KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta 
How to use assertThatIllegalStateException method of org.assertj.core.api.Assertions class
Best Assertj code snippet using org.assertj.core.api.Assertions.assertThatIllegalStateException
Source:ChangesModuleTest.java 
2import org.assertj.core.api.Assertions;3import org.junit.jupiter.api.Test;4import org.junit.jupiter.params.ParameterizedTest;5import org.junit.jupiter.params.provider.ValueSource;6import static org.assertj.core.api.Assertions.assertThatIllegalStateException;7import static org.assertj.core.api.AssertionsForClassTypes.assertThat;8import static org.assertj.core.api.AssertionsForClassTypes.assertThatThrownBy;9class ChangesModuleTest {10 @Test11 public void ìë_모ë_ìì±(){12 ChangesModule changesModule = new ChangesModule();13 Assertions.assertThat(changesModule).isNotNull();14 }15 @ParameterizedTest(name = "ìí기ì {0}ìì ë£ì¼ë©´ {0}ìì´ ë¤ì´ììì ì ì ìë¤")16 @ValueSource(ints = {500, 1000})17 void ìí기ì_nìì_ë£ì¼ë©´_nìì´_ë¤ì´ììì_ì_ì_ìë¤(int changes){18 ChangesModule changesModule = new ChangesModule();19 changesModule.put(changes);20 assertThat(changesModule.getChanges()).isEqualTo(changes);21 }22 @Test23 void _1000ìì´_ë¤ì´ìë_ìí기ì_500ìì_ë£ì¼ë©´_1500ìì´_ë¤ì´ììì_ì_ì_ìë¤(){24 ChangesModule changesModule = new ChangesModule(1000);25 changesModule.put(500);26 assertThat(changesModule.getChanges()).isEqualTo(1500);27 }28 @Test29 void _500ìì´_ë¤ì´ìë_ìí기ì_500ìì_ì°¨ê°íë©´_0ìì´_ëë¤(){30 ChangesModule changesModule = new ChangesModule(500);31 changesModule.withdraw(500);32 assertThat(changesModule.getChanges()).isEqualTo(0);33 }34 @Test35 void _0ìì´_ë¤ì´ìë_ìí기ì_500ìì_ì°¨ê°íë©´_ì°¨ê°í _ì_ìë¤(){36 ChangesModule changesModule = new ChangesModule(0);37 assertThatIllegalStateException()38 .isThrownBy(() -> changesModule.withdraw(500));39 }40}...
Source:CatTests.java
...9import java.time.LocalDate;10import org.junit.jupiter.api.Test;11import static org.assertj.core.api.Assertions.assertThat;12import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;13import static org.assertj.core.api.Assertions.assertThatIllegalStateException;14import static org.assertj.core.api.Assertions.assertThatNoException;15/**16 * @author Madhura Bhave17 */18class CatTests {19 @Test20 void createCatWithValidNameShouldSucceed() {21 assertThatNoException().isThrownBy(() -> new Cat("Toby"));22 }23 @Test24 void createCatWithShortNameShouldThrowException() {25 assertThatIllegalStateException().isThrownBy(() -> new Cat("tom"));26 }27 @Test28 void createCatWithLowercaseNameShouldThrowException() {29 assertThatIllegalArgumentException().isThrownBy(() -> new Cat("a"));30 }31 @Test32 void getNameShouldReturnName() {33 Cat cat = new Cat("Toby");34 assertThat(cat.getName()).isEqualTo("Toby");35 }36 @Test37 void getAgeShouldReturnAge() {38 Cat cat = new Cat("Toby", LocalDate.now().minusMonths(3));39 assertThat(cat.getAgeInMonths()).isEqualTo(3);...
assertThatIllegalStateException
Using AI Code Generation
1package org.example;2import org.assertj.core.api.Assertions;3import org.junit.jupiter.api.Test;4public class AppTest {5 public void testAssertThatIllegalStateException() {6 Assertions.assertThatIllegalStateException().isThrownBy(() -> {7 throw new IllegalStateException("I'm an exception");8 }).withMessage("I'm an exception");9 }10}11org.example.AppTest > testAssertThatIllegalStateException() PASSED
assertThatIllegalStateException
Using AI Code Generation
1import org.assertj.core.api.Assertions;2public class App {3 public static void main(String[] args) {4 Assertions.assertThatIllegalStateException().isThrownBy(() -> {5 throw new IllegalStateException("boom!");6 }).withMessage("boom!");7 }8}9import org.assertj.core.api.Assertions;10public class App {11 public static void main(String[] args) {12 Assertions.assertThatIllegalArgumentException().isThrownBy(() -> {13 throw new IllegalArgumentException("boom!");14 }).withMessage("boom!");15 }16}17import org.assertj.core.api.Assertions;18public class App {19 public static void main(String[] args) {20 Assertions.assertThatIllegalStateException().isThrownBy(() -> {21 throw new IllegalStateException("boom!");22 }).withMessage("boom!");23 }24}25import org.assertj.core.api.Assertions;26public class App {27 public static void main(String[] args) {28 Assertions.assertThatIllegalArgumentException().isThrownBy(() -> {29 throw new IllegalArgumentException("boom!");30 }).withMessage("boom!");31 }32}33import org.assertj.core.api.Assertions;34public class App {35 public static void main(String[] args) {36 Assertions.assertThatIllegalStateException().isThrownBy(() -> {37 throw new IllegalStateException("boom!");38 }).withMessage("boom!");39 }40}41import org.assertj.core.api.Assertions;42public class App {
assertThatIllegalStateException
Using AI Code Generation
1package com.puppycrawl.tools.checkstyle.checks.coding;2import static org.assertj.core.api.Assertions.assertThatIllegalStateException;3public class InputRequireThisTest {4 public void test() {5 assertThatIllegalStateException()6 .isThrownBy(() -> {
assertThatIllegalStateException
Using AI Code Generation
1import org.assertj.core.api.Assertions;2import org.junit.jupiter.api.Test;3public class AssertionsDemo {4 public void test() {5 Assertions.assertThatIllegalStateException().isThrownBy(() -> {6 throw new IllegalStateException("boom!");7 }).withMessage("boom!").withMessageContaining("boom").withNoCause();8 }9}10 at org.junit.jupiter.api.AssertThrows.assertThrows(AssertThrows.java:66)11 at org.junit.jupiter.api.AssertThrows.assertThrows(AssertThrows.java:36)12 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1320)13 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1308)14 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1298)15 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1294)16 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1290)17 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1286)18 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1282)19 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1278)20 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1274)21 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1270)22 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1266)23 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1262)24 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1258)25 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1254)26 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1249)27 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1245)28 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1241)29 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1237)30 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1233)31 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1229)32 at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1225)
assertThatIllegalStateException
Using AI Code Generation
1import org.assertj.core.api.Assertions;2import org.junit.jupiter.api.Test;3import java.util.*;4import java.util.function.*;5import java.util.stream.*;6import java.util.concurrent.*;7import java.util.concurrent.atomic.*;8import java.util.concurrent.locks.*;9import java.util.regex.*;10import java.util.regex.Pattern;11public class 1 {12 public void test1() {13 Assertions.assertThatIllegalStateException().isThrownBy(() -> {14 throw new IllegalStateException("boom");15 }).withMessage("boom");16 }17}18import org.assertj.core.api.Assertions;19import org.junit.jupiter.api.Test;20import java.util.*;21import java.util.function.*;22import java.util.stream.*;23import java.util.concurrent.*;24import java.util.concurrent.atomic.*;25import java.util.concurrent.locks.*;26import java.util.regex.*;27import java.util.regex.Pattern;28public class 2 {29 public void test1() {30 Assertions.assertThatIllegalArgumentException().isThrownBy(() -> {31 throw new IllegalArgumentException("boom");32 }).withMessage("boom");33 }34}35import org.assertj.core.api.Assertions;36import org.junit.jupiter.api.Test;37import java.util.*;38import java.util.function.*;39import java.util.stream.*;40import java.util.concurrent.*;41import java.util.concurrent.atomic.*;42import java.util.concurrent.locks.*;43import java.util.regex.*;44import java.util.regex.Pattern;45public class 3 {46 public void test1() {47 Assertions.assertThatIllegalStateException().isThrownBy(() -> {48 throw new IllegalStateException("boom");49 }).withMessage("boom");50 }51}52import org.assertj.core.api.Assertions;53import org.junit.jupiter.api.Test;54import java.util.*;55import java.util.function.*;56import java.util.stream.*;57import java.util.concurrent.*;58import java.util.concurrent.atomic.*;59import java.util.concurrent.locks.*;60import java.util.regex.*;61import java.util
assertThatIllegalStateException
Using AI Code Generation
1import org.assertj.core.api.Assertions;2import org.assertj.core.api.ThrowableAssert.ThrowingCallable;3import org.junit.Test;4public class AssertJAssertions {5 public void assertThatIllegalStateExceptionMethod() {6 ThrowingCallable codeThrowingException = () -> {7 throw new IllegalStateException("boom!");8 };9 Assertions.assertThatExceptionOfType(IllegalStateException.class)10 .isThrownBy(codeThrowingException)11 .withMessage("boom!")12 .withMessageContaining("boom")13 .withNoCause();14 }15}16 at org.assertj.core.api.ThrowableAssert.catchThrowable(ThrowableAssert.java:60)17 at org.assertj.core.api.AssertionsForClassTypes.catchThrowable(AssertionsForClassTypes.java:769)18 at org.assertj.core.api.AssertionsForClassTypes.assertThatExceptionOfType(AssertionsForClassTypes.java:723)19 at org.assertj.core.api.Assertions.assertThatExceptionOfType(Assertions.java:2302)20 at org.example.AssertJAssertions.assertThatIllegalStateExceptionMethod(AssertJAssertions.java:13)21 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)22 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)23 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)24 at java.lang.reflect.Method.invoke(Method.java:498)25 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)26 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)27 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)28 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)29 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)30 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)31 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)32 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)33 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)34 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)35 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
assertThatIllegalStateException
Using AI Code Generation
1public class AssertJTest {2 public void testAssertThatIllegalStateException() {3 try {4 } catch (IllegalStateException e) {5 assertThatIllegalStateException().hasMessage("message");6 }7 }8}9public class AssertJTest {10 public void testAssertThatIllegalStateException() {11 try {12 } catch (IllegalStateException e) {13 assertThatIllegalStateException().hasMessage("message");14 }15 }16}17public class AssertJTest {18 public void testAssertThatIllegalStateException() {19 try {20 } catch (IllegalStateException e) {21 assertThatIllegalStateException().hasMessage("message");22 }23 }24}25public class AssertJTest {26 public void testAssertThatIllegalStateException() {27 try {28 } catch (IllegalStateException e) {29 assertThatIllegalStateException().hasMessage("message");30 }31 }32}33public class AssertJTest {34 public void testAssertThatIllegalStateException() {35 try {36 } catch (IllegalStateException e) {37 assertThatIllegalStateException().hasMessage("message");38 }39 }40}41public class AssertJTest {42 public void testAssertThatIllegalStateException() {43 try {44 } catch (IllegalStateException e) {45 assertThatIllegalStateException().hasMessage("message");46 }47 }48}49public class AssertJTest {50 public void testAssertThatIllegalStateException() {51 try {52 } catch (IllegalStateException e) {53 assertThatIllegalStateException().hasMessage("message");54 }55 }56}
assertThatIllegalStateException
Using AI Code Generation
1import org.assertj.core.api.Assertions;2import org.junit.Test;3public class AssertJTest {4public void testAssertJ(){5Assertions.assertThatIllegalStateException()6.isInstanceOf(IllegalStateException.class)7.hasMessage("hello");8}9}10 at org.assertj.core.api.AbstractThrowableAssert.hasMessage(AbstractThrowableAssert.java:110)11 at AssertJTest.testAssertJ(AssertJTest.java:12)12 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)13 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)14 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)15 at java.lang.reflect.Method.invoke(Method.java:498)16 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)17 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)18 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)19 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)20 at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)21 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)22 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)23 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)24 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)25 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)26 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)27 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)28 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)29 at org.junit.runners.ParentRunner.run(ParentRunner.java:363)30 at org.junit.runner.JUnitCore.run(JUnitCore.java:137)31 at org.junit.runner.JUnitCore.run(JUnitCore.java:115)32 at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:43)33 at org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:82)34 at org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:73)
Automation Testing Tutorials
Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
LambdaTest Learning Hubs:
- JUnit Tutorial
- TestNG Tutorial
- Webdriver Tutorial
- WebDriverIO Tutorial
- Protractor Tutorial
- Selenium 4 Tutorial
- Jenkins Tutorial
- NUnit Tutorial
- Jest Tutorial
- Playwright Tutorial
- Cypress Tutorial
- PyTest Tutorial
YouTube
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Run Assertj automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Most used method in Assertions
- Assertions
- assertThat
- assertThatPredicate
- createAssert
- testException
- assertThatThrownBy
- assertThatCode
- assertThatObject
- assertWith
- catchThrowable
- TextException
- catchThrowableOfType
- catchException
- catchRuntimeException
- catchNullPointerException
- catchIllegalArgumentException
- catchIOException
- catchReflectiveOperationException
- catchIllegalStateException
- catchIndexOutOfBoundsException
- assertThatExceptionOfType
- assertThatNoException
- assertThatNullPointerException
- assertThatIllegalArgumentException
- assertThatIOException
- assertThatIllegalStateException
- assertThatException
- assertThatRuntimeException
- assertThatReflectiveOperationException
- assertThatIndexOutOfBoundsException
- setRemoveAssertJRelatedElementsFromStackTrace
- fail
- failBecauseExceptionWasNotThrown
- shouldHaveThrown
- setMaxLengthForSingleLineDescription
- setMaxElementsForPrinting
- setPrintAssertionsDescription
- setDescriptionConsumer
- setMaxStackTraceElementsDisplayed
- extractProperty
- tuple
- setAllowExtractingPrivateFields
- setAllowComparingPrivateFields
- setExtractBareNamePropertyMethods
- entry
- atIndex
- offset
- within
- withPrecision
- withMarginOf
- withinPercentage
- byLessThan
- from
- allOf
- anyOf
- doesNotHave
- filter
- notIn
- contentOf
- linesOf
- setLenientDateParsing
- registerCustomDateFormat
- useDefaultDateFormatsOnly
- assertThatIterable
- assertThatIterator
- assertThatCollection
- assertThatList
- assertThatStream
- assertThatPath
- assertThatComparable
- isBlinking
- setBlinking
- AssertDelegateTarget_example
- toStringOf
- useRepresentation
- registerFormatterForType
- useDefaultRepresentation
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
