How to use assertThatIterator method of org.assertj.core.api.Assertions class

Best Assertj code snippet using org.assertj.core.api.Assertions.assertThatIterator

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...11 * Copyright 2012-2022 the original author or authors.12 */​13package org.assertj.core.api;14import static java.util.Arrays.asList;15import static org.assertj.core.api.Assertions.assertThatIterator;16import static org.assertj.core.api.BDDAssertions.then;17import static org.assertj.core.util.AssertionsUtil.expectAssertionError;18import static org.assertj.core.util.Sets.newLinkedHashSet;19import static org.mockito.Mockito.mock;20import static org.mockito.Mockito.verifyNoInteractions;21import java.util.Iterator;22import org.junit.jupiter.api.Test;23class Assertions_assertThatIterator_Test {24 private final StringIterator stringIterator = new StringIterator();25 private static final class StringIterator implements Iterator<String> {26 @Override27 public boolean hasNext() {28 return true;29 }30 @Override31 public String next() {32 return "";33 }34 @Override35 public void remove() {}36 }37 @Test38 void should_create_Assert() {39 /​/​ GIVEN40 Iterable<Object> actual = newLinkedHashSet();41 /​/​ WHEN42 IteratorAssert<Object> iteratorAssert = assertThatIterator(actual.iterator());43 /​/​ THEN44 then(iteratorAssert).isNotNull();45 }46 @SuppressWarnings("unchecked")47 @Test48 void should_initialise_actual() {49 /​/​ GIVEN50 Iterator<String> names = asList("Luke", "Leia").iterator();51 /​/​ WHEN52 Iterator<String> actual = (Iterator<String>) assertThatIterator(names).actual;53 /​/​ THEN54 then(actual).hasNext();55 }56 @Test57 void should_allow_null() {58 then(assertThatIterator((Iterator<String>) null).actual).isNull();59 }60 @Test61 void isEqualTo_should_honor_comparing_the_same_mocked_iterator() {62 /​/​ GIVEN63 Iterator<?> iterator = mock(Iterator.class);64 /​/​ WHEN/​THEN65 assertThatIterator(iterator).isEqualTo(iterator);66 }67 @Test68 void should_not_consume_iterator_when_asserting_non_null() {69 /​/​ GIVEN70 Iterator<?> iterator = mock(Iterator.class);71 /​/​ WHEN72 assertThatIterator(iterator).isNotNull();73 /​/​ THEN74 verifyNoInteractions(iterator);75 }76 @Test77 void isInstanceOf_should_check_the_original_iterator_without_consuming_it() {78 /​/​ GIVEN79 Iterator<?> iterator = mock(Iterator.class);80 /​/​ WHEN81 assertThatIterator(iterator).isInstanceOf(Iterator.class);82 /​/​ THEN83 verifyNoInteractions(iterator);84 }85 @Test86 void isInstanceOfAny_should_check_the_original_iterator_without_consuming_it() {87 /​/​ GIVEN88 Iterator<?> iterator = mock(Iterator.class);89 /​/​ WHEN90 then(iterator).isInstanceOfAny(Iterator.class, String.class);91 /​/​ THEN92 verifyNoInteractions(iterator);93 }94 @Test95 void isOfAnyClassIn_should_check_the_original_iterator_without_consuming_it() {96 assertThatIterator(stringIterator).isOfAnyClassIn(Iterator.class, StringIterator.class);97 }98 @Test99 void isExactlyInstanceOf_should_check_the_original_iterator() {100 assertThatIterator(new StringIterator()).isExactlyInstanceOf(StringIterator.class);101 }102 @Test103 void isNotExactlyInstanceOf_should_check_the_original_iterator() {104 /​/​ WHEN105 assertThatIterator(stringIterator).isNotExactlyInstanceOf(Iterator.class);106 /​/​ THEN107 expectAssertionError(() -> then(stringIterator).isNotExactlyInstanceOf(StringIterator.class));108 }109 @Test110 void isNotInstanceOf_should_check_the_original_iterator() {111 assertThatIterator(stringIterator).isNotInstanceOf(Long.class);112 }113 @Test114 void isNotInstanceOfAny_should_check_the_original_iterator() {115 assertThatIterator(stringIterator).isNotInstanceOfAny(Long.class, String.class);116 }117 @Test118 void isNotOfAnyClassIn_should_check_the_original_iterator() {119 assertThatIterator(stringIterator).isNotOfAnyClassIn(Long.class, String.class);120 }121 @Test122 void isSameAs_should_check_the_original_iterator_without_consuming_it() {123 /​/​ GIVEN124 Iterator<?> iterator = mock(Iterator.class);125 /​/​ WHEN126 assertThatIterator(iterator).isSameAs(iterator);127 /​/​ THEN128 verifyNoInteractions(iterator);129 }130 @Test131 void isNotSameAs_should_check_the_original_iterator_without_consuming_it() {132 /​/​ GIVEN133 Iterator<?> iterator = mock(Iterator.class);134 /​/​ WHEN135 expectAssertionError(() -> assertThatIterator(iterator).isNotSameAs(iterator));136 /​/​ THEN137 verifyNoInteractions(iterator);138 }139 @Test140 void iterator_can_be_asserted_twice() {141 /​/​ GIVEN142 Iterator<String> names = asList("Luke", "Leia").iterator();143 /​/​ WHEN/​THEN144 assertThatIterator(names).hasNext().hasNext();145 }146}...

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...10 *11 * Copyright 2012-2022 the original author or authors.12 */​13package org.assertj.core.api.test;14import static org.assertj.core.api.Assertions.assertThatIterator;15import static org.assertj.core.api.AssertionsForClassTypes.assertThat;16import static org.assertj.core.api.PredicateAssert.assertThatPredicate;17import java.util.Iterator;18import java.util.function.Predicate;19import org.junit.jupiter.api.Test;20/​/​ not in org.assertj.core.api package to avoid resolving classes from it21class Assertions_solving_assertThat_ambiguous_Test {22 @Test23 void should_resolve_ambiguous_assertThat_for_interfaces_and_use_assertThat_for_classes() {24 /​/​ GIVEN25 IteratorPredicate<String> iteratorPredicate = new IteratorPredicate<>();26 /​/​ WHEN/​THEN27 assertThatPredicate(iteratorPredicate).rejects("foo");28 assertThatIterator(iteratorPredicate).isExhausted();29 /​/​ assertions from AssertionsForClassTypes.assertThat30 assertThat("").isEmpty();31 assertThat(2L).isPositive();32 }33 static class IteratorPredicate<T> implements Iterator<T>, Predicate<T> {34 @Override35 public boolean test(T t) {36 return false;37 }38 @Override39 public boolean hasNext() {40 return false;41 }42 @Override...

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assertThatIterator

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1import static org.assertj.core.api.Assertions.assertThatIterator;2import java.util.ArrayList;3import java.util.Iterator;4import java.util.List;5public class 1 {6 public static void main(String[] args) {7 List<Integer> list = new ArrayList<>();8 list.add(1);9 list.add(2);10 list.add(3);11 Iterator<Integer> iterator = list.iterator();12 assertThatIterator(iterator).containsExactly(1, 2, 3);13 }14}15to contain exactly (and in same order):16import static org.assertj.core.api.Assertions.assertThatIterator;17import java.util.ArrayList;18import java.util.Iterator;19import java.util.List;20public class 2 {21 public static void main(String[] args) {22 List<Integer> list = new ArrayList<>();23 list.add(1);24 list.add(2);25 list.add(3);26 Iterator<Integer> iterator = list.iterator();27 assertThatIterator(iterator).containsExactly(1, 2, 4);28 }29}30to contain exactly (and in same order):31import static org.assertj.core.api.Assertions.assertThatIterator;32import java.util.ArrayList;33import java.util.Iterator;34import java.util.List;35public class 3 {36 public static void main(String[] args) {37 List<Integer> list = new ArrayList<>();38 list.add(1);39 list.add(2);40 list.add(3);41 Iterator<Integer> iterator = list.iterator();42 assertThatIterator(iterator).containsExactly(1, 2, 3, 4

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assertThatIterator

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1import org.assertj.core.api.Assertions;2import java.util.ArrayList;3import java.util.Iterator;4import java.util.List;5public class 1 {6 public static void main(String[] args) {7 List<String> list = new ArrayList<>();8 list.add("A");9 list.add("B");10 list.add("C");11 list.add("D");12 list.add("E");13 Iterator<String> iterator = list.iterator();14 Assertions.assertThatIterator(iterator).containsExactly("A", "B", "C", "D", "E");15 }16}

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assertThatIterator

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1import org.junit.Test;2import java.util.Arrays;3import java.util.Iterator;4import java.util.List;5import static org.assertj.core.api.Assertions.assertThatIterator;6public class AssertThatIterator {7 public void testAssertThatIterator() {8 List<String> list = Arrays.asList("one", "two", "three");9 Iterator<String> iterator = list.iterator();10 assertThatIterator(iterator).containsExactly("one", "two", "three");11 }12}

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assertThatIterator

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1import org.assertj.core.api.Assertions;2import java.util.ArrayList;3import java.util.Iterator;4import java.util.List;5public class 1 {6 public static void main(String[] args) {7 List<String> list = new ArrayList<String>();8 list.add("one");9 list.add("two");10 list.add("three");11 Iterator<String> iter = list.iterator();12 Assertions.assertThatIterator(iter).containsExactly("one", "two", "three");13 }14}

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assertThatIterator

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1package org.example;2import java.util.Arrays;3import java.util.Iterator;4import java.util.List;5import org.assertj.core.api.Assertions;6public class App {7 public static void main(String[] args) {8 List<Integer> list = Arrays.asList(1, 2, 3, 4, 5);9 Iterator<Integer> iterator = list.iterator();10 Assertions.assertThatIterator(iterator)11 .toIterable()12 .containsExactly(1, 2, 3, 4, 5);13 }14}

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assertThatIterator

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1package org.example;2import java.util.Iterator;3import java.util.List;4import org.assertj.core.api.Assertions;5public class App {6 public static void main(String[] args) {7 List<String> list = List.of("one", "two", "three");8 Iterator<String> iterator = list.iterator();9 Assertions.assertThatIterator(iterator)10 .toIterable()11 .containsExactly("one", "two", "three");12 }13}

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assertThatIterator

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1import static org.assertj.core.api.Assertions.assertThatIterator;2import java.util.ArrayList;3import java.util.Iterator;4import java.util.List;5public class Test {6 public static void main(String[] args) {7 List<String> list = new ArrayList<String>();8 list.add("One");9 list.add("Two");10 list.add("Three");11 list.add("Four");12 list.add("Five");13 Iterator<String> itr = list.iterator();14 assertThatIterator(itr).containsSequence("One", "Two", "Three");15 System.out.println("The iterator contains the specified elements");16 }17}18Recommended Posts: Java | AssertJ - assertThatIterable() method19Java | AssertJ - assertThatCode() method20Java | AssertJ - assertThatObject() method21Java | AssertJ - assertThat() method22Java | AssertJ - assertThatExceptionOfType() method23Java | AssertJ - assertThatThrownBy() method24Java | AssertJ - assertThatIllegalArgumentException() method25Java | AssertJ - assertThatIllegalStateException() method26Java | AssertJ - assertThatNullPointerException() method27Java | AssertJ - assertThatArray() method28Java | AssertJ - assertThatBoolean() method29Java | AssertJ - assertThatDouble() method30Java | AssertJ - assertThatInteger() method31Java | AssertJ - assertThatLong() method32Java | AssertJ - assertThatShort() method33Java | AssertJ - assertThatString() method34Java | AssertJ - assertThatFile() method35Java | AssertJ - assertThatInputStream() method36Java | AssertJ - assertThatReader() method37Java | AssertJ - assertThatByteArray() method38Java | AssertJ - assertThatDoubleArray() method39Java | AssertJ - assertThatFloatArray() method40Java | AssertJ - assertThatIntArray() method41Java | AssertJ - assertThatLongArray() method42Java | AssertJ - assertThatShortArray() method43Java | AssertJ - assertThatMap() method44Java | AssertJ - assertThatList() method45Java | AssertJ - assertThatSet() method46Java | AssertJ - assertThatDate() method47Java | AssertJ - assertThatLocalDate() method48Java | AssertJ - assertThatLocalDateTime() method

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assertThatIterator

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1import static org.assertj.core.api.Assertions.assertThatIterator;2import java.util.Iterator;3import java.util.ArrayList;4import org.junit.Test;5public class Test1 {6 public void test() {7 Iterator<Integer> itr = new ArrayList<Integer>().iterator();8 assertThatIterator(itr).isEmpty();9 }10}11at org.assertj.core.internal.Iterables.assertEmpty(Iterables.java:159)12at org.assertj.core.api.AbstractIterableAssert.isEmpty(AbstractIterableAssert.java:144)13at Test1.test(Test1.java:10)

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1import org.assertj.core.api.Assertions;2import org.junit.Test;3import java.util.ArrayList;4import java.util.Iterator;5import java.util.List;6public class TestAssertThatIterator {7 public void test() {8 List<Integer> list = new ArrayList<>();9 list.add(1);10 list.add(2);11 list.add(3);12 Iterator<Integer> iterator = list.iterator();13 Assertions.assertThatIterator(iterator)14 .containsExactly(1, 2, 3);15 }16}17to contain exactly (and in same order):18at org.junit.Assert.assertEquals(Assert.java:115)19at org.junit.Assert.assertEquals(Assert.java:144)20at org.assertj.core.api.AbstractIterableAssert.isEqualTo(AbstractIterableAssert.java:226)21at org.assertj.core.api.AbstractIterableAssert.isEqualTo(AbstractIterableAssert.java:32)22at org.assertj.core.api.Assertions$AssertThatIterator.containsExactly(Assertions.java:2935)23at TestAssertThatIterator.test(TestAssertThatIterator.java:16)

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