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

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

Source:AbstractOptionalAssert.java

...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}...

checkNotNull

Using AI Code Generation

1assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");2assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");3assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");4assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");5assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");6assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");7assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");8assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");9assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");10assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");11assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");12assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");13assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");14assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");15assertThat(Optional.of("foo")).isPresent().get().isEqualTo("foo");16assertThat(Optional

checkNotNull

Using AI Code Generation

1Optional<String> optional = Optional.of("value");2assertThat(optional).isPresent().contains("value");3assertThat(optional).isPresent().contains("value").hasValueSatisfying(value -> assertThat(value).contains("value"));4assertThat(optional).isPresent().hasValueSatisfying(value -> assertThat(value).contains("value"));5Optional<String> optional = Optional.of("value");6assertThat(optional).isPresent().contains("value");7assertThat(optional).isPresent().contains("value").hasValueSatisfying(value -> assertThat(value).contains("value"));8assertThat(optional).isPresent().hasValueSatisfying(value -> assertThat(value).contains("value"));9Optional<String> optional = Optional.of("value");10assertThat(optional).isPresent().contains("value");11assertThat(optional).isPresent().contains("value").hasValueSatisfying(value -> assertThat(value).contains("value"));12assertThat(optional).isPresent().hasValueSatisfying(value -> assertThat(value).contains("value"));13Optional<String> optional = Optional.of("value");14assertThat(optional).isPresent().contains("value");15assertThat(optional).isPresent().contains("value").hasValueSatisfying(value -> assertThat(value).contains("value"));16assertThat(optional).isPresent().hasValueSatisfying(value -> assertThat(value).contains("value"));17Optional<String> optional = Optional.of("value");18assertThat(optional).isPresent().contains("value");19assertThat(optional).isPresent().contains("value").hasValueSatisfying(value -> assertThat(value).contains("value"));20assertThat(optional).isPresent().hasValueSatisfying(value -> assertThat(value).contains("value"));21Optional<String> optional = Optional.of("value");22assertThat(optional).isPresent().contains("value");23assertThat(optional).isPresent().contains("value").hasValueSatisfying(value -> assertThat(value).contains("value"));24assertThat(optional).isPresent().hasValueSatisfying(value -> assertThat(value).contains("value"));

checkNotNull

Using AI Code Generation

1import org.assertj.core.api.AbstractOptionalAssert;2import org.assertj.core.api.Assertions;3public class AssertjOptionalAssertNotNullExample {4    public static void main(String[] args) {5        AbstractOptionalAssert<?, ?> optionalAssert = Assertions.assertThat(Optional.of("Hello World"));6        optionalAssert.isNotNull();7    }8}9    at org.junit.Assert.fail(Assert.java:88)10    at org.junit.Assert.assertTrue(Assert.java:41)11    at org.junit.Assert.assertFalse(Assert.java:64)12    at org.assertj.core.api.AbstractBooleanAssert.isFalse(AbstractBooleanAssert.java:66)13    at org.assertj.core.api.AbstractOptionalAssert.isNotNull(AbstractOptionalAssert.java:88)14    at org.assertj.core.api.AbstractOptionalAssert.isNotNull(AbstractOptionalAssert.java:32)15    at AssertjOptionalAssertNotNullExample.main(AssertjOptionalAssertNotNullExample.java:12)

checkNotNull

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2public class OptionalExample {3    public static void main(String[] args) {4        Optional<String> opt = Optional.of("Hello World!");5        assertThat(opt).isNotEmpty();6        assertThat(opt).isPresent();7        assertThat(opt).isNotNull();8        assertThat(opt).isPresent().contains("Hello World!");9    }10}

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