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How to use TemporaryFolder class of org.junit.rules package

Best junit code snippet using org.junit.rules.TemporaryFolder

Source:JunitRuleTest.java

...6import org.junit.Test;7import org.junit.rules.ExpectedException;8import org.junit.rules.MethodRule;9import org.junit.rules.RuleChain;10import org.junit.rules.TemporaryFolder;11import org.junit.rules.TestName;12import org.junit.rules.TestRule;13import org.junit.rules.Timeout;14import org.junit.runner.Description;15import org.junit.runner.RunWith;16import org.junit.runners.model.FrameworkMethod;17import org.junit.runners.model.Statement;18import org.springframework.boot.test.context.SpringBootTest;19import org.springframework.test.context.junit4.SpringRunner;20import java.io.File;21import java.util.concurrent.TimeUnit;22/**23 * JunitRuleTest24 *25 * @author dongdaiming(è£ä»£æ)26 * @date 2019-07-2227 * @see <a href="https://blog.csdn.net/kingmax54212008/article/details/89003076">Junit Ruleçä½¿ç¨</a>28 */29@Slf4j30@RunWith(SpringRunner.class)31@SpringBootTest32public class JunitRuleTest {33    // TemporaryFolderå¯ç¨äºå¨æµè¯æ¶çææä»¶å¹¶å¨æµè¯å®åèªå¨å é¤34    @Rule35    public TemporaryFolder temporaryFolder = new TemporaryFolder(new File("/temp/junit"));36    // TestNameå¯ä»¥è·åå°å½åæµè¯æ¹æ³çåç§°37    @Rule38    public TestName testName = new TestName();39    // Timeoutå¯ä»¥è®¾ç½®å¨å±çè¶æ¶æ¶é´40    @Rule41    public Timeout timeout = Timeout.seconds(15);42    // èªå®ä¹æ¹æ³è§å-æå°æµè¯æ¹æ³åä¸èæ¶43    @Rule44    public MethodLoggingRule methodLogger = new MethodLoggingRule();45    // ExpectedExceptionå¯ä»¥å¹éå¼å¸¸ç±»ååå¼å¸¸message46    @Rule47    public ExpectedException expectedException = ExpectedException.none();48    @Rule49    public RuleChain ruleChain = RuleChain.outerRule(new LoggingRule(3)).around(new LoggingRule(2)).around(new LoggingRule(1));50    @Test51    public void testTemporaryFolder() throws Exception {52        File file = temporaryFolder.newFile();53        log.info("file: {}", file.getAbsolutePath());54        FileUtils.writeStringToFile(file, "abc", "utf-8", true);55        log.info("read data: {}", FileUtils.readFileToString(file, "utf-8"));56        TimeUnit.SECONDS.sleep(10);57    }58    @Test59    public void testTimeout() throws InterruptedException {60        TimeUnit.SECONDS.sleep(20);61    }62    @Test63    public void testNotTimeout() throws InterruptedException {64        TimeUnit.SECONDS.sleep(1);65    }...

Source:Rule.java

...27 * each test method, and deletes it after each:28 * <pre>29 * public static class HasTempFolder {30 *     &#064;Rule31 *     public TemporaryFolder folder= new TemporaryFolder();32 *33 *     &#064;Test34 *     public void testUsingTempFolder() throws IOException {35 *         File createdFile= folder.newFile(&quot;myfile.txt&quot;);36 *         File createdFolder= folder.newFolder(&quot;subfolder&quot;);37 *         // ...38 *     }39 * }40 * </pre>41 * <p>42 * And the same using a method.43 * <pre>44 * public static class HasTempFolder {45 *     private TemporaryFolder folder= new TemporaryFolder();46 *47 *     &#064;Rule48 *     public TemporaryFolder getFolder() {49 *         return folder;50 *     }51 *52 *     &#064;Test53 *     public void testUsingTempFolder() throws IOException {54 *         File createdFile= folder.newFile(&quot;myfile.txt&quot;);55 *         File createdFolder= folder.newFolder(&quot;subfolder&quot;);56 *         // ...57 *     }58 * }59 * </pre>60 * <p>61 * For more information and more examples, see62 * {@link org.junit.rules.TestRule}....

Source:RulesTest.java

2import org.junit.Rule;3import org.junit.Test;4import org.junit.rules.ErrorCollector;5import org.junit.rules.ExpectedException;6import org.junit.rules.TemporaryFolder;7import org.junit.rules.TestName;8import org.junit.rules.TestRule;9import org.junit.rules.TestWatcher;10import org.junit.rules.Timeout;11import org.junit.runner.JUnitCore;12import org.junit.runner.Result;13import org.junit.runner.RunWith;14import static org.assertj.core.api.Assertions.*;15@RunWith(JUnitParamsRunner.class)16public class RulesTest {17    @Rule18    public TemporaryFolder folder = new TemporaryFolder();19    @Rule20    public ExpectedException exception = ExpectedException.none();21    @Rule22    public ErrorCollector errors = new ErrorCollector();23    @Rule24    public TestName testName = new TestName();25    @Rule26    public TestWatcher testWatcher = new TestWatcher() {27    };28    @Rule29    public Timeout timeout = new Timeout(0);30    @Test31    @Parameters("")32    public void shouldHandleRulesProperly(String n) {...

Source:TemporaryFolder.java

1public class org.junit.rules.TemporaryFolder extends org.junit.rules.ExternalResource {2  public org.junit.rules.TemporaryFolder();3  public org.junit.rules.TemporaryFolder(java.io.File);4  protected org.junit.rules.TemporaryFolder(org.junit.rules.TemporaryFolder$Builder);5  public static org.junit.rules.TemporaryFolder$Builder builder();6  protected void before() throws java.lang.Throwable;7  protected void after();8  public void create() throws java.io.IOException;9  public java.io.File newFile(java.lang.String) throws java.io.IOException;10  public java.io.File newFile() throws java.io.IOException;11  public java.io.File newFolder(java.lang.String) throws java.io.IOException;12  public java.io.File newFolder(java.lang.String...) throws java.io.IOException;13  public java.io.File newFolder() throws java.io.IOException;14  public java.io.File getRoot();15  public void delete();16}...

Source:UnusedTestRuleCheck.java

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import org.junit.rules.TestName;5import org.junit.rules.Timeout;6import org.sonar.java.checks.verifier.JavaCheckVerifier;7class ProjectDefinitionTest {8  @Rule9  public TestName testNameUnused = new TestName(); // Noncompliant [[sc=19;ec=33]] {{Remove this unused "TestName".}}10  public TestName testNameObj = new TestName();11  @Rule12  public Timeout globalTimeout = Timeout.millis(20);13  @Rule14  public TestName testNameUsed = new TestName();15  @Rule16  public TemporaryFolder tempFolderUnused = new TemporaryFolder();  // Noncompliant {{Remove this unused "TemporaryFolder".}}17  @Rule18  public TemporaryFolder tempFolderUsed = new TemporaryFolder();19  @Test20  public void testIt() throws IOException {21    tempFolderUsed.newFile();22    testNameUsed.getMethodName();23  }24}...

Source:TemporaryFolder$Builder.java

1public class org.junit.rules.TemporaryFolder$Builder {2  protected org.junit.rules.TemporaryFolder$Builder();3  public org.junit.rules.TemporaryFolder$Builder parentFolder(java.io.File);4  public org.junit.rules.TemporaryFolder$Builder assureDeletion();5  public org.junit.rules.TemporaryFolder build();6  static java.io.File access$000(org.junit.rules.TemporaryFolder$Builder);7  static boolean access$100(org.junit.rules.TemporaryFolder$Builder);8}...

TemporaryFolder

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import java.io.File;5import java.io.IOException;6public class TemporaryFolderTest {7    public TemporaryFolder folder = new TemporaryFolder();8    public void testUsingTempFolder() throws IOException {9        File createdFolder = folder.newFolder("newfolder");10        System.out.println("Temporary folder is " + folder.getRoot());11    }12}13import java.io.File;14import java.io.IOException;15import org.junit.Rule;16import org.junit.Test;17import org.junit.rules.TemporaryFolder;18public class TemporaryFileTest {19    public TemporaryFolder folder = new TemporaryFolder();20    public void testUsingTempFile() throws IOException {21        File createdFile = folder.newFile("newfile.txt");22        System.out.println("Temporary file is " + folder.getRoot());23    }24}25import java.io.File;26import java.io.IOException;27import org.junit.Rule;28import org.junit.Test;29import org.junit.rules.TemporaryFolder;30public class TemporaryFolderAndFileTest {31    public TemporaryFolder folder = new TemporaryFolder();32    public void testUsingTempFolderAndFile() throws IOException {33        File createdFolder = folder.newFolder("newfolder");34        File createdFile = folder.newFile("newfile.txt");35        System.out.println("Temporary folder is " + folder.getRoot());36    }37}38import java.io.File;39import java.io.IOException;40import org.junit.After;41import org.junit.Before;42import org.junit.Rule;43import org.junit.Test;44import org.junit.rules.TemporaryFolder;45public class TemporaryFolderAndFileTest {46    public TemporaryFolder folder = new TemporaryFolder();47    public void before() {

TemporaryFolder

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import java.io.File;5import java.io.IOException;6public class TemporaryFolderTest {7    public TemporaryFolder folder = new TemporaryFolder();8    public void testUsingTempFolder() throws IOException {9        File createdFile = folder.newFile("myfile.txt");10        File createdFolder = folder.newFolder("subfolder");11        System.out.println("File path: " + createdFile.getAbsolutePath());12        System.out.println("Folder path: " + createdFolder.getAbsolutePath());13    }14}15public static TemporaryFolder folder = new TemporaryFolder();16delete()17deleteOnExit()18If we want to create a temporary file or folder in a specific location, then we can pass the location as the argument to the newFile() or newFolder() method. The following example shows how to create a temporary file in a specific location:19public void testUsingTempFolder() throws IOException {

TemporaryFolder

Using AI Code Generation

1import java.io.File;2import java.io.IOException;3import java.nio.file.Files;4import java.nio.file.Path;5import java.nio.file.Paths;6import org.junit.Rule;7import org.junit.Test;8import org.junit.rules.TemporaryFolder;9public class TemporaryFolderTest {10    public TemporaryFolder folder = new TemporaryFolder();11    public void testUsingTempFolder() throws IOException {12        File createdFile = folder.newFile("myfile.txt");13        File createdFolder = folder.newFolder("subfolder");14        folder.delete();15    }16    public void testUsingTempFolderWithCustomRootFolder() throws IOException {17        TemporaryFolder customFolder = new TemporaryFolder(new File("/tmp"));18        customFolder.create();19        File createdFile = customFolder.newFile("myfile.txt");20        File createdFolder = customFolder.newFolder("subfolder");21        customFolder.delete();22    }23    public void testUsingTempFolderWithCustomRootFolderAndPrefix() throws IOException {24        TemporaryFolder customFolder = new TemporaryFolder(new File("/tmp"));25        customFolder.create();26        File createdFile = customFolder.newFile("myfile.txt");27        File createdFolder = customFolder.newFolder("subfolder");28        customFolder.delete();29    }30    public void testUsingTempFolderWithCustomRootFolderAndPrefixAndSuffix() throws IOException {31        TemporaryFolder customFolder = new TemporaryFolder(new File("/tmp"));32        customFolder.create();33        File createdFile = customFolder.newFile("myfile.txt");34        File createdFolder = customFolder.newFolder("subfolder");35        customFolder.delete();36    }37    public void testUsingTempFolderWithCustomRootFolderAndPrefixAndSuffixAndRandom() throws IOException {38        TemporaryFolder customFolder = new TemporaryFolder(new File("/tmp"));39        customFolder.create();40        File createdFile = customFolder.newFile("myfile.txt");41        File createdFolder = customFolder.newFolder("subfolder");42        customFolder.delete();43    }

TemporaryFolder

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import java.io.File;5import java.io.IOException;6public class TemporaryFolderExample {7    public TemporaryFolder folder = new TemporaryFolder();8    public void testUsingTempFolder() throws IOException {9        File createdFile = folder.newFile("myfile.txt");10        File createdFolder = folder.newFolder("subfolder");11    }12}13newFolder(String folderName, String

TemporaryFolder

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import java.io.File;5import java.io.IOException;6public class TemporaryFolderExample {7    public TemporaryFolder tempFolder = new TemporaryFolder();8    public void testUsingTempFolder() throws IOException {9        File createdFile = tempFolder.newFile("myfile.txt");10        File createdFolder = tempFolder.newFolder("subfolder");11    }12}13import org.junit.Rule;14import org.junit.Test;15import org.junit.rules.TemporaryFolder;16import java.io.File;17import java.io.IOException;18public class TemporaryFolderExample {19    public TemporaryFolder tempFolder = new TemporaryFolder();20    public void testUsingTempFolder() throws IOException {21        File createdFile = tempFolder.newFile("myfile.txt");22        File createdFolder = tempFolder.newFolder("subfolder");23    }24}

TemporaryFolder

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import java.io.File;5import java.io.IOException;6import static org.junit.Assert.assertTrue;7public class TestJunit4 {8    public TemporaryFolder folder = new TemporaryFolder();9    public void testUsingTempFolder() throws IOException {10        File createdFile = folder.newFile("myfile.txt");11        assertTrue(createdFile.isFile());12    }13}

TemporaryFolder

Using AI Code Generation

1import org.junit.rules.TemporaryFolder;2import java.io.File;3import java.io.IOException;4public class UsingTemporaryFolder {5    public TemporaryFolder folder = new TemporaryFolder();6    public void testUsingTempFolder() throws IOException {7        File createdFolder = folder.newFolder("newfolder");8        File createdFile = folder.newFile("myfilefile.txt");9        assertTrue(createdFolder.exists());10        assertTrue(createdFile.exists());11    }12}

TemporaryFolder

Using AI Code Generation

1import org.junit.rules.TemporaryFolder;2import java.io.File;3import java.io.IOException;4public class UsingTemporaryFolder {5    public TemporaryFolder folder = new TemporaryFolder();6    public void testUsingTempFolder() throws IOException {7        File createdFolder = folder.newFolder("newfolder");8        File createdFile = folder.newFile("myfilefile.txt");9        assertTrue(createdFolder.exists());10        assertTrue(createdFile.exists());11    }12}

TemporaryFolder

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import java.io.File;5import java.io.IOException;6public class TemporaryFolderExample {7    public TemporaryFolder folder = new TemporaryFolder();8    public void testUsingTempFolder() throws IOException {9        File createdFile = folder.newFile("myfile.txt");10        File createdFolder = folder.newFolder("subfolder");11    }12}13newFolder(String folderName, String

TemporaryFolder

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.TemporaryFolder;4import java.io.File;5import java.io.IOException;6public class TemporaryFolderExample {7    public TemporaryFolder tempFolder = new TemporaryFolder();8    public void testUsingTempFolder() throws IOException {9        File createdFile = tempFolder.newFile("myfile.txt");10        File createdFolder = tempFolder.newFolder("subfolder");11    }12}13import org.junit.Rule;14import org.junit.Test;15import org.junit.rules.TemporaryFolder;16import java.io.File;17import java.io.IOException;18public class TemporaryFolderExample {19    public TemporaryFolder tempFolder = new TemporaryFolder();20    public void testUsingTempFolder() throws IOException {21        File createdFile = tempFolder.newFile("myfile.txt");22        File createdFolder = tempFolder.newFolder("subfolder");23    }24}

Source: How to create a temporary directory/folder in Java?

1for (int i = 0; i < array.Length; ++i)2{3 // Use array[i]4}5

Source: What is the correct way to write to temp file during unit tests with Maven?

1if (data[c] >= 128)2 sum += data[c];3

Source: How does Junit @Rule work?

1// Test2clock_t start = clock();3long long a[] = {0, 0};4long long sum;56for (unsigned i = 0; i < 100000; ++i)7{8    // Primary loop9    for (unsigned c = 0; c < arraySize; ++c)10    {11        int j = (data[c] >> 7);12        a[j] += data[c];13    }14}1516double elapsedTime = static_cast<double>(clock() - start) / CLOCKS_PER_SEC;17sum = a[1];18

Source:How does Junit @Rule work?

// Test
clock_t start = clock();
long long a[] = {0, 0};
long long sum;

for (unsigned i = 0; i < 100000; ++i)
{
    // Primary loop
    for (unsigned c = 0; c < arraySize; ++c)
    {
        int j = (data[c] >> 7);
        a[j] += data[c];
    }
}

double elapsedTime = static_cast<double>(clock() - start) / CLOCKS_PER_SEC;
sum = a[1];

JUnit Tutorial:

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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.