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How to use JUnitMatchers class of org.junit.matchers package

Best junit code snippet using org.junit.matchers.JUnitMatchers

Source:ListingControllerIntegrationTest.java

...113		mongoTemplate.save(listing, ListingServiceImpl.LISTING_COLLECTION_NAME);114		115		mockMvc.perform(get("/listing").param("id", listing.getId()))116		.andExpect(status().isOk())117		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"title\":\"title\"")))118		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"description\":\"description\"")))119		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"price\":35.0")))120		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"listingTime\":0")))121		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"expiryTime\":1")))122		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"categoryForiegnKey\":\"123\"")))123		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"sellerIdentityForiegnKey\":\"123")));124	}125	126	@Test127	public void testGetListings() throws Exception128	{129		Listing listing1 = new Listing("title1", "description1", 31.0d, "1231", "1", 0l, 1l);130		Listing listing2 = new Listing("title2", "description2", 32.0d, "1232", "1", 2l, 3l);131		mongoTemplate.save(listing1, ListingServiceImpl.LISTING_COLLECTION_NAME);132		mongoTemplate.save(listing2, ListingServiceImpl.LISTING_COLLECTION_NAME);133		134		mockMvc.perform(get("/listings").param("queryKey", "sellerIdentityForiegnKey")135				.param("queryValue", listing1.getSellerIdentityForiegnKey()))136		.andExpect(status().isOk())137		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"title\":\"title1\"")))138		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"description\":\"description1\"")))139		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"price\":31.0")))140		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"listingTime\":0")))141		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"expiryTime\":1")))142		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"categoryForiegnKey\":\"1231\"")))143		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"sellerIdentityForiegnKey\":\"1")))144		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"title\":\"title2\"")))145		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"description\":\"description2\"")))146		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"price\":32.0")))147		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"listingTime\":2")))148		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"expiryTime\":3")))149		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"categoryForiegnKey\":\"1232\"")))150		.andExpect(content().string(org.junit.matchers.JUnitMatchers.containsString("\"sellerIdentityForiegnKey\":\"1")));151	}152	153	@Test154	public void testDeleteListing() throws Exception155	{156		Listing listing = new Listing("title", "description", 35.0d, "123", "123", 0l, 1l);157		mongoTemplate.save(listing, ListingServiceImpl.LISTING_COLLECTION_NAME);158		159		mockMvc.perform(delete("/listing").param("id", listing.getId()))160		.andExpect(status().isOk());161		162		Assert.assertTrue("Expected to be null", mongoTemplate.findById(listing.getId(), Listing.class) == null);163	}164	
...

Source:AssertTests.java

...4import static org.hamcrest.CoreMatchers.equalTo;5import static org.hamcrest.CoreMatchers.not;6import static org.hamcrest.CoreMatchers.sameInstance;7import static org.hamcrest.CoreMatchers.startsWith;8import static org.junit.matchers.JUnitMatchers.both;9import static org.junit.matchers.JUnitMatchers.containsString;10import static org.junit.matchers.JUnitMatchers.everyItem;11import static org.junit.matchers.JUnitMatchers.hasItems;12import java.util.Arrays;13import org.hamcrest.core.CombinableMatcher;14import org.junit.FixMethodOrder;15import org.junit.Test;16import org.junit.runners.MethodSorters;17import static org.junit.Assert.*;18//@FixMethodOrder(MethodSorters.JVM)19// Leaves the test methods in the order returned by the JVM. This order may vary from run to run.20@FixMethodOrder(MethodSorters.NAME_ASCENDING)21// Sorts the test methods by method name, in lexicographic order.22public class AssertTests {23	@Test24	public void testAssertArrayEquals() {25		byte[] expected = "trial".getBytes();...

Source:UserDaoTest.java

...11//import static org.hamcrest.CoreMatchers.not;12//import static org.hamcrest.CoreMatchers.sameInstance;13//import static org.hamcrest.CoreMatchers.startsWith;14//import static org.junit.Assert.assertThat;15//import static org.junit.matchers.JUnitMatchers.both;16//import static org.junit.matchers.JUnitMatchers.containsString;17//import static org.junit.matchers.JUnitMatchers.everyItem;18//import static org.junit.matchers.JUnitMatchers.hasItems;19import org.springframework.beans.factory.annotation.Autowired;20import com.jlinfo.admin.model.User;21public class UserDaoTest extends BaseDaoTestCase {22	public UserDaoTest() {23	}24	@Autowired25	private UserDao userMapper;26    private final AtomicLong idGen = new AtomicLong();27	@Before28	public void init() {29	}30	// @Ignore("Test is ignored as a demonstration")31	@Test32	public void insert() {...

Source:JunitTest.java

...4import static org.hamcrest.CoreMatchers.not;5import static org.hamcrest.CoreMatchers.nullValue;6import static org.junit.Assert.assertThat;7import static org.junit.Assert.assertTrue;8import static org.junit.matchers.JUnitMatchers.either;910import java.util.HashSet;11import java.util.Set;1213import org.junit.Test;14import org.junit.runner.RunWith;15import org.springframework.beans.factory.annotation.Autowired;16import org.springframework.context.ApplicationContext;17import org.springframework.test.context.ContextConfiguration;18import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;1920//2-2421@RunWith(SpringJUnit4ClassRunner.class)22@ContextConfiguration(locations = "junit.xml")23public class JunitTest {24	@Autowired25	ApplicationContext context;26	27	static Set<JunitTest> testObjects = new HashSet<>();28	static ApplicationContext contextObject = null;29	30	@Test31	public void test1() {32		assertThat(testObjects,  not(org.junit.matchers.JUnitMatchers.hasItem((this))));33		testObjects.add(this);34		assertThat(contextObject == null || contextObject == this.context,  is(true));35	}36	37	@Test38	public void test3() {39		assertTrue(contextObject == null || contextObject == this.context);40		testObjects.add(this);41	}42	@Test43	public void test2() {44		assertThat(testObjects,  not(org.junit.matchers.JUnitMatchers.hasItem((this))));45		assertThat(contextObject, either(is(nullValue())).or(is(this.context)));46		testObjects.add(this);47	}48}
...

Source:MainTest.java

...11import static org.hamcrest.CoreMatchers.sameInstance;12import static org.hamcrest.CoreMatchers.startsWith;13import static org.junit.Assert.assertThat;14import static org.junit.Assert.assertEquals;15import static org.junit.matchers.JUnitMatchers.both;16import static org.junit.matchers.JUnitMatchers.containsString;17import static org.junit.matchers.JUnitMatchers.everyItem;18import static org.junit.matchers.JUnitMatchers.hasItems;19import java.util.List;20import java.util.ArrayList;21import java.util.Arrays;22import java.util.Iterator;23import java.util.Random;24import java.net.URL;25import java.io.File;26import org.junit.rules.ErrorCollector;27import org.junit.Rule;28import javax.xml.bind.DatatypeConverter;29import com.google.common.base.Joiner;30public class MainTest {31    @Test32    public void thisAlwaysPasses() {...

Source:UtilTest.java

...11import static org.hamcrest.CoreMatchers.sameInstance;12import static org.hamcrest.CoreMatchers.startsWith;13import static org.junit.Assert.assertThat;14import static org.junit.Assert.assertEquals;15import static org.junit.matchers.JUnitMatchers.both;16import static org.junit.matchers.JUnitMatchers.containsString;17import static org.junit.matchers.JUnitMatchers.everyItem;18import static org.junit.matchers.JUnitMatchers.hasItems;19import java.util.List;20import java.util.ArrayList;21import java.util.Arrays;22import java.util.Iterator;23import java.util.Random;24import java.net.URL;25import java.io.File;26import org.junit.rules.ErrorCollector;27import org.junit.Rule;28import javax.xml.bind.DatatypeConverter;29import com.google.common.base.Joiner;30public class UtilTest {31    @Test32    public void thisAlwaysPasses() {...

Source:DummyTest.java

...11import static org.hamcrest.CoreMatchers.sameInstance;12import static org.hamcrest.CoreMatchers.startsWith;13import static org.junit.Assert.assertThat;14import static org.junit.Assert.assertEquals;15import static org.junit.matchers.JUnitMatchers.both;16import static org.junit.matchers.JUnitMatchers.containsString;17import static org.junit.matchers.JUnitMatchers.everyItem;18import static org.junit.matchers.JUnitMatchers.hasItems;19import java.util.List;20import java.util.ArrayList;21/**22 * Tests for {@link dummy}.23 *24 * @author mperdikeas@sciops.esa.int25 */26public class DummyTest {27    @Test28    public void thisAlwaysPasses() {29    }30    @Test31    @Ignore32    public void thisIsIgnored() {...

Source:MyMathTest.java

...8import static org.hamcrest.CoreMatchers.not;9import static org.hamcrest.CoreMatchers.sameInstance;10import static org.hamcrest.CoreMatchers.startsWith;11import static org.junit.Assert.*;12import static org.junit.matchers.JUnitMatchers.both;13import static org.junit.matchers.JUnitMatchers.containsString;14import static org.junit.matchers.JUnitMatchers.everyItem;15import static org.junit.matchers.JUnitMatchers.hasItems;16public class MyMathTest {17    @Test18    public void testArrayEqual(){19        byte[] exp = "trial".getBytes();20        byte[] actual = "trial".getBytes();21        assertArrayEquals("test",exp,actual);22    }23    @Test24    public void testEquals(){25        assertEquals("test equal","test","test");26    }27    @Test28    public void testAssertFalse(){29        Assert.assertFalse("asd",true);...

JUnitMatchers

Using AI Code Generation

1import org.junit.matchers.JUnitMatchers2import org.hamcrest.HamcrestMatchers3import org.hamcrest.core.HamcrestCoreMatchers4import org.hamcrest.collection.HamcrestCollectionMatchers5import org.hamcrest.text.HamcrestTextMatchers6import org.hamcrest.object.HamcrestObjectMatchers7import org.hamcrest.HamcrestStringMatcher8import org.hamcrest.HamcrestStringDescription9import org.hamcrest.HamcrestDescription10import org.hamcrest.HamcrestTypeSafeMatcher11import org.hamcrest.HamcrestBaseMatcher12import org.hamcrest.HamcrestTypeSafeDiagnosingMatcher13import org.hamcrest.HamcrestBaseDiagnosingMatcher14import org.hamcrest.HamcrestTypeSafeDiagnosingMatcher15import org.hamcrest.HamcrestBaseDiagnosingMatcher16import org.hamcrest.HamcrestTypeSafeDiagnosingMatcher17import org.hamcrest.HamcrestBaseDiagnosingMatcher18import org.hamcrest.HamcrestTypeSafeDiagnosingMatcher19import org.hamcrest.HamcrestBaseDiagnosingMatcher

JUnitMatchers

Using AI Code Generation

1import java.util.ArrayList;2import java.util.List;3import org.junit.Before;4import org.junit.Test;5public class JUnitMatchersTest {6    private List<String> values;7    public void setUp() {8        values = new ArrayList<String>();9        values.add("X");10        values.add("Y");11        values.add("Z");12    }13    public void testWithoutHamcrest() {14        assertTrue(values.contains("one")15                || values.contains("two")16                || values.contains("three"));17    }18    public void testWithHamcrest() {19        assertThat(values, hasItems("one", "two", "three"));20    }21}

JUnitMatchers

Using AI Code Generation

1import org.junit.matchers.JUnitMatchers;2import static org.junit.matchers.JUnitMatchers.*;3import static org.hamcrest.MatcherAssert.assertThat;4public class JUnitMatchersTest {5    public void test() {6        assertThat("Hello World", both(containsString("Hello")).and(containsString("World")));7        assertThat("Hello World", either(containsString("Hello")).or(containsString("World")));8        assertThat("Hello World", not(containsString("Hello")));9    }10}

JUnitMatchers

Using AI Code Generation

1import org.junit.matchers.JUnitMatchers;2import org.junit.Test;3import static org.junit.Assert.assertThat;4public class MyTest {5    public void test() {6        assertThat("This is a test", JUnitMatchers.containsString("test"));7    }8}

JUnitMatchers

Using AI Code Generation

1import org.junit.matchers.JUnitMatchers;2import java.util.ArrayList;3import java.util.List;4import static org.hamcrest.MatcherAssert.assertThat;5import static org.hamcrest.Matchers.*;6public class Test {7    public static void main(String[] args) {8        List<String> list = new ArrayList<String>();9        list.add("one");10        list.add("two");11        list.add("three");12        assertThat(list, hasItems("one", "three"));13    }14}15    at Test.main(Test.java:8)16    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)17    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)18    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)19    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

JUnitMatchers

Using AI Code Generation

1assertThat("Hello World", containsString("Hello"));2assertThat("Hello World", containsString("World"));3assertThat("Hello World", containsString("Hello World"));4assertThat("Hello World", containsString("World Hello"));5assertThat("Hello World", containsString("Hello"));6assertThat("Hello World", containsString("World"));7assertThat("Hello World", containsString("Hello World"));8assertThat("Hello World", containsString("World Hello"));9assertThat("Hello World", containsString("Hello"));10assertThat("Hello World", containsString("World"));11assertThat("Hello World", containsString("Hello World"));12assertThat("Hello World", containsString("

JUnitMatchers

Using AI Code Generation

1assertThat(list, empty());2assertThat(list, hasItem("item"));3assertThat(list, hasItems("item1", "item2"));4assertThat(list, hasItems("item1", "item2", "item3"));5assertThat(list, hasItems("item1", "item2", "item3", "item4"));6assertThat(list, hasItems("item1", "item2", "item3", "item4", "item5"));7assertThat(list, hasItems("item1", "item2", "item3", "item4", "item5", "item6"));8assertThat(list, hasItems("item1", "item2", "item3", "item4", "item5", "item6", "item7"));9assertThat(list, hasItems("item1", "item2", "item3", "item4", "item5", "item6", "item7", "item8"));10assertThat(list, hasItems("item1", "item2", "item3", "item4", "item5", "item6", "item7", "item8", "item9"));11assertThat(list, hasItems("item1", "item2", "item3", "item4", "item5", "item6", "item7", "item8", "item9", "item10"));12assertThat(list, hasItems("item1", "item2", "item3", "item4", "item5", "item6", "item7", "item8", "item9", "item10", "item11"));13assertThat(list, hasItems("item1", "item2", "item3", "item4",

JUnitMatchers

Using AI Code Generation

1import org.junit.matchers.JUnitMatchers2assertThat list, hasItem(3)3assertThat list, hasItems(3,4)4assertThat list, hasItems(3,4,5)5assertThat list, hasItems(3,4,5,6)6assertThat list, hasItems(3,4,5,6,7)7import org.hamcrest.Matchers8assertThat list, Matchers.hasItem(3)9assertThat list, Matchers.hasItems(3,4)10assertThat list, Matchers.hasItems(3,4,5)11assertThat list, Matchers.hasItems(3,4,5,6)12assertThat list, Matchers.hasItems(3,4,5,6,7)

Source: Want a JUnitMatchers AssertThat to test string contains 3 or more sub strings (currently using assertThat ... both ... and ....)

1WebDriver driver = new FirefoxDriver();2//create an object of EventFiringWebDriver and pass the driver instance3EventFiringWebDriver wd = new EventFiringWebDriver(driver);4//create an object of  class WebDriverListener and pass the driver instance5WebDriverListener eventListener = new WebDriverListener(driver);6wd.register(eventListener);7

Source:Want a JUnitMatchers AssertThat to test string contains 3 or more sub strings (currently using assertThat ... both ... and ....)

WebDriver driver = new FirefoxDriver();
//create an object of EventFiringWebDriver and pass the driver instance
EventFiringWebDriver wd = new EventFiringWebDriver(driver);
//create an object of  class WebDriverListener and pass the driver instance
WebDriverListener eventListener = new WebDriverListener(driver);
wd.register(eventListener);

Source: JUnit: testing an object is not in a list

1import java.io.File;2import java.io.IOException;3import java.util.TimerTask;4import java.util.Date;56import org.apache.commons.io.FileUtils;7import org.openqa.selenium.OutputType;8import org.openqa.selenium.TakesScreenshot;9// Create a class extends with TimerTask10public class TakeScreenShot extends TimerTask {1112    public static String screenTitle;1314    public TakeScreenShot(String screenTitle){//constructor to initialize screenTitle15        this.screenTitle=screenTitle;16    }1718    // Add your task here19    public void run() {20        if(screenTitle.equals(driver.getTitle().trim())){21            //do nothing; // as long as we are on same page dont take screenshot again.22        }else{23            screenTitle=driver.getTitle().trim();//if page changes then, take screenshot24            File scrFile = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);25            try {26                FileUtils.copyFile(scrFile, new File("C:\\"+screenTitle+".png"));27            } catch (IOException e) {28                e.printStackTrace();29            }30        }3132    }33}34

Source:JUnit: testing an object is not in a list

import java.io.File;
import java.io.IOException;
import java.util.TimerTask;
import java.util.Date;

import org.apache.commons.io.FileUtils;
import org.openqa.selenium.OutputType;
import org.openqa.selenium.TakesScreenshot;
// Create a class extends with TimerTask
public class TakeScreenShot extends TimerTask {

    public static String screenTitle;

    public TakeScreenShot(String screenTitle){//constructor to initialize screenTitle
        this.screenTitle=screenTitle;
    }

    // Add your task here
    public void run() {
        if(screenTitle.equals(driver.getTitle().trim())){
            //do nothing; // as long as we are on same page dont take screenshot again.
        }else{
            screenTitle=driver.getTitle().trim();//if page changes then, take screenshot
            File scrFile = ((TakesScreenshot)driver).getScreenshotAs(OutputType.FILE);
            try {
                FileUtils.copyFile(scrFile, new File("C:\\"+screenTitle+".png"));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}

JUnit Tutorial:

LambdaTest also has a detailed JUnit tutorial explaining its features, importance, advanced use cases, best practices, and more to help you get started with running your automation testing scripts.

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.