How to use Extractors class of org.assertj.core.extractor package

Best Assertj code snippet using org.assertj.core.extractor.Extractors

Source:FieldsOrPropertiesExtractor_extract_Test.java

...13package org.assertj.core.groups;14import java.util.Arrays;15import java.util.List;16import org.assertj.core.api.Assertions;17import org.assertj.core.extractor.Extractors;18import org.assertj.core.test.Employee;19import org.assertj.core.test.Name;20import org.assertj.core.util.introspection.IntrospectionError;21import org.junit.jupiter.api.Test;22public class FieldsOrPropertiesExtractor_extract_Test {23    private Employee yoda;24    private Employee luke;25    private List<Employee> employees;26    @Test27    public void should_extract_field_values_in_absence_of_properties() {28        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("id"));29        Assertions.assertThat(extractedValues).containsOnly(1L, 2L);30    }31    @Test32    public void should_extract_null_valuesfor_null_property_values() {33        yoda.setName(null);34        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("name"));35        Assertions.assertThat(extractedValues).containsOnly(null, new Name("Luke", "Skywalker"));36    }37    @Test38    public void should_extract_null_values_for_null_nested_property_values() {39        yoda.setName(null);40        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("name.first"));41        Assertions.assertThat(extractedValues).containsOnly(null, "Luke");42    }43    @Test44    public void should_extract_null_valuesfor_null_field_values() {45        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("surname"));46        Assertions.assertThat(extractedValues).containsOnly(new Name("Master", "Jedi"), null);47    }48    @Test49    public void should_extract_null_values_for_null_nested_field_values() {50        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("surname.first"));51        Assertions.assertThat(extractedValues).containsOnly("Master", null);52    }53    @Test54    public void should_extract_property_values_when_no_public_field_match_given_name() {55        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("age"));56        Assertions.assertThat(extractedValues).containsOnly(800, 26);57    }58    @Test59    public void should_extract_pure_property_values() {60        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("adult"));61        Assertions.assertThat(extractedValues).containsOnly(true);62    }63    @Test64    public void should_throw_error_when_no_property_nor_public_field_match_given_name() {65        Assertions.assertThatExceptionOfType(IntrospectionError.class).isThrownBy(() -> extract(employees, byName("unknown")));66    }67    @Test68    public void should_throw_exception_when_given_name_is_null() {69        Assertions.assertThatIllegalArgumentException().isThrownBy(() -> extract(employees, byName(((String) (null))))).withMessage("The name of the field/property to read should not be null");70    }71    @Test72    public void should_throw_exception_when_given_name_is_empty() {73        Assertions.assertThatIllegalArgumentException().isThrownBy(() -> extract(employees, byName(""))).withMessage("The name of the field/property to read should not be empty");74    }75    @Test76    public void should_fallback_to_field_if_exception_has_been_thrown_on_property_access() {77        List<Employee> employees = Arrays.<Employee>asList(new FieldsOrPropertiesExtractor_extract_Test.EmployeeWithBrokenName("Name"));78        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("name"));79        Assertions.assertThat(extractedValues).containsOnly(new Name("Name"));80    }81    @Test82    public void should_prefer_properties_over_fields() {83        List<Employee> employees = Arrays.<Employee>asList(new FieldsOrPropertiesExtractor_extract_Test.EmployeeWithOverriddenName("Overridden Name"));84        List<Object> extractedValues = FieldsOrPropertiesExtractor.extract(employees, Extractors.byName("name"));85        Assertions.assertThat(extractedValues).containsOnly(new Name("Overridden Name"));86    }87    @Test88    public void should_throw_exception_if_property_cannot_be_extracted_due_to_runtime_exception_during_property_access() {89        Assertions.assertThatExceptionOfType(IntrospectionError.class).isThrownBy(() -> {90            List<Employee> employees = Arrays.<Employee>asList(new org.assertj.core.groups.BrokenEmployee());91            extract(employees, byName("adult"));92        });93    }94    public static class EmployeeWithBrokenName extends Employee {95        public EmployeeWithBrokenName(String name) {96            super(1L, new Name(name), 0);97        }98        @Override...

Source:ByNameMultipleExtractor.java

...25  public Tuple extract(T input) {26    checkArgument(fieldsOrProperties != null, "The names of the fields/properties to read should not be null");27    checkArgument(fieldsOrProperties.length > 0, "The names of the fields/properties to read should not be empty");28    checkArgument(input != null, "The object to extract fields/properties from should not be null");29    List<Extractor<T, Object>> extractors = buildExtractors();30    List<Object> values = extractValues(input, extractors);31    32    return new Tuple(values.toArray());33  }34  private List<Object> extractValues(T input, List<Extractor<T, Object>> singleExtractors) {35    List<Object> values = new ArrayList<>();36    37    for (Extractor<T, Object> extractor : singleExtractors) {38      values.add(extractor.extract(input));39    }40    return values;41  }42  private List<Extractor<T, Object>> buildExtractors() {43    List<Extractor<T, Object>> result = new ArrayList<>();44    45    for (String name : fieldsOrProperties) {46      result.add(new ByNameSingleExtractor<T>(name));47    }48    49    return result;50  }51}...

Extractors

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.extractor.Extractors.byName;3import static org.assertj.core.extractor.Extractors.byNameStartingWith;4import static org.assertj.core.extractor.Extractors.byNameMatching;5import static org.assertj.core.extractor.Extractors.byNameContaining;6import static org.assertj.core.extractor.Extractors.byNameEndingWith;7import static org.assertj.core.extractor.Extractors.byNameNotMatching;8import static org.assertj.core.extractor.Extractors.byNameNotContaining;9import static org.assertj.core.extractor.Extractors.byNameNotStartingWith;10import static org.assertj.core.extractor.Extractors.byNameNotEndingWith;11import static org.assertj.core.extractor.Extractors.byNameNot;12import static org.assertj.core.extractor.Extractors.byNameNotIn;13import java.util.ArrayList;14import java.util.List;15import org.assertj.core.api.Condition;16import org.junit.Test;17public class ExtractorsTest {18    public void test1() {19        List<Person> persons = new ArrayList<>();20        persons.add(new Person("John", "Doe"));21        persons.add(new Person("Jane", "Doe"));22        persons.add(new Person("John", "Smith"));23        assertThat(persons).extracting("firstName").contains("John");24    }25    public void test2() {26        List<Person> persons = new ArrayList<>();27        persons.add(new Person("John", "Doe"));28        persons.add(new Person("Jane", "Doe"));29        persons.add(new Person("John", "Smith"));30        assertThat(persons).extracting("firstName").contains("John");31    }32    public void test3() {33        List<Person> persons = new ArrayList<>();34        persons.add(new Person("John", "Doe"));35        persons.add(new Person("Jane", "Doe"));36        persons.add(new Person("John", "Smith"));37        assertThat(persons).extracting("firstName").contains("John");38    }39    public void test4() {40        List<Person> persons = new ArrayList<>();41        persons.add(new Person("John", "Doe"));42        persons.add(new Person("Jane", "Doe"));43        persons.add(new Person("John", "Smith"));44        assertThat(persons).extracting("firstName").contains("John");45    }46    public void test6() {

Extractors

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.api.ListAssert;3import org.assertj.core.api.MapAssert;4import org.assertj.core.api.ObjectAssert;5import org.assertj.core.api.SoftAssertions;6import org.assertj.core.extractor.Extractors;7import org.junit.Test;8import static org.assertj.core.api.Assertions.assertThat;9public class ExtractorsTest {10    public void test() {11        Employee employee = new Employee("John", "Smith", 25);12        Employee employee2 = new Employee("John", "Smith", 25);13        Employee employee3 = new Employee("John", "Smith", 25);14        ListAssert<Employee> employeeListAssert = assertThat(Arrays.asList(employee, employee2, employee3));15        employeeListAssert.extracting(Extractors.byName("firstName")).containsExactly("John", "John", "John");16        employeeListAssert.extracting(Extractors.byName("lastName")).containsExactly("Smith", "Smith", "Smith");17        employeeListAssert.extracting(Extractors.byName("age")).containsExactly(25, 25, 25);18        MapAssert<String, Employee> employeeMapAssert = assertThat(19                new HashMap<String, Employee>() {{20                    put("employee1", employee);21                    put("employee2", employee2);22                    put("employee3", employee3);23                }}24        );25        employeeMapAssert.extracting(Extractors.byName("firstName")).containsExactly("John", "John", "John");26        employeeMapAssert.extracting(Extractors.byName("lastName")).containsExactly("Smith", "Smith", "Smith");27        employeeMapAssert.extracting(Extractors.byName("age")).containsExactly(25, 25, 25);28        ObjectAssert<Employee> employeeObjectAssert = assertThat(employee);29        employeeObjectAssert.extracting(Extractors.byName("firstName")).isEqualTo("John");30        employeeObjectAssert.extracting(Extractors.byName("lastName")).isEqualTo("Smith");31        employeeObjectAssert.extracting(Extractors.byName("age")).isEqualTo(25);32    }33}

Extractors

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.extractor.Extractors.byName;3import static org.assertj.core.extractor.Extractors.byNameStartingWith;4import static org.assertj.core.extractor.Extractors.byNameMatching;5import static org.assertj.core.extractor.Extractors.byNameContaining;6import static org.assertj.core.extractor.Extractors.byNameEndingWith;7import static org.assertj.core.extractor.Extractors.byNameNotMatching;8import static org.assertj.core.extractor.Extractors.byNameNotContaining;9import static org.assertj.core.extractor.Extractors.byNameNotStartingWith;10import static org.assertj.core.extractor.Extractors.byNameNotEndingWith;11import static org.assertj.core.extractor.Extractors.byNameNot;12import static org.assertj.core.extractor.Extractors.byNameNotIn;13import java.util.ArrayList;14import java.util.List;15import org.assertj.core.api.Condition;16import org.junit.Test;17public class ExtractorsTest {18    public void test1() {19        List<Person> persons = new ArrayList<>();20        persons.add(new Person("John", "Doe"));21        persons.add(new Person("Jane", "Doe"));22        persons.add(new Person("John", "Smith"));23        assertThat(persons).extracting("firstName").contains("John");24    }25    public void test2() {26        List<Person> persons = new ArrayList<>();27        persons.add(new Person("John", "Doe"));28        persons.add(new Person("Jane", "Doe"));29        persons.add(new Person("John", "Smith"));30        assertThat(persons).extracting("firstName").contains("John");31    }32    public void test3() {33        List<Person> persons = new ArrayList<>();34        persons.add(new Person("John", "Doe"));35        persons.add(new Person("Jane", "Doe"));36        persons.add(new Person("John", "Smith"));37        assertThat(persons).extracting("firstName").contains("John");38    }39    public void test4() {40        List<Person> persons = new ArrayList<>();41        persons.add(new Person("John", "Doe"));42        persons.add(new Person("Jane", "Doe"));43        persons.add(new Person("John", "Smith"));44        assertThat(persons).extracting("firstName").contains("John");45    }46    public void test5() {

Extractors

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.extractor.Extractors.byName;3import java.util.ArrayList;4import java.util.List;5import org.junit.Test;6public class ExtractorsTest {7    public void test() {8        List<Person> persons = new ArrayList<Person>();9        persons.add(new Person("John", 20));10        persons.add(new Person("Jane", 25));11        assertThat(persons).extracting("name").containsOnly("John", "Jane");12        assertThat(persons).extracting("age").containsOnly(20, 25);13        assertThat(persons).extracting(byName("name")).containsOnly("John", "Jane");14        assertThat(persons).extracting(byName("age")).containsOnly(20, 25);15    }16    private class Person {17        private String name;18        private int age;19        public Person(String name, int age) {20            this.name = name;21            this.age = age;22        }23        public String getName() {24            return name;25        }26        public int getAge() {27            return age;28        }29    }30}

Extractors

Using AI Code Generation

1import static org.assertj.core.api.Assertions.*;2import static org.assertj.core.extractor.Extractors.*;3import static org.assertj.core.util.Lists.*;4import java.util.*;5import org.assertj.core.api.*;6import org.assertj.core.extractor.*;7import org.assertj.core.util.*;8import org.junit.Test;9public class ExtractorsTest {10	public void testExtractors() {11		List<Person> persons = newArrayList(new Person("John", 30), new Person("Jane", 25));12		List<Integer> ages = extract(persons, age());13		List<String> names = extract(persons, name());14		List<String> names1 = extract(persons, name(), String.class);15		List<Integer> ages1 = extract(persons, age(), Integer.class);16		List<String> ages2 = extract(persons, age(), String.class);17		List<Object> ages3 = extract(persons, age(), Object.class);18		List<Person> ages4 = extract(persons, age(), Person.class);19	}20}

Extractors

Using AI Code Generation

1import static org.assertj.core.api.Assertions.*;2import static org.assertj.core.extractor.Extractors.*;3import static org.assertj.core.util.Lists.*;4import java.util.*;5import org.assertj.core.api.*;6import org.assertj.core.extractor.*;7import org.assertj.core.util.*;8import org.junit.Test;9public class ExtractorsTest {10	public void testExtractors() {11		List<Person> persons = newArrayList(new Person("John", 30), new Person("Jane", 25));12		List<Integer> ages = extract(persons, age());13		List<String> names = extract(persons, name());14		List<String> names1 = extract(persons, name(), String.class);15		List<Integer> ages1 = extract(persons, age(), Integer.class);16		List<String> ages2 = extract(persons, age(), String.class);17		List<Object> ages3 = extract(persons, age(), Object.class);18		List<Person> ages4 = extract(persons, age(), Person.class);19	}20}

Extractors

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.extractor.Extractors;3public class ExtractorsTest {4    public static void main(String[] args) {5        Person person = new Person("John", 35);6        Assertions.assertThat(person).extracting(Extractors.byName("name")).isEqualTo("John");7        Assertions.assertThat(person).extracting(Extractors.byName("age")).isEqualTo(35);8    }9}

Extractors

Using AI Code Generation

1package org.assertj.core.extractor;2import org.junit.Test;3import org.assertj.core.api.Assertions;4import org.assertj.core.api.ListAssert;5import org.assertj.core.api.ListAssertBaseTest;6import java.util.List;7import static org.assertj.core.api.Assertions.assertThat;8public class ExtractorsTest {9    public void test_withExtractors() {10        List<Employee> employees = Employee.getEmployees();11        ListAssert<Employee> listAssert =e ssertions.aExtractot(employees);12        ListAssert<Employee> listAssert1 = listAsserr.extracting(Extractors.byName("name"));13        assertThat(listAssert1).isNotNull();14    }15}16package org.assertj.core.extractor;17import java.util.Arrays;18import java.util.List;19public class Employee {20    private String name;21    private int age;22    public Employee(String name, int age) {23        this.name = name;24        this.age = age;25    }26    public static List<Employee> getEmployees() {27        return Arrays.asList(new Employee("John", 30), new Employee("Bob", 40), new Employee("Alice", 50));28    }29    public String getName() {30        return name;31    }32    public int getAge() {33        return age;34    }35}36package org.assertj.core.extractor;37import java.util.List;38public interface Extractor<T, U> {39    U extract(T input);40    default Extractor<T, List<U>> asExtractorForList() {41        return new Extractor<T, List<U>>() {42            public List<U> extract(T input) {43                return Arrays.asList(Extractor.this.extract(input));44            }45        };46    }47}48package org.assertj.core.extractor;49import java.util.List;50public interface Extractors {51    static <T, U> Extractor<T, U> byName(String name) {52        return new Extractor<T, U>() {53            public U extract(T input) {54                try {55                    return (U) input.getClass().getMethod(name).invoke(input);56                } catch (Exception e) {57                    throw new RuntimeException(e);58                }59            }60        };61    }62}63import org.assertj.core.api.Assertions;64import org.assertj.core.extractor.Extractors;65public class ExtractorsTest {66    public static void main(String[] args) {67        Person person = new Person("John", 35);68        Assertions.assertThat(person).extracting(Extractors.byName("name")).isEqualTo("John");69        Assertions.assertThat(person).extracting(Extractors.byName("age")).isEqualTo(35);70    }71}72import org.assertj.core.api.Assertions;73import org.junit.Test;74import java.util.List;75import java.util.ArrayList;76import java.util.Map;77import java.util.HashMap;78public class ExtractorsTest {79    public void testExtractors() {80        List<Map<String, String>> list = new ArrayList<>();81        Map<String, String> map = new HashMap<>();82        map.put("key1", "value1");83        map.put("key2", "value2");84        list.add(map);85        List<String> extractedList = Assertions.extractProperty("key1", String.class).from(list);86        Assertions.assertThat(extractedList).contains("value1");87    }88}89   at org.junit.Assert.assertEquals(Assert.java:115)90   at org.junit.Assert.assertEquals(Assert.java:144)91   at ExtractorsTest.testExtractors(ExtractorsTest.java:21)

Extractors

Using AI Code Generation

1import org.assertj.core.api.Assertions;2import org.assertj.core.extractor.Extractors;3public class ExtractorsTest {4    public static void main(String[] args) {5        Person person = new Person("John", 35);6        Assertions.assertThat(person).extracting(Extractors.byName("name")).isEqualTo("John");7        Assertions.assertThat(person).extracting(Extractors.byName("age")).isEqualTo(35);8    }9}10import org.assertj.core.api.Assertions;11import org.assertj.core.extractor.Extractors;12public class ExtractorsTest {13    public static void main(String[] args) {14        Person person = new Person("John", 35);15        Assertions.assertThat(person).extracting(Extractors.byName("name")).isEqualTo("John");16        Assertions.assertThat(person).extracting(Extractors.byName("age")).isEqualTo(35);17    }18}

Extractors

Using AI Code Generation

1public class ExtractorsUse {2    public static void main(String[] args) {3        List<Employee> employees = Arrays.asList(4                new Employee("John", "Doe", 30, 5000),5                new Employee("Jane", "Doe", 25, 6000),6                new Employee("Jack", "Bauer", 40, 7000),7                new Employee("Chloe", "O'Brian", 35, 4000),8                new Employee("Kim", "Bauer", 22, 9000),9                new Employee("David", "Palmer", 33, 10000),10                new Employee("Michelle", "Dessler", 36, 8000)11        );12        List<String> firstNames = Extractors.extract(employees, on(Employee.class).getFirstName());13        System.out.println(firstNames);14    }15}16import static org.assertj.core.extractor.Extractors.*;17import static org.assertj.core.api.Assertions.*;18import java.util.*;19import java.util.stream.*;20import java.util.function.*;21import java.util.function.*;22import java.util.stream.*;

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