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

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

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...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 }...

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internalExtracting

Using AI Code Generation

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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}

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internalExtracting

Using AI Code Generation

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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

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internalExtracting

Using AI Code Generation

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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"));

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internalExtracting

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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)

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internalExtracting

Using AI Code Generation

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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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