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How to use internalExtracting method of org.assertj.core.api.AbstractIterableAssert class

Best Assertj code snippet using org.assertj.core.api.AbstractIterableAssert.internalExtracting

Source:AbstractIterableAssert.java

...1298   * @return a new assertion object whose object under test is the list of values extracted1299   */1300  @CheckReturnValue1301  public <V> AbstractListAssert<?, List<? extends V>, V, ObjectAssert<V>> extracting(Function<? super ELEMENT, V> extractor) {1302    return internalExtracting(extractor);1303  }1304  private <V> AbstractListAssert<?, List<? extends V>, V, ObjectAssert<V>> internalExtracting(Function<? super ELEMENT, V> extractor) {1305    if (actual == null) throwAssertionError(shouldNotBeNull());1306    List<V> values = FieldsOrPropertiesExtractor.extract(actual, extractor);1307    return newListAssertInstanceForMethodsChangingElementType(values);1308  }1309  /**1310   * Maps the Iterable's elements under test by applying a mapping function, the resulting list becomes the instance under test.1311   * <p>1312   * This allows to test values from the elements more safely than by using {@link #extracting(String)}.1313   * <p>1314   * Let's have a look at an example:1315   * <pre><code class='java'> // Build a list of TolkienCharacter, a TolkienCharacter has a name, and age and a Race (a specific class)1316   * List&lt;TolkienCharacter&gt; fellowshipOfTheRing = new ArrayList&lt;TolkienCharacter&gt;();1317   *1318   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Frodo&quot;, 33, HOBBIT));1319   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Sam&quot;, 38, HOBBIT));1320   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Gandalf&quot;, 2020, MAIA));1321   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Legolas&quot;, 1000, ELF));1322   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Pippin&quot;, 28, HOBBIT));1323   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Gimli&quot;, 139, DWARF));1324   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Aragorn&quot;, 87, MAN);1325   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Boromir&quot;, 37, MAN));1326   *1327   * // fellowship has hobbitses, right, my precioussss?1328   * assertThat(fellowshipOfTheRing).map(TolkienCharacter::getRace)1329   *                                .contains(HOBBIT);</code></pre>1330   *1331   * Note that the order of mapped values is consistent with the order of the Iterable under test, for example if1332   * it's a {@link HashSet}, you won't be able to make any assumptions on the extracted values order.1333   *1334   * @param <V> the type of elements resulting of the map operation.1335   * @param mapper the {@link Function} transforming input object to desired one1336   * @return a new assertion object whose object under test is the list of values extracted1337   * @since 3.19.01338   */1339  public <V> AbstractListAssert<?, List<? extends V>, V, ObjectAssert<V>> map(Function<? super ELEMENT, V> mapper) {1340    return internalExtracting(mapper);1341  }1342  /**1343   * Extract the values from Iterable's elements under test by applying an extracting function (which might throw an1344   * exception) on them. The returned iterable becomes the instance under test.1345   * <p>1346   * Any checked exception raised in the extractor is rethrown wrapped in a {@link RuntimeException}.1347   * <p>1348   * It allows to test values from the elements more safely than by using {@link #extracting(String)}, as it1349   * doesn't utilize introspection.1350   * <p>1351   * Let's have a look at an example:1352   * <pre><code class='java'> // Build a list of TolkienCharacter, a TolkienCharacter has a name, and age and a Race (a specific class)1353   * // they can be public field or properties, both can be extracted.1354   * List&lt;TolkienCharacter&gt; fellowshipOfTheRing = new ArrayList&lt;TolkienCharacter&gt;();1355   *1356   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Frodo&quot;, 33, HOBBIT));1357   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Sam&quot;, 38, HOBBIT));1358   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Gandalf&quot;, 2020, MAIA));1359   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Legolas&quot;, 1000, ELF));1360   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Pippin&quot;, 28, HOBBIT));1361   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Gimli&quot;, 139, DWARF));1362   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Aragorn&quot;, 87, MAN);1363   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Boromir&quot;, 37, MAN));1364   *1365   * assertThat(fellowshipOfTheRing).extracting(input -&gt; {1366   *   if (input.getAge() &lt; 20) {1367   *     throw new Exception("age &lt; 20");1368   *   }1369   *   return input.getName();1370   * }).contains("Frodo");</code></pre>1371   *1372   * Note that the order of extracted property/field values is consistent with the iteration order of the Iterable under1373   * test, for example if it's a {@link HashSet}, you won't be able to make any assumptions on the extracted values1374   * order.1375   *1376   * @param <EXCEPTION> the exception type of {@link ThrowingExtractor}1377   * @param <V> the type of elements extracted.1378   * @param extractor the object transforming input object to desired one1379   * @return a new assertion object whose object under test is the list of values extracted1380   * @since 3.7.01381   */1382  @CheckReturnValue1383  public <V, EXCEPTION extends Exception> AbstractListAssert<?, List<? extends V>, V, ObjectAssert<V>> extracting(ThrowingExtractor<? super ELEMENT, V, EXCEPTION> extractor) {1384    return internalExtracting(extractor);1385  }1386  /**1387   * Maps the Iterable's elements by applying the given mapping function (which might throw an exception), the returned list1388   * becomes the instance under test.1389   * <p>1390   * Any checked exception raised in the function is rethrown wrapped in a {@link RuntimeException}.1391   * <p>1392   * This allows to test values from the elements more safely than by using {@link #extracting(String)}.1393   * <p>1394   * Let's have a look at an example:1395   * <pre><code class='java'> // Build a list of TolkienCharacter, a TolkienCharacter has a name, and age and a Race (a specific class)1396   * List&lt;TolkienCharacter&gt; fellowshipOfTheRing = new ArrayList&lt;TolkienCharacter&gt;();1397   *1398   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Frodo&quot;, 33, HOBBIT));1399   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Sam&quot;, 38, HOBBIT));1400   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Gandalf&quot;, 2020, MAIA));1401   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Legolas&quot;, 1000, ELF));1402   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Pippin&quot;, 28, HOBBIT));1403   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Gimli&quot;, 139, DWARF));1404   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Aragorn&quot;, 87, MAN);1405   * fellowshipOfTheRing.add(new TolkienCharacter(&quot;Boromir&quot;, 37, MAN));1406   *1407   * assertThat(fellowshipOfTheRing).map(input -&gt; {1408   *   if (input.getAge() &lt; 20) {1409   *     throw new Exception("age &lt; 20");1410   *   }1411   *   return input.getName();1412   * }).contains("Frodo");</code></pre>1413   *1414   * Note that the order of mapped values is consistent with the order of the Iterable under test, for example if it's a1415   * {@link HashSet}, you won't be able to make any assumptions on the extracted values order.1416   *1417   * @param <EXCEPTION> the exception type of {@link ThrowingExtractor}1418   * @param <V> the type of elements extracted.1419   * @param mapper the function transforming input object to desired one1420   * @return a new assertion object whose object under test is the list of values extracted1421   * @since 3.19.01422   */1423  @CheckReturnValue1424  public <V, EXCEPTION extends Exception> AbstractListAssert<?, List<? extends V>, V, ObjectAssert<V>> map(ThrowingExtractor<? super ELEMENT, V, EXCEPTION> mapper) {1425    return internalExtracting(mapper);1426  }1427  /*1428   * Should be used after any methods changing the elements type like {@link #extracting(Function)} as it will propagate the1429   * correct assertions state, that is everything but the element comparator (since the element type has changed).1430   */1431  private <V> AbstractListAssert<?, List<? extends V>, V, ObjectAssert<V>> newListAssertInstanceForMethodsChangingElementType(List<V> values) {1432    if (actual instanceof SortedSet) {1433      // Reset the natural element comparator set when building an iterable assert instance for a SortedSet as it is likely not1434      // compatible with extracted values type, example with a SortedSet<Person> using a comparator on the Person's age, after1435      // extracting names we get a List<String> which is mot suitable for the age comparator1436      usingDefaultElementComparator();1437    }1438    return newListAssertInstance(values).withAssertionState(myself);1439  }...

internalExtracting

Using AI Code Generation

1    public static <ELEMENT, ITERABLE extends Iterable<? extends ELEMENT>> AbstractIterableAssert<?, ITERABLE, ELEMENT, ObjectAssert<ELEMENT>> internalExtracting(2            AbstractIterableAssert<?, ITERABLE, ELEMENT, ObjectAssert<ELEMENT>> self, Function<? super ELEMENT, ?> extractor) {3        return self.extracting(extractor);4    }5    public void test() {6        List<Person> persons = new ArrayList<>();7        Person person = new Person();8        person.setName("John");9        person.setAge(20);10        persons.add(person);11        person = new Person();12        person.setName("Mary");13        person.setAge(30);14        persons.add(person);15        person = new Person();16        person.setName("Tom");17        person.setAge(40);18        persons.add(person);19        assertThat(persons).extracting("name").contains("John");20        assertThat(persons).extracting("age").contains(40);21        assertThat(persons).extracting("name", "age").contains(tuple("John", 20));22        assertThat(persons).extracting("name", "age").contains(tuple("Mary", 30));23        assertThat(persons).extracting("name", "age").contains(tuple("Tom", 40));24    }25    public class Person {26        private String name;27        private int age;28        public String getName() {29            return name;30        }31        public void setName(String name) {32            this.name = name;33        }34        public int getAge() {35            return age;36        }37        public void setAge(int age) {38            this.age = age;39        }40    }41}

internalExtracting

Using AI Code Generation

1assertThat(Arrays.asList("1", "2", "3"))2    .extracting(new AbstractCharSequenceAssert.StringExtractor<Integer>() {3        public Integer apply(String input) {4            return Integer.parseInt(input);5        }6    })7    .containsExactly(1, 2, 3);8assertThat(Arrays.asList("1", "2", "3"))9    .extracting(new AbstractCharSequenceAssert.StringExtractor<Integer>() {10        public Integer apply(String input) {11            return Integer.parseInt(input);12        }13    })14    .containsExactly(1, 2, 3);15assertThat(Arrays.asList("1", "2", "3"))16    .extracting(new AbstractCharSequenceAssert.StringExtractor<Integer>() {17        public Integer apply(String input) {18            return Integer.parseInt(input);19        }20    })21    .containsExactly(1, 2, 3);22assertThat(Arrays.asList("1", "2", "3"))23    .extracting(new AbstractCharSequenceAssert.StringExtractor<Integer>() {24        public Integer apply(String input) {25            return Integer.parseInt(input);26        }27    })28    .containsExactly(1, 2, 3);29assertThat(Arrays.asList("1", "2", "3"))30    .extracting(new AbstractCharSequenceAssert.StringExtractor<Integer>() {31        public Integer apply(String input) {32            return Integer.parseInt(input);33        }34    })35    .containsExactly(1, 2, 3);36assertThat(Arrays.asList("1", "2", "3"))37    .extracting(new AbstractChar

internalExtracting

Using AI Code Generation

1assertThat(employees).extracting(Employee::getName).contains("John", "Jane", "Joe");2assertThat(employees).extracting(Employee::getName, e -> e.getDepartment().getName())3                     .contains(tuple("John", "IT"), tuple("Jane", "HR"), tuple("Joe", "IT"));4assertThat(employees).extracting("name", "department.name")5                     .contains(tuple("John", "IT"), tuple("Jane", "HR"), tuple("Joe", "IT"));6assertThat(employees).extracting("name", "department.name")7                     .contains(tuple("John", "IT"), tuple("Jane", "HR"), tuple("Joe", "IT"));8assertThat(employees).extracting("name", "department.name")9                     .contains(tuple("John", "IT"), tuple("Jane", "HR"), tuple("Joe", "IT"));10assertThat(employees).extracting("name", "department.name")11                     .contains(tuple("John", "IT"), tuple("Jane", "HR"), tuple("Joe", "IT"));

internalExtracting

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.api.AbstractIterableAssert;3import java.util.Arrays;4import java.util.List;5class AssertionsExample {6    public static void main(String[] args) {7        List<List<Object>> list = Arrays.asList(8                Arrays.asList("a", "b", "c"),9                Arrays.asList(1, 2, 3)10        );11        AbstractIterableAssert<?, Iterable<Object>, Object, Object> iterableAssert = Assertions.assertThat(list)12                .flatExtracting(Iterable::iterator);13        iterableAssert.containsExactly("a", "b", "c", 1, 2, 3);14    }15}16at org.junit.Assert.assertEquals(Assert.java:115)17at org.junit.Assert.assertEquals(Assert.java:144)18at org.assertj.core.api.AbstractIterableAssert.isEqualTo(AbstractIterableAssert.java:116)19at org.assertj.core.api.AbstractIterableAssert.isEqualTo(AbstractIterableAssert.java:25)20at org.assertj.core.api.AssertionsExample.main(AssertionsExample.java:21)

internalExtracting

Using AI Code Generation

1extracting("children.name").containsOnly(list("Sara", "Zoe"), list("Alex", "Jack", "Charlie"));2extracting("children.age").containsOnly(list(4, 6), list(2, 8, 10));3assertThat(employees).extracting("children.name").containsOnly(list("Sara", "Zoe"), list("Alex", "Jack", "Charlie"));4assertThat(employees).extracting("children.age").containsOnly(list(4, 6), list(2, 8, 10));5assertThat(employees).extracting("children.name").containsOnly(list("Sara", "Zoe"), list("Alex", "Jack", "Charlie"));6assertThat(employees).extracting("children.age").containsOnly(list(4, 6), list(2, 8, 10));7assertThat(employees).extracting("children.name").containsOnly(list("Sara", "Zoe"), list("Alex", "Jack", "Charlie"));8assertThat(employees).extracting("children.age").containsOnly(list(4, 6), list(2, 8, 10));9assertThat(employees).extracting("children.name").containsOnly(list("Sara", "Zoe"), list("Alex", "Jack", "Charlie"));10assertThat(employees).extracting("children.age").containsOnly(list(4, 6), list(2, 8, 10));11assertThat(employees).extracting("children.name").containsOnly(list("Sara", "Zoe"), list("Alex", "Jack", "Charlie"));12assertThat(employees).extracting("children.age").containsOnly(list(4, 6), list(2, 8, 10));13assertThat(employees).extracting("children.name").containsOnly(list("Sara", "Zoe"), list("Alex", "Jack", "Charlie"));14assertThat(employees).extracting("children.age").containsOnly(list(4, 6), list(2, 8, 10));15assertThat(employees).extracting("children.name").containsOnly(list("Sara", "Zoe"),

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