How to use isPresent method of org.assertj.core.api.AbstractOptionalAssert class

Best Assertj code snippet using org.assertj.core.api.AbstractOptionalAssert.isPresent

Source:AbstractOptionalAssert.java Github

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...47 /**48 * Verifies that there is a value present in the actual {@link java.util.Optional}.49 * <p>50 * Assertion will pass :51 * <pre><code class='java'> assertThat(Optional.of("something")).isPresent();</code></pre>52 *53 * Assertion will fail :54 * <pre><code class='java'> assertThat(Optional.empty()).isPresent();</code></pre> 55 *56 * @return this assertion object.57 */58 public SELF isPresent() {59 assertValueIsPresent();60 return myself;61 }62 /**63 * Verifies that there is a value present in the actual {@link java.util.Optional}, it's an alias of {@link #isPresent()}.64 * <p>65 * Assertion will pass :66 * <pre><code class='java'> assertThat(Optional.of("something")).isNotEmpty();</code></pre>67 *68 * Assertion will fail :69 * <pre><code class='java'> assertThat(Optional.empty()).isNotEmpty();</code></pre>70 *71 * @return this assertion object.72 */73 public SELF isNotEmpty() {74 return isPresent();75 }76 /**77 * Verifies that the actual {@link java.util.Optional} is empty.78 * <p>79 * Assertion will pass :80 * <pre><code class='java'> assertThat(Optional.empty()).isEmpty();</code></pre>81 *82 * Assertion will fail :83 * <pre><code class='java'> assertThat(Optional.of("something")).isEmpty();</code></pre>84 *85 * @return this assertion object.86 */87 public SELF isEmpty() {88 isNotNull();89 if (actual.isPresent()) throwAssertionError(shouldBeEmpty(actual));90 return myself;91 }92 /**93 * Verifies that the actual {@link java.util.Optional} is empty (alias of {@link #isEmpty()}).94 * <p>95 * Assertion will pass :96 * <pre><code class='java'> assertThat(Optional.empty()).isNotPresent();</code></pre>97 *98 * Assertion will fail :99 * <pre><code class='java'> assertThat(Optional.of("something")).isNotPresent();</code></pre>100 *101 * @return this assertion object.102 */103 public SELF isNotPresent() {104 return isEmpty();105 }106 /**107 * Verifies that the actual {@link java.util.Optional} contains the given value (alias of {@link #hasValue(Object)}).108 * <p>109 * Assertion will pass :110 * <pre><code class='java'> assertThat(Optional.of("something")).contains("something");111 * assertThat(Optional.of(10)).contains(10);</code></pre>112 *113 * Assertion will fail :114 * <pre><code class='java'> assertThat(Optional.of("something")).contains("something else");115 * assertThat(Optional.of(20)).contains(10);</code></pre>116 *117 * @param expectedValue the expected value inside the {@link java.util.Optional}.118 * @return this assertion object.119 */120 public SELF contains(VALUE expectedValue) {121 isNotNull();122 checkNotNull(expectedValue);123 if (!actual.isPresent()) throwAssertionError(shouldContain(expectedValue));124 if (!optionalValueComparisonStrategy.areEqual(actual.get(), expectedValue))125 throwAssertionError(shouldContain(actual, expectedValue));126 return myself;127 }128 /**129 * Verifies that the actual {@link java.util.Optional} contains a value and gives this value to the given130 * {@link java.util.function.Consumer} for further assertions. Should be used as a way of deeper asserting on the131 * containing object, as further requirement(s) for the value.132 * <p>133 * Assertions will pass :134 * <pre><code class='java'> // one requirement 135 * assertThat(Optional.of(10)).hasValueSatisfying(i -&gt; { assertThat(i).isGreaterThan(9); });136 *137 * // multiple requirements138 * assertThat(Optional.of(someString)).hasValueSatisfying(s -&gt; {139 * assertThat(s).isEqualTo("something");140 * assertThat(s).startsWith("some");141 * assertThat(s).endsWith("thing");142 * }); </code></pre>143 *144 * Assertions will fail :145 * <pre><code class='java'> assertThat(Optional.of("something")).hasValueSatisfying(s -&gt; {146 * assertThat(s).isEqualTo("something else");147 * });148 *149 * // fail because optional is empty, there is no value to perform assertion on 150 * assertThat(Optional.empty()).hasValueSatisfying(o -&gt; {});</code></pre>151 *152 * @param requirement to further assert on the object contained inside the {@link java.util.Optional}.153 * @return this assertion object.154 */155 public SELF hasValueSatisfying(Consumer<VALUE> requirement) {156 assertValueIsPresent();157 requirement.accept(actual.get());158 return myself;159 }160 /**161 * Verifies that the actual {@link Optional} contains a value which satisfies the given {@link Condition}.162 * <p>163 * Examples:164 * <pre><code class='java'> Condition&lt;TolkienCharacter&gt; isAnElf = new Condition&lt;&gt;(character -&gt; character.getRace() == ELF, "an elf"); 165 * 166 * TolkienCharacter legolas = new TolkienCharacter("Legolas", 1000, ELF);167 * TolkienCharacter frodo = new TolkienCharacter("Frodo", 33, HOBBIT);168 * 169 * // assertion succeeds170 * assertThat(Optional.of(legolas)).hasValueSatisfying(isAnElf);171 * 172 * // assertion fails173 * assertThat(Optional.of(frodo)).hasValueSatisfying(isAnElf);</code></pre>174 *175 * @param condition the given condition.176 * @return this assertion object.177 * @throws AssertionError if the actual {@link Optional} is null or empty.178 * @throws NullPointerException if the given condition is {@code null}.179 * @throws AssertionError if the actual value does not satisfy the given condition.180 * @since 3.6.0181 */182 public SELF hasValueSatisfying(Condition<? super VALUE> condition) {183 assertValueIsPresent();184 conditions.assertIs(info, actual.get(), condition);185 return myself;186 }187 /**188 * Verifies that the actual {@link java.util.Optional} contains the given value (alias of {@link #contains(Object)}).189 * <p>190 * Assertion will pass :191 * <pre><code class='java'> assertThat(Optional.of("something")).hasValue("something");192 * assertThat(Optional.of(10)).contains(10);</code></pre>193 *194 * Assertion will fail :195 * <pre><code class='java'> assertThat(Optional.of("something")).hasValue("something else");196 * assertThat(Optional.of(20)).contains(10);</code></pre>197 *198 * @param expectedValue the expected value inside the {@link java.util.Optional}.199 * @return this assertion object.200 */201 public SELF hasValue(VALUE expectedValue) {202 return contains(expectedValue);203 }204 /**205 * Verifies that the actual {@link Optional} contains a value that is an instance of the argument.206 * <p>207 * Assertions will pass:208 *209 * <pre><code class='java'> assertThat(Optional.of("something")).containsInstanceOf(String.class)210 * .containsInstanceOf(Object.class);211 *212 * assertThat(Optional.of(10)).containsInstanceOf(Integer.class);</code></pre>213 *214 * Assertion will fail:215 *216 * <pre><code class='java'> assertThat(Optional.of("something")).containsInstanceOf(Integer.class);</code></pre>217 *218 * @param clazz the expected class of the value inside the {@link Optional}.219 * @return this assertion object.220 */221 public SELF containsInstanceOf(Class<?> clazz) {222 assertValueIsPresent();223 if (!clazz.isInstance(actual.get())) throwAssertionError(shouldContainInstanceOf(actual, clazz));224 return myself;225 }226 /**227 * Use field/property by field/property comparison (including inherited fields/properties) instead of relying on228 * actual type A <code>equals</code> method to compare the {@link Optional} value's object for incoming assertion229 * checks. Private fields are included but this can be disabled using230 * {@link Assertions#setAllowExtractingPrivateFields(boolean)}.231 * <p>232 * This can be handy if <code>equals</code> method of the {@link Optional} value's object to compare does not suit233 * you.234 * </p>235 * Note that the comparison is <b>not</b> recursive, if one of the fields/properties is an Object, it will be236 * compared to the other field/property using its <code>equals</code> method.237 * <p>238 * Example:239 *240 * <pre><code class='java'> TolkienCharacter frodo = new TolkienCharacter("Frodo", 33, HOBBIT);241 * TolkienCharacter frodoClone = new TolkienCharacter("Frodo", 33, HOBBIT);242 *243 * // Fail if equals has not been overridden in TolkienCharacter as equals default implementation only compares references244 * assertThat(Optional.of(frodo)).contains(frodoClone);245 *246 * // frodo and frodoClone are equals when doing a field by field comparison.247 * assertThat(Optional.of(frodo)).usingFieldByFieldValueComparator().contains(frodoClone);</code></pre>248 *249 * @return {@code this} assertion object.250 */251 @CheckReturnValue252 public SELF usingFieldByFieldValueComparator() {253 return usingValueComparator(new FieldByFieldComparator());254 }255 /**256 * Use given custom comparator instead of relying on actual type A <code>equals</code> method to compare the257 * {@link Optional} value's object for incoming assertion checks.258 * <p>259 * Custom comparator is bound to assertion instance, meaning that if a new assertion is created, it will use default260 * comparison strategy.261 * <p>262 * Examples :263 *264 * <pre><code class='java'> TolkienCharacter frodo = new TolkienCharacter("Frodo", 33, HOBBIT);265 * TolkienCharacter frodoClone = new TolkienCharacter("Frodo", 33, HOBBIT);266 *267 * // Fail if equals has not been overridden in TolkienCharacter as equals default implementation only compares references268 * assertThat(Optional.of(frodo)).contains(frodoClone);269 *270 * // frodo and frodoClone are equals when doing a field by field comparison.271 * assertThat(Optional.of(frodo)).usingValueComparator(new FieldByFieldComparator()).contains(frodoClone);</code></pre>272 *273 * @param customComparator the comparator to use for incoming assertion checks.274 * @throws NullPointerException if the given comparator is {@code null}.275 * @return {@code this} assertion object.276 */277 @CheckReturnValue278 public SELF usingValueComparator(Comparator<? super VALUE> customComparator) {279 optionalValueComparisonStrategy = new ComparatorBasedComparisonStrategy(customComparator);280 return myself;281 }282 /**283 * Revert to standard comparison for incoming assertion {@link Optional} value checks.284 * <p>285 * This method should be used to disable a custom comparison strategy set by calling286 * {@link #usingValueComparator(Comparator)}.287 *288 * @return {@code this} assertion object.289 */290 @CheckReturnValue291 public SELF usingDefaultValueComparator() {292 // fall back to default strategy to compare actual with other objects.293 optionalValueComparisonStrategy = StandardComparisonStrategy.instance();294 return myself;295 }296 /**297 * Verifies that the actual {@link java.util.Optional} contains the instance given as an argument (i.e. it must be the298 * same instance).299 * <p>300 * Assertion will pass :301 *302 * <pre><code class='java'> String someString = "something";303 * assertThat(Optional.of(someString)).containsSame(someString);304 *305 * // Java will create the same 'Integer' instance when boxing small ints306 * assertThat(Optional.of(10)).containsSame(10);</code></pre>307 *308 * Assertion will fail :309 *310 * <pre><code class='java'> // not even equal:311 * assertThat(Optional.of("something")).containsSame("something else");312 * assertThat(Optional.of(20)).containsSame(10);313 *314 * // equal but not the same: 315 * assertThat(Optional.of(new String("something"))).containsSame(new String("something"));316 * assertThat(Optional.of(new Integer(10))).containsSame(new Integer(10));</code></pre>317 *318 * @param expectedValue the expected value inside the {@link java.util.Optional}.319 * @return this assertion object.320 */321 public SELF containsSame(VALUE expectedValue) {322 isNotNull();323 checkNotNull(expectedValue);324 if (!actual.isPresent()) throwAssertionError(shouldContain(expectedValue));325 if (actual.get() != expectedValue) throwAssertionError(shouldContainSame(actual, expectedValue));326 return myself;327 }328 /**329 * Call {@link Optional#flatMap(Function) flatMap} on the {@code Optional} under test, assertions chained afterwards are performed on the {@code Optional} resulting from the flatMap call.330 * <p>331 * Examples:332 * <pre><code class='java'> Function&lt;String, Optional&lt;String&gt;&gt; UPPER_CASE_OPTIONAL_STRING = 333 * s -&gt; s == null ? Optional.empty() : Optional.of(s.toUpperCase());334 * 335 * // assertions succeed336 * assertThat(Optional.of("something")).contains("something")337 * .flatMap(UPPER_CASE_OPTIONAL_STRING)338 * .contains("SOMETHING");339 * 340 * assertThat(Optional.&lt;String&gt;empty()).flatMap(UPPER_CASE_OPTIONAL_STRING)341 * .isEmpty();342 * 343 * assertThat(Optional.&lt;String&gt;ofNullable(null)).flatMap(UPPER_CASE_OPTIONAL_STRING)344 * .isEmpty();345 * 346 * // assertion fails347 * assertThat(Optional.of("something")).flatMap(UPPER_CASE_OPTIONAL_STRING)348 * .contains("something");</code></pre>349 *350 * @param <U> the type wrapped in the {@link Optional} after the {@link Optional#flatMap(Function) flatMap} operation.351 * @param mapper the {@link Function} to use in the {@link Optional#flatMap(Function) flatMap} operation.352 * @return a new {@link AbstractOptionalAssert} for assertions chaining on the flatMap of the Optional.353 * @throws AssertionError if the actual {@link Optional} is null.354 * @since 3.6.0355 */356 @CheckReturnValue357 public <U> AbstractOptionalAssert<?, U> flatMap(Function<? super VALUE, Optional<U>> mapper) {358 isNotNull();359 return assertThat(actual.flatMap(mapper));360 }361 /**362 * Call {@link Optional#map(Function) map} on the {@code Optional} under test, assertions chained afterwards are performed on the {@code Optional} resulting from the map call.363 * <p>364 * Examples:365 * <pre><code class='java'> // assertions succeed 366 * assertThat(Optional.&lt;String&gt;empty()).map(String::length)367 * .isEmpty();368 * 369 * assertThat(Optional.of("42")).contains("42")370 * .map(String::length)371 * .contains(2);372 * 373 * // assertion fails374 * assertThat(Optional.of("42")).map(String::length)375 * .contains(3);</code></pre>376 *377 * @param <U> the type wrapped in the {@link Optional} after the {@link Optional#map(Function) map} operation.378 * @param mapper the {@link Function} to use in the {@link Optional#map(Function) map} operation.379 * @return a new {@link AbstractOptionalAssert} for assertions chaining on the map of the Optional.380 * @throws AssertionError if the actual {@link Optional} is null.381 * @since 3.6.0382 */383 @CheckReturnValue384 public <U> AbstractOptionalAssert<?, U> map(Function<? super VALUE, ? extends U> mapper) {385 isNotNull();386 return assertThat(actual.map(mapper));387 }388 /**389 * Verifies that the actual {@link Optional} is not {@code null} and not empty and returns an Object assertion 390 * that allows chaining (object) assertions on the optional value.391 * <p>392 * Note that it is only possible to return Object assertions after calling this method due to java generics limitations. 393 * <p>394 * Example:395 * <pre><code class='java'> TolkienCharacter frodo = new TolkienCharacter("Frodo", 33, HOBBIT);396 * TolkienCharacter sam = new TolkienCharacter("Sam", 38, null);397 *398 * // assertion succeeds since all frodo's fields are set399 * assertThat(Optional.of(frodo)).get().hasNoNullFields();400 *401 * // assertion does not succeed because sam does not have its race set402 * assertThat(Optional.of(sam)).get().hasNoNullFields();</code></pre>403 *404 * @return a new {@link AbstractObjectAssert} for assertions chaining on the value of the Optional.405 * @throws AssertionError if the actual {@link Optional} is null.406 * @throws AssertionError if the actual {@link Optional} is empty.407 * @since 3.9.0408 */409 @CheckReturnValue410 public AbstractObjectAssert<?, VALUE> get() {411 isPresent();412 return assertThat(actual.get());413 }414 private void checkNotNull(Object expectedValue) {415 checkArgument(expectedValue != null, "The expected value should not be <null>.");416 }417 private void assertValueIsPresent() {418 isNotNull();419 if (!actual.isPresent()) throwAssertionError(shouldBePresent(actual));420 }421}...

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Source:AssertJOptionalRules.java Github

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...35 optionalAssert.isNotEmpty(), optionalAssert.isNotEqualTo(Optional.empty()));36 }37 @AfterTemplate38 AbstractOptionalAssert<?, T> after(AbstractOptionalAssert<?, T> optionalAssert) {39 return optionalAssert.isPresent();40 }41 }42 static final class AssertThatOptionalIsPresent<T> {43 @BeforeTemplate44 AbstractAssert<?, ?> before(Optional<T> optional) {45 return Refaster.anyOf(46 assertThat(optional.isPresent()).isTrue(), assertThat(optional.isEmpty()).isFalse());47 }48 @AfterTemplate49 @UseImportPolicy(STATIC_IMPORT_ALWAYS)50 OptionalAssert<T> after(Optional<T> optional) {51 return assertThat(optional).isPresent();52 }53 }54 static final class AbstractOptionalAssertIsEmpty<T> {55 @BeforeTemplate56 AbstractAssert<?, ?> before(AbstractOptionalAssert<?, T> optionalAssert) {57 return Refaster.anyOf(58 optionalAssert.isNotPresent(), optionalAssert.isEqualTo(Optional.empty()));59 }60 @AfterTemplate61 AbstractOptionalAssert<?, T> after(AbstractOptionalAssert<?, T> optionalAssert) {62 return optionalAssert.isEmpty();63 }64 }65 static final class AssertThatOptionalIsEmpty<T> {66 @BeforeTemplate67 AbstractAssert<?, ?> before(Optional<T> optional) {68 return Refaster.anyOf(69 assertThat(optional.isEmpty()).isTrue(), assertThat(optional.isPresent()).isFalse());70 }71 @AfterTemplate72 @UseImportPolicy(STATIC_IMPORT_ALWAYS)73 OptionalAssert<T> after(Optional<T> optional) {74 return assertThat(optional).isEmpty();75 }76 }77 static final class AbstractOptionalAssertHasValue<T> {78 @BeforeTemplate79 AbstractAssert<?, ?> before(AbstractOptionalAssert<?, T> optionalAssert, T value) {80 return Refaster.anyOf(81 optionalAssert.get().isEqualTo(value),82 optionalAssert.isEqualTo(Optional.of(value)),83 optionalAssert.contains(value),84 optionalAssert.isPresent().hasValue(value));85 }86 @AfterTemplate87 AbstractOptionalAssert<?, T> after(AbstractOptionalAssert<?, T> optionalAssert, T value) {88 return optionalAssert.hasValue(value);89 }90 }91 static final class AbstractOptionalAssertContainsSame<T> {92 @BeforeTemplate93 AbstractAssert<?, ?> before(AbstractOptionalAssert<?, T> optionalAssert, T value) {94 return Refaster.anyOf(95 optionalAssert.get().isSameAs(value), optionalAssert.isPresent().isSameAs(value));96 }97 @AfterTemplate98 AbstractOptionalAssert<?, T> after(AbstractOptionalAssert<?, T> optionalAssert, T value) {99 return optionalAssert.containsSame(value);100 }101 }102 static final class AssertThatOptionalHasValueMatching<T> {103 @BeforeTemplate104 AbstractOptionalAssert<?, T> before(Optional<T> optional, Predicate<? super T> predicate) {105 return assertThat(optional.filter(predicate)).isPresent();106 }107 @AfterTemplate108 @UseImportPolicy(STATIC_IMPORT_ALWAYS)109 AbstractObjectAssert<?, T> after(Optional<T> optional, Predicate<? super T> predicate) {110 return assertThat(optional).get().matches(predicate);111 }112 }113}...

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1import static org.assertj.core.api.Assertions.assertThat;2import java.util.Optional;3public class AssertJOptional {4 public static void main(String[] args) {5 Optional<String> optional = Optional.of("Hello");6 assertThat(optional).isPresent();7 }8}

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1import java.util.Optional;2import org.assertj.core.api.Assertions;3public class AssertJOptionalExample {4 public static void main(String[] args) {5 Optional<String> optional = Optional.of("Hello World");6 Assertions.assertThat(optional).isPresent();7 Assertions.assertThat(optional).isPresent().contains("Hello World").contains("Hello");8 }9}10org.assertj.core.api.Assertions.assertThat(AbstractOptionalAssert.java:37)11org.assertj.core.api.Assertions.assertThat(AbstractOptionalAssert.java:30)12AssertJOptionalExample.main(AssertJOptionalExample.java:9)13java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)14java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)15java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)16java.base/java.lang.reflect.Method.invoke(Method.java:566)17org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)18org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)19org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)20org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)21org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)22org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)23org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)24org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)25org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)26org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)27org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)28org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)29org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)30org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)31org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210)32org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)

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1import org.assertj.core.api.Assertions;2import org.junit.Test;3import java.util.Optional;4public class OptionalTest {5 public void testOptional() {6 Optional<String> opt = Optional.of("abc");7 Assertions.assertThat(opt).isPresent();8 }9}

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1package org.example;2import java.util.Optional;3import org.assertj.core.api.Assertions;4public class Example1 {5 public static void main(String[] args) {6 Optional<String> optional = Optional.of("Value");7 Assertions.assertThat(optional).isPresent();8 }9}10org.example.Example1 > main() PASSED11package org.example;12import java.util.Optional;13import org.assertj.core.api.Assertions;14public class Example2 {15 public static void main(String[] args) {16 Optional<String> optional = Optional.empty();17 Assertions.assertThat(optional).isPresent();18 }19}20org.example.Example2 > main() FAILED21 at org.example.Example2.main(Example2.java:11)22package org.example;23import java.util.Optional;24import org.assertj.core.api.Assertions;25public class Example3 {26 public static void main(String[] args) {27 Optional<String> optional = Optional.of("Value");28 Assertions.assertThat(optional).isNotPresent();29 }30}31org.example.Example3 > main() FAILED32 at org.example.Example3.main(Example3.java:11)33package org.example;34import java.util.Optional;35import org.assertj.core.api.Assertions;36public class Example4 {37 public static void main(String[] args) {38 Optional<String> optional = Optional.empty();39 Assertions.assertThat(optional).isNotPresent();40 }41}42org.example.Example4 > main() PASSED

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1import static org.assertj.core.api.Assertions.assertThat;2import java.util.Optional;3public class AssertJAssertThatOptionalIsPresent {4 public static void main(String[] args) {5 Optional<String> opt = Optional.empty();6 assertThat(opt).as("Optional is empty").isNotPresent();7 opt = Optional.of("AssertJ");8 assertThat(opt).as("Optional is not empty").isPresent();9 }10}

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1import java.util.Optional;2import org.assertj.core.api.Assertions;3import org.junit.Test;4public class AssertJOptionalTest {5 public void whenCreateEmptyOptional_thenCorrect() {6 Optional<String> opt = Optional.empty();7 Assertions.assertThat(opt).isNotPresent();8 }9}10import java.util.Optional;11import org.assertj.core.api.Assertions;12import org.junit.Test;13public class AssertJOptionalTest {14 public void whenCreateOptionalWithNull_thenCorrect() {15 Optional<String> opt = Optional.ofNullable(null);16 Assertions.assertThat(opt).isNotPresent();17 }18}19import java.util.Optional;20import org.assertj.core.api.Assertions;21import org.junit.Test;22public class AssertJOptionalTest {23 public void whenCreateOptionalWithValue_thenCorrect() {24 Optional<String> opt = Optional.of("value");25 Assertions.assertThat(opt).isPresent();26 }27}28import java.util.Optional;29import org.assertj.core.api.Assertions;30import org.junit.Test;31public class AssertJOptionalTest {32 public void whenCreateOptionalWithValue_thenCorrect() {33 Optional<String> opt = Optional.of("value");34 Assertions.assertThat(opt).isPresent();35 Assertions.assertThat(opt).contains("value");36 }37}38import java.util.Optional;39import org.assertj.core.api.Assertions;40import org.junit.Test;41public class AssertJOptionalTest {42 public void whenCreateOptionalWithValue_thenCorrect() {43 Optional<String> opt = Optional.of("value");44 Assertions.assertThat(opt).isPresent();45 Assertions.assertThat(opt).contains("value");46 Assertions.assertThat(opt.get()).isEqualTo("value");47 }48}

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1import java.util.Optional;2import org.assertj.core.api.AbstractOptionalAssert;3import org.assertj.core.api.Assertions;4import org.junit.Test;5public class AssertjOptionalExample {6 public void testOptional() {7 Optional<String> optional = Optional.of("test");8 AbstractOptionalAssert<?, ?> optionalAssert = Assertions.assertThat(optional);9 optionalAssert.isPresent();10 }11}12Related posts: AssertJ OptionalAssert isNotPresent() Method Example AssertJ OptionalAssert contains() Method Example Asser

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