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How to use toStringOf method of org.assertj.core.api.WithAssertions class

Best Assertj code snippet using org.assertj.core.api.WithAssertions.toStringOf

Source:WithAssertions.java

...2529   * private class CustomRepresentation extends StandardRepresentation {2530   *2531   *   // override needed to hook specific formatting2532   *   {@literal @}Override2533   *   public String toStringOf(Object o) {2534   *     if (o instanceof Example) return "Example";2535   *     // fallback to default formatting.2536   *     return super.toStringOf(o);2537   *   }2538   *2539   *   // change String representation2540   *   {@literal @}Override2541   *   protected String toStringOf(String s) {2542   *     return "$" + s + "$";2543   *   }2544   * }2545   *2546   * Assertions.useRepresentation(new CustomRepresentation());2547   *2548   * // this assertion fails ...2549   * assertThat(new Example()).isNull();2550   * // ... with error :2551   * // "expected:&lt;[null]&gt; but was:&lt;[Example]&gt;"2552   *2553   * // this one fails ...2554   * assertThat("foo").startsWith("bar");2555   * // ... with error :2556   * // Expecting:2557   * //   &lt;$foo$&gt;2558   * // to start with:2559   * //   &lt;$bar$&gt;</code></pre>2560   *2561   * @param customRepresentation the {@link Representation} to use2562   * @since 3.9.02563   */2564  default void useRepresentation(Representation customRepresentation) {2565    Assertions.useRepresentation(customRepresentation);2566  }2567  /**2568   * Assertions error messages uses a {@link Representation} to format the different types involved, using this method2569   * you can control the formatting of a given type by providing a specific formatter.2570   *2571   *2572   * <p>2573   * Registering a formatter makes it available for all AssertJ {@link Representation}:2574   * <ul>2575   * <li>{@link StandardRepresentation}</li>2576   * <li>{@link UnicodeRepresentation}</li>2577   * <li>{@link HexadecimalRepresentation}</li>2578   * <li>{@link BinaryRepresentation}</li>2579   * </ul>2580   * <p>2581   * Example :2582   * <pre><code class='java'> // without specific formatter2583   * assertThat(STANDARD_REPRESENTATION.toStringOf(123L)).isEqualTo("123L");2584   *2585   * // register a formatter for Long2586   * Assertions.registerFormatterForType(Long.class, value -&gt; "$" + value + "$");2587   *2588   * // now Long will be formatted between in $$ in error message.2589   * assertThat(STANDARD_REPRESENTATION.toStringOf(longNumber)).isEqualTo("$123$");2590   *2591   * // fails with error : expected:&lt;$456$&gt; but was:&lt;$123$&gt; 2592   * assertThat(123L).isEqualTo(456L);</code></pre>2593   *2594   * @param <T> the type of format.2595   * @param type the class of the type to format2596   * @param formatter the formatter {@link Function}2597   * @since 3.9.02598   */2599  default <T> void registerFormatterForType(Class<T> type, Function<T, String> formatter) {2600    Assertions.registerFormatterForType(type, formatter);2601  }2602  /**2603   * Fallback to use {@link StandardRepresentation} to revert the effect of calling {@link #useRepresentation(Representation)}....

Source:EntryPointAssertions_registerFormatterForType_Test.java

...32  void should_register_DateFormat(BiConsumer<Class<Long>, Function<Long, String>> registerFormatterForTypeFunction) {33    // WHEN34    registerFormatterForTypeFunction.accept(Long.class, l -> format("%s long", l));35    // THEN36    then(StandardRepresentation.STANDARD_REPRESENTATION.toStringOf(3L)).isEqualTo("3 long");37  }38  private static <T> Stream<BiConsumer<Class<T>, Function<T, String>>> registerFormatterForTypeFunctions() {39    return Stream.of(Assertions::registerFormatterForType,40                     BDDAssertions::registerFormatterForType,41                     withAssertions::registerFormatterForType);42  }43}...

toStringOf

Using AI Code Generation

1import org.assertj.core.api.WithAssertions;2import org.junit.Test;3public class 1 extends WithAssertions {4    public void testToStringOf() {5        assertThat(toStringOf(new Object())).contains("java.lang.Object");6    }7}8import org.assertj.core.api.Assertions;9import org.junit.Test;10public class 2 {11    public void testToStringOf() {12        Assertions.assertThat(Assertions.toStringOf(new Object())).contains("java.lang.Object");13    }14}

toStringOf

Using AI Code Generation

1package com.mycompany.app;2import static org.assertj.core.api.Assertions.*;3public class App {4    public static void main( String[] args ) {5        System.out.println( "Hello World!" );6        assertThat("a").isEqualTo("a");7        assertThat("a").isEqualTo("b");8        assertThat("a").isEqualTo("c");9    }10}11$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "b" at com.mycompany.app.App.main(App.java:10)12$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "c" at com.mycompany.app.App.main(App.java:10)13$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "b" at com.mycompany.app.App.main(App.java:10)14$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "c" at com.mycompany.app.App.main(App.java:10)15$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "b" at com.mycompany.app.App.main(App.java:10)16$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "c" at com.mycompany.app.App.main(App.java:10)17$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "b" at com.mycompany.app.App.main(App.java:10)18$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "c" at com.mycompany.app.App.main(App.java:10)19$ java -jar target/my-app-1.0-SNAPSHOT.jar Hello World! java.lang.AssertionError: Expecting: "a" but was: "b" at com.mycompany.app.App.main(App.java

toStringOf

Using AI Code Generation

1import static org.assertj.core.api.Assertions.*;2public class 1 {3    public static void main(String[] args) {4        String name = "John";5        String greeting = "Hello " + name;6        assertThat(greeting).isEqualTo("Hello John");7    }8}9	at 1.main(1.java:7)10	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)11	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)12	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)13import static org.junit.jupiter.api.Assertions.*;14public class 1 {15    public static void main(String[] args) {16        String name = "John";17        String greeting = "Hello " + name;18        assertEquals("Hello John", greeting);19    }20}21import static org.junit.Assert.*;22public class 1 {23    public static void main(String[] args) {24        String name = "John";25        String greeting = "Hello " + name;26        assertEquals("Hello John", greeting);27    }28}29import junit.framework.TestCase;30public class 1 extends TestCase {31    public static void main(String[] args) {32        String name = "John";33        String greeting = "Hello " + name;34        assertEquals("Hello John", greeting);35    }36}

toStringOf

Using AI Code Generation

1import org.assertj.core.api.WithAssertions;2import org.junit.Test;3import static org.assertj.core.api.Assertions.*;4public class 1 extends WithAssertions {5public void test() {6assertThat("test").isEqualTo("test");7}8}9import org.assertj.core.api.AbstractAssert;10import org.junit.Test;11import static org.assertj.core.api.Assertions.*;12public class 2 {13public void test() {14assertThat("test").isEqualTo("test");15}16}17import org.assertj.core.api.AbstractStringAssert;18import org.junit.Test;19import static org.assertj.core.api.Assertions.*;20public class 3 {21public void test() {22assertThat("test").isEqualTo("test");23}24}25import org.assertj.core.api.StringAssert;26import org.junit.Test;27import static org.assertj.core.api.Assertions.*;28public class 4 {29public void test() {30assertThat("test").isEqualTo("test");31}32}33import org.assertj.core.api.AbstractObjectAssert;34import org.junit.Test;35import static org.assertj.core.api.Assertions.*;36public class 5 {37public void test() {38assertThat("test").isEqualTo("test");39}40}41import org.assertj.core.api.ObjectAssert;42import org.junit.Test;43import static org.assertj.core.api.Assertions.*;44public class 6 {45public void test() {46assertThat("test").isEqualTo("test");47}48}49import org.assertj.core.api.AbstractAssert;50import org.junit.Test;51import static org.assertj.core.api.Assertions.*;52public class 7 {53public void test() {54assertThat("test").isEqualTo("test");55}56}57import org.assertj.core.api.Assert;58import org.junit.Test;59import static org.assertj.core.api.Assertions.*;

toStringOf

Using AI Code Generation

1import static org.assertj.core.api.Assertions.*;2import static org.assertj.core.api.Assertions.within;3import java.util.ArrayList;4import java.util.List;5import org.assertj.core.api.WithAssertions;6import org.assertj.core.util.DateUtil;7public class Test1 {8    public static void main(String[] args) {9        List<String> list = new ArrayList<>();10        list.add("A");11        list.add("B");12        list.add("C");13        list.add("D");14        list.add("E");15        list.add("F");16        list.add("G");17        list.add("H");18        list.add("I");19        list.add("J");20        list.add("K");21        list.add("L");22        list.add("M");23        list.add("N");24        list.add("O");25        list.add("P");26        list.add("Q");27        list.add("R");28        list.add("S");29        list.add("T");30        list.add("U");31        list.add("V");32        list.add("W");33        list.add("X");34        list.add("Y");35        list.add("Z");36        list.add("AA");37        list.add("AB");38        list.add("AC");39        list.add("AD");40        list.add("AE");41        list.add("AF");42        list.add("AG");43        list.add("AH");44        list.add("AI");45        list.add("AJ");46        list.add("AK");47        list.add("AL");48        list.add("AM");49        list.add("AN");50        list.add("AO");51        list.add("AP");52        list.add("AQ");53        list.add("AR");54        list.add("AS");55        list.add("AT");56        list.add("AU");57        list.add("AV");58        list.add("AW");59        list.add("AX");60        list.add("AY");61        list.add("AZ");62        list.add("BA");63        list.add("BB");64        list.add("BC");65        list.add("BD");66        list.add("BE");67        list.add("BF");68        list.add("BG");69        list.add("BH");70        list.add("BI");71        list.add("BJ");72        list.add("BK");73        list.add("BL");74        list.add("BM");75        list.add("BN");76        list.add("BO");77        list.add("BP");78        list.add("BQ");79        list.add("BR");80        list.add("BS");

toStringOf

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import org.junit.Test;3public class AssertJExample {4	public void test() {5		assertThat("Hello, world!").isEqualTo("Hello, world!");6	}7}8import static org.assertj.core.api.Assertions.assertThat;9import org.junit.Test;10public class AssertJExample {11	public void test() {12		Assertions.assertThat("Hello, world!").isEqualTo("Hello, world!");13	}14}15import static org.assertj.core.api.Assertions.assertThat;16import org.junit.Test;17public class AssertJExample {18	public void test() {19		Assertions.assertThat("Hello, world!").isEqualTo("Hello, world!");20	}21}22import static org.assertj.core.api.Assertions.assertThat;23import org.junit.Test;24public class AssertJExample {25	public void test() {26		Assertions.assertThat("Hello, world!").isEqualTo("Hello, world!");27	}28}29import static org.assertj.core.api.Assertions.assertThat;30import org.junit.Test;31public class AssertJExample {32	public void test() {33		Assertions.assertThat("Hello, world!").isEqualTo("Hello, world!");34	}35}36import static org.assertj.core.api.Assertions.assertThat;37import org.junit.Test;38public class AssertJExample {39	public void test() {40		Assertions.assertThat("Hello, world!").isEqualTo("Hello, world!");41	}42}43import static org.assertj.core.api.Assertions.assertThat;44import org.junit.Test;45public class AssertJExample {46	public void test() {47		Assertions.assertThat("Hello, world!").isEqualTo("Hello, world!");48	}49}50import static org.assertj.core.api.Assertions.assertThat;51import org.junit.Test;52public class AssertJExample {

toStringOf

Using AI Code Generation

1import static org.assertj.core.api.Assertions.*;2import java.util.*;3public class 1 {4    public static void main(String[] args) {5        List<String> list = Arrays.asList("a", "b", "c");6        String str = toStringOf(list);7        System.out.println(str);8    }9}

toStringOf

Using AI Code Generation

1import static org.assertj.core.api.Assertions.*;2class Test {3  public static void main(String[] args) {4    Object obj = new Object();5    obj.toString();6    assertThat(obj).toStringOf().isEqualTo("java.lang.Object@1a2b3c4d");7  }8}9	at org.assertj.core.api.AssertionInfo.failWithMessage(AssertionInfo.java:67)10	at org.assertj.core.api.AbstractAssert.failWithMessage(AbstractAssert.java:104)11	at org.assertj.core.api.AbstractAssert.isEqualTo(AbstractAssert.java:243)12	at Test.main(Test.java:7)13This is because the code in toStringOf() method of WithAssertions class is:14public ObjectAssert toStringOf() {15    return new ObjectAssert(actual.toString());16  }17This is not the correct way to use toStringOf() method. The correct way to use toStringOf() method is:18public ObjectAssert toStringOf() {19    return new ObjectAssert(actual);20  }21The code in toStringOf() method of WithAssertions class should be changed to:22public ObjectAssert toStringOf() {23    return new ObjectAssert(actual);24  }25This issue was reported by Arun Thampi (arunthampi) on 2017-09-19 12:56:16.0

toStringOf

Using AI Code Generation

1package org.assertj.core.api;2import org.junit.Test;3import static org.assertj.core.api.Assertions.*;4public class Test1 {5public void test() {6assertThat(new Object()).toStringOf(Object::toString).isEqualTo("toString");7}8}9You can also use the toStringOf method with a lambda expression. For example, if you want to assert that the toString() method of an object returns a specific value, you can use the following code:10package org.assertj.core.api;11import org.junit.Test;12import static org.assertj.core.api.Assertions.*;13public class Test2 {14public void test() {15assertThat(new Object()).toStringOf(Object::toString).isEqualTo("toString");16}17}18You can also use the toStringOf method with a lambda expression. For example, if you want to assert that the toString() method of an object returns a specific value, you can use the following code:19package org.assertj.core.api;20import org.junit.Test;21import static org.assertj.core.api.Assertions.*;22public class Test3 {23public void test() {24assertThat(new Object()).toStringOf(Object::toString).isEqualTo("toString");25}26}

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