for (int i = 0; i < array.Length; ++i)
{
// Use array[i]
}
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 Ruleç使ç¨</a>28 */29@Slf4j30@RunWith(SpringRunner.class)31@SpringBootTest32public class JunitRuleTest {33 // TemporaryFolderå¯ç¨äºå¨æµè¯æ¶çææ件并å¨æµè¯å®åèªå¨å é¤34 @Rule35 public TemporaryFolder temporaryFolder = new TemporaryFolder(new File("/temp/junit"));36 // TestNameå¯ä»¥è·åå°å½åæµè¯æ¹æ³çå称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»¥å¹é
å¼å¸¸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 * @Rule31 * public TemporaryFolder folder= new TemporaryFolder();32 *33 * @Test34 * public void testUsingTempFolder() throws IOException {35 * File createdFile= folder.newFile("myfile.txt");36 * File createdFolder= folder.newFolder("subfolder");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 * @Rule48 * public TemporaryFolder getFolder() {49 * return folder;50 * }51 *52 * @Test53 * public void testUsingTempFolder() throws IOException {54 * File createdFile= folder.newFile("myfile.txt");55 * File createdFolder= folder.newFolder("subfolder");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}
1for (int i = 0; i < array.Length; ++i)2{3 // Use array[i]4}5
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
JUnit 4 Expected Exception type
java: how to mock Calendar.getInstance()?
Changing names of parameterized tests
Mocking a class vs. mocking its interface
jUnit ignore @Test methods from base class
Important frameworks/tools to learn
Unit testing a Java Servlet
Meaning of delta or epsilon argument of assertEquals for double values
Different teardown for each @Test in jUnit
Best way to automagically migrate tests from JUnit 3 to JUnit 4?
There's actually an alternative to the @Test(expected=Xyz.class)
in JUnit 4.7 using Rule
and ExpectedException
In your test case you declare an ExpectedException
annotated with @Rule
, and assign it a default value of ExpectedException.none()
. Then in your test that expects an exception you replace the value with the actual expected value. The advantage of this is that without using the ugly try/catch method, you can further specify what the message within the exception was
@Rule public ExpectedException thrown= ExpectedException.none();
@Test
public void myTest() {
thrown.expect( Exception.class );
thrown.expectMessage("Init Gold must be >= 0");
rodgers = new Pirate("Dread Pirate Rodgers" , -100);
}
Using this method, you might be able to test for the message in the generic exception to be something specific.
ADDITION
Another advantage of using ExpectedException
is that you can more precisely scope the exception within the context of the test case. If you are only using @Test(expected=Xyz.class)
annotation on the test, then the Xyz exception can be thrown anywhere in the test code -- including any test setup or pre-asserts within the test method. This can lead to a false positive.
Using ExpectedException, you can defer specifying the thrown.expect(Xyz.class)
until after any setup and pre-asserts, just prior to actually invoking the method under test. Thus, you more accurately scope the exception to be thrown by the actual method invocation rather than any of the test fixture itself.
JUnit 5 NOTE:
JUnit 5 JUnit Jupiter has removed @Test(expected=...)
, @Rule
and ExpectedException
altogether. They are replaced with the new assertThrows()
, which requires the use of Java 8 and lambda syntax. ExpectedException
is still available for use in JUnit 5 through JUnit Vintage. Also JUnit Jupiter will also continue to support JUnit 4 ExpectedException
through use of the junit-jupiter-migrationsupport module, but only if you add an additional class-level annotation of @EnableRuleMigrationSupport
.
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