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How to use Interface Filterable class of org.junit.runner.manipulation package

Best junit code snippet using org.junit.runner.manipulation.Interface Filterable

Source:JUnit4TestAdapter.java

1package junit.framework;2import java.util.List;3import org.junit.Ignore;4import org.junit.runner.Describable;5import org.junit.runner.Description;6import org.junit.runner.Request;7import org.junit.runner.Runner;8import org.junit.runner.manipulation.Filter;9import org.junit.runner.manipulation.Filterable;10import org.junit.runner.manipulation.NoTestsRemainException;11import org.junit.runner.manipulation.Sortable;12import org.junit.runner.manipulation.Sorter;13public class JUnit4TestAdapter implements Test, Filterable, Sortable, Describable {14    private final Class<?> fNewTestClass;15    private final Runner fRunner;16    private final JUnit4TestAdapterCache fCache;17    public JUnit4TestAdapter(Class<?> newTestClass) {18        this(newTestClass, JUnit4TestAdapterCache.getDefault());19    }20    public JUnit4TestAdapter(final Class<?> newTestClass, JUnit4TestAdapterCache cache) {21        fCache = cache;22        fNewTestClass = newTestClass;23        fRunner = Request.classWithoutSuiteMethod(newTestClass).getRunner();24    }25    public int countTestCases() {26        return fRunner.testCount();27    }28    public void run(TestResult result) {29        fRunner.run(fCache.getNotifier(result, this));30    }31    // reflective interface for Eclipse32    public List<Test> getTests() {33        return fCache.asTestList(getDescription());34    }35    // reflective interface for Eclipse36    public Class<?> getTestClass() {37        return fNewTestClass;38    }39    public Description getDescription() {40        Description description = fRunner.getDescription();41        return removeIgnored(description);42    }43    private Description removeIgnored(Description description) {44        if (isIgnored(description)) {45            return Description.EMPTY;46        }47        Description result = description.childlessCopy();48        for (Description each : description.getChildren()) {49            Description child = removeIgnored(each);50            if (!child.isEmpty()) {51                result.addChild(child);52            }53        }54        return result;55    }56    private boolean isIgnored(Description description) {57        return description.getAnnotation(Ignore.class) != null;58    }59    @Override60    public String toString() {61        return fNewTestClass.getName();62    }63    public void filter(Filter filter) throws NoTestsRemainException {64        filter.apply(fRunner);65    }66    public void sort(Sorter sorter) {67        sorter.apply(fRunner);68    }69}...

Source: Remove elements from collection while iterating

1InetAddress[] allAddresses = Inet4Address.getAllByName("YourComputerHostName");2        InetAddress desiredAddress;3        //In order to find the desired Ip to be routed by other modules (WiFi adapter)4        for (InetAddress address :5                allAddresses) {6            if (address.getHostAddress().startsWith("192.168.2")) {7                desiredAddress = address;8            }9        }10// Use the desired address for whatever purpose.11

Source:Remove elements from collection while iterating

InetAddress[] allAddresses = Inet4Address.getAllByName("YourComputerHostName");
        InetAddress desiredAddress;
        //In order to find the desired Ip to be routed by other modules (WiFi adapter)
        for (InetAddress address :
                allAddresses) {
            if (address.getHostAddress().startsWith("192.168.2")) {
                desiredAddress = address;
            }
        }
// Use the desired address for whatever purpose.

Source: Why are Java Streams once-off?

1private Stream<InetAddress> getNonLocalIpAddresses() throws IOException {2    return enumerationAsStream(NetworkInterface.getNetworkInterfaces())3        .flatMap(networkInterface -> enumerationAsStream(networkInterface.getInetAddresses()))4        .filter(inetAddress -> !inetAddress.isAnyLocalAddress())5        .filter(inetAddress -> !inetAddress.isSiteLocalAddress())6        .filter(inetAddress -> !inetAddress.isLoopbackAddress())7        .filter(inetAddress -> !inetAddress.isLinkLocalAddress());8}9

Source:Why are Java Streams once-off?

private Stream<InetAddress> getNonLocalIpAddresses() throws IOException {
    return enumerationAsStream(NetworkInterface.getNetworkInterfaces())
        .flatMap(networkInterface -> enumerationAsStream(networkInterface.getInetAddresses()))
        .filter(inetAddress -> !inetAddress.isAnyLocalAddress())
        .filter(inetAddress -> !inetAddress.isSiteLocalAddress())
        .filter(inetAddress -> !inetAddress.isLoopbackAddress())
        .filter(inetAddress -> !inetAddress.isLinkLocalAddress());
}

Source: In Java, what are the advantages of streams over loops?

1public class MvcConfig implements WebMvcConfigurer {2

JUnit Tutorial:

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JUnit Tutorial Chapters:

Here are the detailed JUnit testing chapters to help you get started:

Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
Top Java Unit testing frameworks - Here are the upcoming JUnit automation testing frameworks that you can use in 2023 to boost your unit testing.
What is the JUnit framework
Why is JUnit testing important - Learn the importance and numerous benefits of using the JUnit testing framework.
Features of JUnit - Learn about the numerous features of JUnit and why developers prefer it.
JUnit 5 vs. JUnit 4: Differences - Here is a complete comparison between JUnit 5 and JUnit 4 testing frameworks.
Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
Getting started with JUnit testing - After successfully setting up your JUnit environment, this chapter will help you get started with JUnit testing in no time.
Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.