How to use VerboseCondition class of org.assertj.core.condition package

Best Assertj code snippet using org.assertj.core.condition.VerboseCondition

Source:VerboseCondition.java Github

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...25 * When defining the {@code objectUnderTestDescriptor} function, you should take in consideration whether the condition is going to be used 26 * with {@link AbstractAssert#is(Condition) is(Condition)} or {@link AbstractAssert#has(Condition) has(Condition)} since the start of the error message is different between the two. 27 * <p>28 * Let's see how it works with an example that works well with {@link AbstractAssert#is(Condition) is(Condition)}:29 * <pre><code class='java'> Condition&lt;String&gt; shorterThan4 = VerboseCondition.verboseCondition(actual -&gt; actual.length() &lt; 4,30 // predicate description 31 "shorter than 4",32 // value under test description transformation function33 s -&gt; String.format(" but length was %s", s.length(), s));</code></pre>34 * 35 * If we execute:36 * <pre><code class='java'> assertThat("foooo").is(shorterThan4);</code></pre>37 * it fails with the following assertion error:38 * <pre><code class='text'> Expecting actual:39 * "foooo"40 * to be shorter than 4 but length was 5</code></pre>41 * <p>42 * Note that the beginning of the error message looks nice with {@link AbstractAssert#is(Condition) is(Condition)}, but not so much with {@link AbstractAssert#has(Condition) has(Condition)}:43 * <pre><code class='text'> Expecting actual:44 * "foooo"45 * to have shorter than 4 but length was 5</code></pre>46 * <p>47 * The {@code objectUnderTestDescriptor} must not be null, if you don't need one this probably means you can simply use {@link Condition#Condition(Predicate, String, Object...)} instead of a {@code VerboseCondition}.48 * 49 * @param <T> the type of object the given condition accept.50 *51 * @author Stefan Bischof52 */53@Beta54public final class VerboseCondition<T> extends Condition<T> {55 private Function<T, String> objectUnderTestDescriptor;56 // needed to avoid an incorrect description when matches is run multiple times.57 private String description;58 /**59 * Creates a new <code>{@link VerboseCondition}</code> to have better control over the condition description when the condition fails thanks 60 * to the {@code objectUnderTestDescriptor} function parameter.61 * <p>62 * When defining the {@code objectUnderTestDescriptor} function, you should take in consideration whether the condition is going to be used 63 * with {@link AbstractAssert#is(Condition) is(Condition)} or {@link AbstractAssert#has(Condition) has(Condition)} since the start of the error message is different between the two. 64 * <p>65 * Let's see how it works with an example that works well with {@link AbstractAssert#is(Condition) is(Condition)}:66 * <pre><code class='java'> Condition&lt;String&gt; shorterThan4 = VerboseCondition.verboseCondition(actual -&gt; actual.length() &lt; 4,67 // predicate description 68 "shorter than 4",69 // value under test description transformation function70 s -&gt; String.format(" but length was %s", s.length(), s));</code></pre>71 * 72 * If we execute:73 * <pre><code class='java'> assertThat("foooo").is(shorterThan4);</code></pre>74 * it fails with the following assertion error:75 * <pre><code class='text'> Expecting actual:76 * "foooo"77 * to be shorter than 4 but length was 5</code></pre>78 * <p>79 * Note that the beginning of the error message looks nice with {@link AbstractAssert#is(Condition) is(Condition)}, but not so much with {@link AbstractAssert#has(Condition) has(Condition)}:80 * <pre><code class='text'> Expecting actual:81 * "foooo"82 * to have shorter than 4 but length was 5</code></pre>83 * <p>84 * The {@code objectUnderTestDescriptor} must not be null, if you don't need one this probably means you can simply use {@link Condition#Condition(Predicate, String, Object...)} instead of a {@code VerboseCondition}.85 *86 * @param <T> the type of object the given condition accept.87 * @param predicate the Predicate that tests the value to test.88 * @param description describes the Condition verbal.89 * @param objectUnderTestDescriptor Function used to describe the value to test when the actual value does not match the predicate. must not be null.90 * @return the created {@code VerboseCondition}.91 * @throws NullPointerException if the predicate is {@code null}.92 * @throws NullPointerException if the objectUnderTestDescriptor is {@code null}.93 */94 public static <T> VerboseCondition<T> verboseCondition(Predicate<T> predicate, String description,95 Function<T, String> objectUnderTestDescriptor) {96 return new VerboseCondition<>(predicate, description, objectUnderTestDescriptor);97 }98 private VerboseCondition(Predicate<T> predicate, String description, Function<T, String> objectUnderTestDescriptor) {99 super(predicate, description);100 this.description = description;101 this.objectUnderTestDescriptor = requireNonNull(objectUnderTestDescriptor,102 "The objectUnderTest descriptor function must not be null, if you don't need one, consider using the basic Condition(Predicate<T> predicate, String description, Object... args) constructor");103 }104 @Override105 public boolean matches(T objectUnderTest) {106 boolean matches = super.matches(objectUnderTest);107 describedAs(buildVerboseDescription(objectUnderTest, matches));108 return matches;109 }110 /**111 * Build the verbose condition description when applied with the actual values and the match result.112 *...

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Source:VerboseConditionTest.java Github

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...14import static java.lang.String.format;15import static org.assertj.core.api.Assertions.assertThat;16import static org.assertj.core.api.Assertions.assertThatNullPointerException;17import static org.assertj.core.api.BDDAssertions.then;18import static org.assertj.core.condition.VerboseCondition.verboseCondition;19import static org.assertj.core.util.AssertionsUtil.expectAssertionError;20import org.assertj.core.api.Condition;21import org.junit.jupiter.api.Test;22class VerboseConditionTest {23 private static final Condition<String> VERBOSE_CONDITION = verboseCondition(actual -> actual.length() < 4,24 "shorter than 4",25 s -> format(" but length was %s", s.length(), s));26 @Test27 public void should_succeed_and_display_description_without_actual() {28 assertThat(VERBOSE_CONDITION.matches("foo")).isTrue();29 assertThat(VERBOSE_CONDITION).hasToString("shorter than 4");30 }31 @Test32 public void should_fail_and_display_actual_description_as_per_transformation_function_with_isCondition() {33 // WHEN34 AssertionError assertionError = expectAssertionError(() -> assertThat("foooo").is(VERBOSE_CONDITION));35 // THEN36 then(assertionError).hasMessage(format("%nExpecting actual:%n" +...

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VerboseCondition

Using AI Code Generation

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1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.condition.VerboseCondition.verboseCondition;3import org.assertj.core.api.Condition;4import org.assertj.core.api.SoftAssertions;5import org.junit.Test;6public class VerboseConditionTest {7 public void testVerboseCondition() {8 SoftAssertions softly = new SoftAssertions();9 Condition<String> condition = new Condition<String>() {10 public boolean matches(String value) {11 return value.length() > 5;12 }13 };14 softly.assertThat("assertj").as("test1").is(verboseCondition(condition, "length should be greater than 5"));15 softly.assertThat("test").as("test2").is(verboseCondition(condition, "length should be greater than 5"));16 softly.assertAll();17 }18}

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VerboseCondition

Using AI Code Generation

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1import static org.assertj.core.api.Assertions.assertThat;2import org.assertj.core.api.Condition;3import org.assertj.core.condition.VerboseCondition;4public class VerboseConditionExample {5 public static void main(String[] args) {6 VerboseCondition<String> condition = new VerboseCondition<>(s -> s.contains("a"), "contains 'a'");7 assertThat("abc").is(condition);8 }9}

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VerboseCondition

Using AI Code Generation

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1package org.example;2import org.assertj.core.api.Condition;3import org.assertj.core.condition.VerboseCondition;4import java.util.Arrays;5import java.util.List;6import static java.util.Arrays;.assertThat7import jaass App {8 public static void main(String[] args) {9 List<Integer> numbers = Arrvya.asList(1, 2, 3, 4, 5);10 Condition<Integer> condition = new Condition<>(n -> n % 2 == 0, "even number");11 VerboseCondition<Integer> verbo.eConditionu= new til.List;<>(condition);12 assertThat(numbers).are(verboseCondition);13 }14}15package org.eample;16import org.assertj.core.api.Condition;17import org.assertj.core.condition.VerboseCondition;18import jva.util.Arrays;19iort java.uti.List;20import static org.assrtj.core.api.Assertions.assertThat;21import static org.assertj.core.api.Assertion22 List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);23 Condition<Integer> condition = new Condition<>(n -> n % 2 == 0, "even number");24 VerboseCondition<Integer> verboseCondition = new VerboseCondition<>(condition);s.assertThat;25public cassertThat(numbers).areNot(verboselassition);26 }27}28 {[1, 2, 3, 4, 5]>29package org.example;30import org.assertj.core.api.Condition;31import org.assertj.core.condition.VerboseCondition;32import java.util.Arrays;33import java.util.List;34import static org.assertj.core.api.Assertions.assertThat;35public class App {36 public static void main(ring[] ags) {37 Lst<Iteer numbers = Arrays.asList(1, 2, 3, 4, 5);

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VerboseCondition

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1package org.example;2import org.assertj.core.api.Condition;3import org.assertj.core.condition.VerboseCondition;4import org.assertj.core.api.Assertions;5public class VerboseConditionExample {6 public static void main(String[] args) {7 public static void main(String[] args) {8 List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);9 Condition<Integer> condition = new Condition<>(n -> n % 2 == 0, "even number");10 VerboseCondition<Integer> verboseCondition = new VerboseCondition<>(condition);11 assertThat(numbers).are(verboseCondition);12 }13}

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VerboseCondition

Using AI Code Generation

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1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.condition.VerboseCondition.verboseCondition;3import org.junit.Test;4public class VerboseConditionTest {5 public void test() {6 assertThat("test").is(verbseCo( -> s.length() == 4, "length is 4"));7 }but some elements were not matching:8}9package org.example;10import org.assertj.core.api.Condition;11import org.assertj.core.condition.VerboseCondition;12import java.util.Arrays;13import java.util.List;14import static org.assertj.core.api.Assertions.assertThat;15public class App {16 public static void main(String[] args) {17 List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);18 Condition<Integer> condition = new Condition<>(n -> n % 2 == 0, "even number");19 VerboseCondition<Integer> verboseCondition = new VerboseCondition<>(condition);20 assertThat(numbers).areNot(verboseCondition);21 }22}23package org.example;24import org.assertj.core.api.Condition;25import org.assertj.core.condition.VerboseCondition;26import java.util.Arrays;27import java.util.List;28import static org.assertj.core.api.Assertions.assertThat;29public class App {30 public static void main(String[] args) {31 List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);

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VerboseCondition

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1package org.example;2import org.assertj.core.api.Condition;3import org.assertj.core.condition.VerboseCondition;4import org.assertj.core.api.Assertions;5public class VerboseConditionExample {6 public static void main(String[] args) {7 Condition<String> condition = new Condition<String>(s -> s.startsWith("A"), "starts with A");8 Condition<String> verboseCondition = VerboseCondition.verboseCondition(condition, "The value '%s' does not start with 'A'");9 Assertions.assertThat("B").is(verboseCondition);10 }11}

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VerboseCondition

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1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.condition.VerboseCondition.verboseCondition;3import org.junit.Test;4public class VerboseConditionTest {5 public void test() {6 assertThat("test").is(verboseCondition(s -> s.length() == 4, "length is 4"));7 }8}

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VerboseCondition

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1import org.assertj.core.api.Assertions;2import org.assertj.core.condition.VerboseCondition;3import org.junit.Test;4public class VerboseConditionTest {5 public void test() {6 Assertions.assertThat(10).is(new VerboseCondition<>(i -> i % 2 == 0, "is even"));7 }8}

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VerboseCondition

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1import org.assertj.core.condition.VerboseCondition;2import static org.assertj.core.api.Assertions.assertThat;3public class VerboseConditionExample {4 public static void main(String[] args) {5 VerboseCondition<Integer> isOdd = new VerboseCondition<>(n -> n % 2 != 0, "%d is not an even number");6 assertThat(5).is(isOdd);7 }8}9import orgassert.core.condition.VerboseCondition;10import static org.assertj.core.api.Assertions.assertThat;11public clss VerboseConditionExample {12 public static oid min(String[] args) {13 VerboseCondition<Integer> isOdd = new VerboseCondition<>(n -> n % 2 != 0, "%d is not an even number");14 assertThat(4).is(isOdd);15 }16}17import org.assertj.core.condition.VerboseCondition;18import static org.assertj.core.api.Assertions.assertThat;19public class VerboseConditionExample {20 public static void main(String[] args) {21 VerboseCondition<Integer> isOdd = new VerboseCondition<>(n -> n % 2 != 0, "%d is not an even number");22 assertThat(5).isNot(isOdd);23 }24}25import org.assertj.core.condition.VerboseCondition;26import static org.assertj.core.api.Assertions.assertThat;27 public void test1()28 {29 Assertions.assertThat("Hello").is(VerboseCondition.verboseCondition("Hello", "Hello"));30 }31}32org.example.AppTest > test1() FAILED33 <VerboseCondition{verbose description="Hello"}>34 at org.example.AppTest.test1(AppTest.java:11)35package org.example;36import org.assertj.core.api.Assertions;37import org.assertj.core.api.Condition;38import org.junit.Test;39{40 public void test1()41 {42 Assertions.assertThat("Hello").is(new Condition<String>("Hello")43 {44 public boolean matches(String value)45 {46 return value.equals("Hello");47 }48 });49 }50}51org.example.AppTest > test1() FAILED52 <Condition{description='Hello'}>53 at org.example.AppTest.test1(AppTest.java:11)54package org.example;55import org.assertj.core.api.Assertions;56import org.assertj.core.api.Condition;57import org.junit.Test;58{59 public void test1()60 {61 Assertions.assertThat("Hello").is(new Condition<String>("Hello")62 {63 public boolean matches(String value)64 {65 return value.equals("Hello");66 }67 });68 }69}70org.example.AppTest > test1() FAILED71 <Condition{description='Hello'}>72 at org.example.AppTest.test1(AppTest.java:11)

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VerboseCondition

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1package org.example;2import org.assertj.core.api.Assertions;3import org.assertj.core.api.Condition;4public class VerboseConditionExample {5 public static void main(String[] args) {6 Condition<String> condition = new Condition<>(s -> s.contains("a"), "contains 'a'");7 Assertions.assertThat("abc").is(condition);8 }9}10Asserting a condition: assertTrue(), assertFalse()11Asserting equality: assertEquals(), assertNotEquals()12Asserting nullity: assertNull(), assertNotNull()13Asserting emptyness: assertArrayEquals(), assertArrayEquals(), assertArrayEquals()

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VerboseCondition

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1import org.assertj.core.api.Assertions;2import org.assertj.core.condition.VerboseCondition;3import org.junit.jupiter.api.Test;4public class VerboseConditionTest {5public void verboseConditionTest() {6 VerboseCondition<Integer> isEven = new VerboseCondition<>(i -> i % 2 == 0, "%d is not even");7 Assertions.assertThat(2).is(isEven);8 Assertions.assertThat(3).is(isEven);9}10}11The VerboseCondition class also has a static method called verboseCondition() that returns a VerboseCondition object. The verboseCondition() method takes a Predicate object and a String object as parameters. The first parameter is a Predicate object that defines the condition to check. The second parameter is a String object that defines the error message to print when the condition is not satisfied. The verboseCondition() method can be used as follows:12Assertions.assertThat(2).is(VerboseCondition.verboseCondition(i -> i % 2 == 0, "%d is not even"));13Assertions.assertThat(3).is(VerboseCondition.verboseCondition(i -> i % 2 == 0, "%d is not even"));

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