'ForEach' action

I want to be able to do this.

  @PerformWith(Test.class)
  public Action composeSingleLoop2() {
    return sequential(
        simple("print hello", () -> System.out.println("hello")),
        forEachOf(
            asList("A", "B", "C")
        ).withDefault(
            "unknown"
        ).concurrently(
        ).perform(
            (Context $, DataHolder<String> value) -> {
              String v = value.isPresent() ?
                  value.get() :
                  String.format("(%s)", value.get());
              return $.sequential(
                  $.simple("print the given value(1st time)", () -> System.out.println(v)),
                  $.simple("print the given value(2nd time)", () -> System.out.println(v)),
                  $.sleep(2, MICROSECONDS)
              );
            }
        ),
        simple("print bye", () -> System.out.println("bye"))
    );
  }

ReportingActionPerformer may throw NullPointerException

ReportingActionPerformer may throw NullPointerException when a report for non-performed action is requested.

Support specific multiplicity for concurrent action

Concurrent action is using parallelStream to implement parallel executions of children actions. The default multiplicity of parallelStream is the number of cpu -1 according to this answer. On some occasions, we would like to control the multiplicity like ExecutorService especially for IO intensive actions.

Scopes of several methods in Commander are too narrow

Methods defined in Commander class are defined too narrow.
For instance, shell() method is defined packaged private, while it needs to be called to create a string representation of it.

Also it should implement a Cloneable interface to be able to be cloned when multiple actions should be created from it.

Attempt and forEachOf doesn't support external ActionFactory

The reusability of actions is one of the most important basis of actionunit. However, at least Attempt and forEachOf don't support external ActionFactory. As a result, we couldn't reuse current ActionFactory to create actions for them.

Action action = attempt(simple("attempt", () -> { throw new RuntimeException("attempt"); }))
    .recover(RuntimeException.class, ($, e) -> simple("recover", () -> System.out.println("recover")))
    .ensure(($) -> simple("ensure", () -> System.out.println("ensure")));

[x]Attempt
Exception in thread "main"   [x]Target
    [x]attempt
  [x]Recover(RuntimeException)
    []recover
  [x]Ensure
    []ensure
java.lang.IllegalStateException: Node matching '5(ensure)' was not found under '2(Ensure)'(3-ensure)
	at com.github.dakusui.actionunit.visitors.reporting.ReportingActionPerformer.lambda$toNode$3(ReportingActionPerformer.java:125)
	at java.util.Optional.orElseThrow(Optional.java:290)
	at com.github.dakusui.actionunit.visitors.reporting.ReportingActionPerformer.toNode(ReportingActionPerformer.java:123)
	at com.github.dakusui.actionunit.visitors.ActionWalker.handle(ActionWalker.java:178)
	at com.github.dakusui.actionunit.visitors.ActionWalker.visit(ActionWalker.java:27)
	at com.github.dakusui.actionunit.visitors.ActionPerformer.visit(ActionPerformer.java:20)
	at com.github.dakusui.actionunit.actions.Leaf.accept(Leaf.java:36)
	at com.github.dakusui.actionunit.visitors.ActionWalker.lambda$namedActionConsumer$0(ActionWalker.java:144)
	at com.github.dakusui.actionunit.visitors.ActionWalker.handle(ActionWalker.java:184)
	at com.github.dakusui.actionunit.visitors.ActionWalker.visit(ActionWalker.java:38)
	at com.github.dakusui.actionunit.visitors.ActionPerformer.visit(ActionPerformer.java:20)
	at com.github.dakusui.actionunit.actions.Named$Impl.accept(Named.java:63)
	at com.github.dakusui.actionunit.visitors.ActionPerformer.lambda$attemptActionConsumer$10(ActionPerformer.java:95)
	at com.github.dakusui.actionunit.visitors.ActionWalker.handle(ActionWalker.java:184)
	at com.github.dakusui.actionunit.visitors.ActionWalker.visit(ActionWalker.java:102)
	at com.github.dakusui.actionunit.visitors.ActionPerformer.visit(ActionPerformer.java:20)
	at com.github.dakusui.actionunit.actions.Attempt$Impl.accept(Attempt.java:94)
	at com.github.dakusui.actionunit.visitors.reporting.ReportingActionPerformer.perform(ReportingActionPerformer.java:70)
	at com.github.dakusui.actionunit.visitors.reporting.ReportingActionPerformer.performAndReport(ReportingActionPerformer.java:63)
	at com.github.xjj59307.Foo.main(Foo.java:78)

Make it possible to change output destination of ActionReporter.

(t.b.d.)

Remove unnecessary dependency on mockito-core in production code

Enable to override variables

Current Context does not allow to override variables following code. Overridable variable is more useful for user.

Context.java

    public Context assignTo(String variableName, Object value) {
      if (this.variables.containsKey(requireNonNull(variableName)))
        throw new RuntimeException();
      this.variables.put(variableName, value);
      return this;
    }

Make it possible to run a command without explicitly creating an action

Support JUnit5

Update documentation

This is a placeholder ticket for document improvements.

Make it possible to handle Non-java.lang.Exception Throwables.

Right now, actionunit is not able to handle throwables such as java.lang.Error and this is unnecessary restriction.

Rename method $ of When to keep interface consistency

The current builder class of When has a method called $ which equals to method build of Attempt and Retry. We should use the name build also for When to keep the consistency of interface.

Remove unnecessary files

Make it possible to define a scope by users

Not relying on actionunit framework to create a child context implicitly, maybe we should let users define a scope by themselves.

  public static Action scope(List<String> localVariables, Action action) {

  }

Retry prints x as many as retry times

Action action = ActionSupport.retry(ActionSupport.simple("attempt", () -> { throw new RuntimeException("attempt"); }))
    .withIntervalOf(100, TimeUnit.MILLISECONDS)
    .times(50)
    .on(RuntimeException.class)
    .build();

[x]Retry(100[milliseconds]x50times)
  [xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx]attempt

As we can see, retry has printed out 50 times x which is a little noisy if the retry times is a large number.

Make it possible to use variables within actions

I want to be able to do following.

  public void example() {
    Context top = new Context.Impl();

    run(
        top.sequential(
            top.simple("init", () -> top.set("i", 0)),
            top.forEachOf(asList("a", "b", "c", "d", "e", "f"))
                .perform(
                    ($, data) ->
                        $.sequential(
                            $.simple(
                                "print i",
                                () -> System.out.printf("%d %s%n", top.<Integer>get("i"), data.get())
                            ),
                            $.simple(
                                "i++",
                                () -> top.set("i", top.<Integer>get("i") + 1)
                            ))))
    );
  }

  private void run(Action action) {
    ReportingActionPerformer performer = ReportingActionPerformer.create(action);
    performer.report();
    performer.performAndReport();
  }
```
, which results in the output below.

```
[]Sequential (2 actions)
  []init
  []ForEach (SEQUENTIALLY) [a, b, c, d, e, f]
    []Sequential (2 actions)
      []print i
      []i++
0 a
1 b
2 c
3 d
4 e
5 f
[o]Sequential (2 actions)
  [o]init
  [o]ForEach (SEQUENTIALLY) [a, b, c, d, e, f]
    [o...]Sequential (2 actions)
      [o...]print i
      [o...]i++
```

Support fast-fail for concurrent action

The whole concurrent action won't finish until all its children actions finish even one of them may have already failed. This isn't expected when we would like to see a fast-fail on the action. We should support both behavior for concurrent action.

Action action = ActionSupport.concurrent(
  ActionSupport.simple("", () -> { throw new RuntimeException(); }),
  ActionSupport.sleep(10, TimeUnit.SECONDS)
);

action fails after 10 seconds.

Create a feature to use CLI programs as actions

I want to be able to do something like this.

  Function<Context, Action> createFiles() {
    return (Context $) -> $.named(
        "prepare test file",
        $.sequential(
            new Touch($).cwd(dir).add("a").build(),
            new Touch($).cwd(dir).add("b").build(),
            new Touch($).cwd(dir).add("c").build()
        ));
  }

Think of simplifying the interface of whilst and when actions

The current interface of whilst and when actions provided by ActionSupport is as follows.

whilst(Supplier<T> value, Predicate<T> condition);

when(Supplier<T> value, Predicate<T> condition);

I would say under most simple scenarios, we wouldn't separate the logic of Supplier<T> value and Predicate<T> condition. As a result, we have to put a placeholder like whilst(condition, (input) -> input). We could provide another interface like whilst(Supplier<Boolean> value).

Support "while" action

Fix flaky tests

This is a place holder ticket to fix flaky tests.

Value updated in recover clause is not respected in ensure clause

Value updated in recover clause is not respected in ensure clause, probably.

Clean up code

This is a place holder ticket for code clean up.

Expose report of ReportingActionPerformer

(t.b.d.)

Support jumphost option in SshOption

In the SshOptions class, it would be useful to be able to add jumphost proxies (more info on ProxyJump).

By supporting this, it would be simpler to support connecting to remote servers that require jumping through a jumpbox or firewall.

Improve tree formatting

Improve tree formatting on "ForEach" or "When/Otherwise" structure.

If we do something like following,

    Integer          boundary = 100;
    ContextPredicate cp       = ContextPredicate.of("j",
        predicate((Integer x) -> Objects.equals(x, 0)).describe("{0}==0")
            .or(predicate((Integer x) -> x > 0).describe("{0}>0"))
            .and(predicate((Integer x) -> x < boundary).describe(() -> "{0}<" + boundary)
            )).negate();

    ContextConsumer cc = contextConsumerFor("i").with(
        consumer(System.out::println).describe("System.out::println")
    ).andThen(contextConsumerFor("j").with(
        consumer(System.err::println).describe("System.err::println")
    ));

    @Test
    public void whenPerformedNestedLoop$thenWorksCorrectly() {
      ReportingActionPerformer.create(Writer.Std.OUT).performAndReport(
          forEach("i", c -> Stream.of("Hello", "world"))
              .perform(
                  forEach("j", c -> Stream.of(-1, 0, 1, 2, 100)).perform(
                      when(cp)
                          .perform(leaf(cc))
                          .otherwise(nop())
                  )));
    }

We'd get output like this.

Hello
-1
Hello
100
world
-1
world
100
[o]for each of data sequentially
  [oo]for each of data sequentially
    [o...]if [!j:[((j==0||j>0)&&j<100)]] is satisfied
      [o...]then
        [o...]i:[System.out::println];j:[System.err::println]
      [o...]else
        [o...](nop)

Simplify action tree reported by ReportingActionPerformer

I would see the following output:

[E:0]for each of (noname) parallely
  [EE:0]do sequentially
  +-[EE:0]print1
  |   [EE:0](noname)
  +-[]print2
  |   [](noname)
  +-[]do sequentially
    +-[]print2-1
    |   [](noname)
    +-[]print2-2
        [](noname)

for a Java program:

public class Example extends TestUtils.TestBase {
  @Ignore
  @Test
  public void test() {
    Action action = forEach(
        "i",
        (c) -> Stream.of("hello", "world")
    ).parallelly(
    ).perform(
        sequential(
            simple("print1", (c) -> System.out.println(v(c))),
            simple("print2", (c) -> System.out.println(v(c))),
            sequential(
                simple("print2-1", (c) -> System.out.println(v(c))),
                simple("print2-2", (c) -> System.out.println(v(c)))
            )
        )
    );

    ReportingActionPerformer.create().performAndReport(action, Writer.Std.OUT);
  }

  static private String v(Context c) {
    return c.valueOf("v");
  }
}

Allow "clone" for actions

We need to allow "clone" operation on an action, otherwise our users need to create a logic to do so everytime when they want to reuse existing action twice in the same action tree.

Reusing an action is possible without allowing this operation, though.
However, the reused action will appear in reports with incorrect information.

Warnings are given on release:prepare

Following warnings are given when mvn release:{prepare,perform} is executed.

[INFO] Executing goals 'deploy'...
[WARNING] Maven will be executed in interactive mode, but no input stream has been configured for this MavenInvoker instance.
[INFO] [INFO] Scanning for projects...
[INFO] [WARNING] 
[INFO] [WARNING] Some problems were encountered while building the effective model for com.github.dakusui:actionunit:jar:5.1.4
[INFO] [WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-source-plugin is missing.
[INFO] [WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-javadoc-plugin is missing.
[INFO] [WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-deploy-plugin is missing.
[INFO] [WARNING] 
[INFO] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[INFO] [WARNING] 
[INFO] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[INFO] [WARNING] 
[INFO] [INFO] 
[INFO] [INFO] ------------------------------------------------------------------------
[INFO] [INFO] Building actionunit 5.1.4
[INFO] [INFO] ------------------------------------------------------------------------
[INFO] [INFO] 
[INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ actionunit ---
[INFO] [INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] [INFO] skip non existing resourceDirectory /home/hiroshi/workspace/actionunit/target/checkout/src/main/resources
[INFO] [INFO] 
[INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ actionunit ---
[INFO] [INFO] Changes detected - recompiling the module!
[INFO] [INFO] Compiling 36 source files to /home/hiroshi/workspace/actionunit/target/checkout/target/classes
[INFO] [INFO] 
[INFO] [INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ actionunit ---
[INFO] [INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] [INFO] skip non existing resourceDirectory /home/hiroshi/workspace/actionunit/target/checkout/src/test/resources
[INFO] [INFO] 
[INFO] [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ actionunit ---
[INFO] [INFO] Changes detected - recompiling the module!
[INFO] [INFO] Compiling 37 source files to /home/hiroshi/workspace/actionunit/target/checkout/target/test-classes
[INFO] [WARNING] /home/hiroshi/workspace/actionunit/target/checkout/src/test/java/com/github/dakusui/actionunit/extras/cmd/CmdExample.java: /home/hiroshi/workspace/actionunit/target/checkout/src/test/java/com/github/dakusui/actionunit/extras/cmd/CmdExample.java uses unchecked or unsafe operations.
[INFO] [WARNING] /home/hiroshi/workspace/actionunit/target/checkout/src/test/java/com/github/dakusui/actionunit/extras/cmd/CmdExample.java: Recompile with -Xlint:unchecked for details.
[INFO] [INFO] 
[INFO] [INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ actionunit ---
[INFO] [INFO] Surefire report directory: /home/hiroshi/workspace/actionunit/target/checkout/target/surefire-reports
[INFO]

Use OpenJDK instead of Orack JDK8

Modernize build tools

Modernize build tools like pcond.

Not possible to override ```composeCmd``` method

Not possible to override Commander#composeCmd method.

Introduce type aware context variable mechanism

ForEachTest#givenConcurrentForEachAction$whenPerformWithReporting$worksCorrectly fails intermittently

It fails about once out of 10 times with spitting following output.


<!>
<Hello>
<world>
[o]ForEach
  [ooo]Sequential (2 actions)
    [ooo]print {s}

java.lang.NullPointerException
	at java.util.LinkedList$ListItr.next(LinkedList.java:893)
	at java.lang.Iterable.forEach(Iterable.java:74)
	at com.github.dakusui.actionunit.visitors.reporting.Report$Record$Formatter$1.formatRecord(Report.java:65)
	at com.github.dakusui.actionunit.visitors.reporting.Report$Record$Formatter$1.format(Report.java:58)
	at com.github.dakusui.actionunit.visitors.reporting.ReportingActionPerformer.lambda$perform$34(ReportingActionPerformer.java:59)
	at com.github.dakusui.actionunit.visitors.reporting.Node.walk(Node.java:35)
	at com.github.dakusui.actionunit.visitors.reporting.Node.lambda$walk$32(Node.java:39)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080)
	at com.github.dakusui.actionunit.visitors.reporting.Node.walk(Node.java:39)
	at com.github.dakusui.actionunit.visitors.reporting.Node.lambda$walk$32(Node.java:39)
	at java.lang.Iterable.forEach(Iterable.java:75)
	at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080)
	at com.github.dakusui.actionunit.visitors.reporting.Node.walk(Node.java:39)
	at com.github.dakusui.actionunit.visitors.reporting.Node.walk(Node.java:31)
	at com.github.dakusui.actionunit.visitors.reporting.ReportingActionPerformer.perform(ReportingActionPerformer.java:56)
	at com.github.dakusui.actionunit.ut.actions.ForEachTest.givenConcurrentForEachAction$whenPerformWithReporting$worksCorrectly(ForEachTest.java:74)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:58)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

Support network commands

It would be useful to support "network" commands such as scp, curl, and git.

No descriptive error message from ActionSupport.TimeOut

This action throws ActionTimeOutExecption when timeout happens. Then, the message is null. This should allow descriptive error messages.

The sample class to reproduce this symptom.


public class ActionTimeoutTest {
	public static void main(String[] args) {
		List<String> alphabets = new ArrayList<String>() {{
			this.add("a");
			this.add("b");
		}};

		Action action = parallel(alphabets.stream()
				.map(alphabet -> leaf(c -> {
					if(alphabet.equals("b")) {
						try {
							Thread.sleep(2000);
						} catch (InterruptedException e) {
						}
					}
				}))
				.map(a -> timeout(a).in(1, SECONDS))
				.map(a -> retry(a)
						.on(ActionException.class)
						.withIntervalOf(1, SECONDS)
						.times(2)
						.$())
				.collect(toList()));

		try {
			ActionUtils.processAction(action, Writer.Slf4J.INFO);
		}catch (ActionTimeOutException e) {
			System.out.println(e.getMessage());
		}
	}
}

Not possible to use a context consumer in "recover" clause

Print time spent for each action

Print time spent for each action in the report generated by ReportingActionPerformer.

Improve report produced by ReportingActionPerformer

Improve report produced by ReportingActionPerformer so that important actions are written with higher log level.
An action marked E/F should be considered more important than passing ones.
Passing ones belonging to a sequential/parallel action one of whose children is failing should be considered more important. (Siblings of a failing action)

Logs for command executions are a bit too verbose

In case environment variables are empty it should not be printed in the same level as the command line itself.

Clean up commander mechanism

Clean up commander mechanism.
Also, it's better to write a guideline of its usage.

Move to cmd-2.0.x

Using ContextConsumer.Impl inside recover clause sometimes results in poor performance

Condition that triggers this issue is not clear yet, though, it might be relating to using the class inside recover inside recover structure.

This made my test, which takes only 10ms with a lambda, 10 seconds long.

Printability improvement

String.format("%s", action)

results in Object#toString which is not readable enough.
Probably implementing toString method in objects returned by methods in ActionSupport will be useful.

A test where given cmd action fails twice and passes, whenRetryOnce$thenFail(RetryOnTimeOutTest) is not passing in Travis CI

Following is output.

whenRetryOnce$thenFail(com.github.dakusui.actionunit.extras.cmd.RetryOnTimeOutTest)  Time elapsed: 4.014 sec  <<< ERROR!
fail
fail
success
[o]do sequentially
  [o](nop)
  [o]attempt
    [o]retry 3 times in 1[seconds] on ActionException
      [EEo]timeout in 1[seconds]
        [EEo](commander)
          [EEo](noname)
    []recover
      []rethrow
        [](noname)
    [o]ensure
      [o](commander)
        [o](noname)
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 8.049 sec <<< FAILURE!
java.lang.Exception: Unexpected exception, expected<com.github.dakusui.actionunit.exceptions.ActionException> but was<org.junit.ComparisonFailure>

This gives following assertion message and it implies 'cmd' might not be consuming stdout as designed.

Caused by: org.junit.ComparisonFailure: expected:<[and:[
  @size[]->castTo[Integer](x) equalTo[2]
  @get[0](x) equalTo[fail]
  @get[1](x) equalTo[fail]
]]> but was:<[when x=<[fail]>; then and:[
  @size[]->castTo[Integer](x) equalTo[2] was not met because @size[]->castTo[Integer](x)=<1>
  @get[0](x) equalTo[fail]
  @get[1](x) equalTo[fail] failed with java.lang.RuntimeException(java.lang.reflect.InvocationTargetException)
]->false

Even if this is a real bug it should be fixed in 'cmd' side.

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