Class IterableSubject
- Direct Known Subclasses:
IterableOfProtosSubject
,MultisetSubject
Iterable
values.
Note:
- Assertions may iterate through the given
Iterable
more than once. If you have an unusual implementation ofIterable
which does not support multiple iterations (sometimes known as a "one-shot iterable"), you must copy your iterable into a collection which does (e.g.ImmutableList.copyOf(iterable)
or, if your iterable may contain null,newArrayList(iterable)
). If you don't, you may see surprising failures. - Assertions may also require that the elements in the given
Iterable
implementObject.hashCode()
correctly.
- Author:
- Kurt Alfred Kluever, Pete Gillin
-
Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionstatic class
A partially specified check in which the actual elements (normally the elements of theIterable
under test) are compared to expected elements using aCorrespondence
.Nested classes/interfaces inherited from class com.google.common.truth.Subject
Subject.Factory<SubjectT extends Subject, ActualT>
-
Constructor Summary
ConstructorsModifierConstructorDescriptionprotected
IterableSubject
(FailureMetadata metadata, @Nullable Iterable<?> actual) Constructor for use by subclasses. -
Method Summary
Modifier and TypeMethodDescriptionprotected String
Supplies the direct string representation of the actual value to other methods which may prefix or otherwise position it in an error message.<A extends @Nullable Object, E extends @Nullable Object>
IterableSubject.UsingCorrespondence<A, E> comparingElementsUsing
(Correspondence<? super A, ? super E> correspondence) Starts a method chain for a check in which the actual elements (i.e. the elements of theIterable
under test) are compared to expected elements using the givenCorrespondence
.final void
Checks that the actual iterable contains the supplied item.final void
containsAnyIn
(@Nullable Iterable<?> expected) Checks that the actual iterable contains at least one of the objects contained in the provided collection.final void
containsAnyIn
(@Nullable Object[] expected) Checks that the actual iterable contains at least one of the objects contained in the provided array.final void
Checks that the actual iterable contains at least one of the provided objects.final Ordered
containsAtLeast
(@Nullable Object firstExpected, @Nullable Object secondExpected, @Nullable Object @Nullable ... restOfExpected) Checks that the actual iterable contains at least all the expected elements.final Ordered
containsAtLeastElementsIn
(@Nullable Iterable<?> expectedIterable) Checks that the actual iterable contains at least all the expected elements.final Ordered
containsAtLeastElementsIn
(@Nullable Object[] expected) Checks that the actual iterable contains at least all the expected elements.final Ordered
containsExactly
(@Nullable Object @Nullable ... expected) Checks that the actual iterable contains exactly the provided objects.final Ordered
containsExactlyElementsIn
(@Nullable Iterable<?> expected) Checks that the actual iterable contains exactly the provided objects.final Ordered
containsExactlyElementsIn
(@Nullable Object @Nullable [] expected) Checks that the actual iterable contains exactly the provided objects.final void
Checks that the actual iterable does not contain duplicate elements.final void
containsNoneIn
(@Nullable Iterable<?> excluded) Checks that the actual iterable contains none of the elements contained in the excluded iterable.final void
containsNoneIn
(@Nullable Object[] excluded) Checks that the actual iterable contains none of the elements contained in the excluded array.final void
containsNoneOf
(@Nullable Object firstExcluded, @Nullable Object secondExcluded, @Nullable Object @Nullable ... restOfExcluded) Checks that the actual iterable contains none of the excluded objects.final void
doesNotContain
(@Nullable Object element) Checks that the actual iterable does not contain the supplied item.<T extends @Nullable Object>
IterableSubject.UsingCorrespondence<T, T> formattingDiffsUsing
(Correspondence.DiffFormatter<? super T, ? super T> formatter) Starts a method chain for a check in which failure messages may use the givenCorrespondence.DiffFormatter
to describe the difference between an actual element (i.e. an element of theIterable
under test) and the element it is expected to be equal to, but isn't.final void
hasSize
(int expectedSize) Checks that the actual iterable has the given size.final void
isEmpty()
Checks that the actual iterable is empty.void
Checks that the value under test is equal to the given object.void
Checks that the actual iterable is ordered, according to the natural ordering of its elements.final void
isInOrder
(Comparator<?> comparator) Checks that the actual iterable is ordered, according to the given comparator.void
Checks that the actual iterable is strictly ordered, according to the natural ordering of its elements.final void
isInStrictOrder
(Comparator<?> comparator) Checks that the actual iterable is strictly ordered, according to the given comparator.void
Deprecated.final void
Checks that the actual iterable is not empty.void
Deprecated.You probably meant to callcontainsNoneIn(java.lang.Iterable<?>)
instead.Methods inherited from class com.google.common.truth.Subject
check, equals, failWithActual, failWithActual, failWithoutActual, hashCode, ignoreCheck, isAnyOf, isIn, isInstanceOf, isNotEqualTo, isNotInstanceOf, isNotNull, isNotSameInstanceAs, isNull, isSameInstanceAs, toString
-
Constructor Details
-
IterableSubject
Constructor for use by subclasses. If you want to create an instance of this class itself, callcheck(...)
.that(actual)
.
-
-
Method Details
-
actualCustomStringRepresentation
Description copied from class:Subject
Supplies the direct string representation of the actual value to other methods which may prefix or otherwise position it in an error message. This should only be overridden to provide an improved string representation of the value under test, as it would appear in any given error message, and should not be used for additional prefixing.Subjects should override this with care.
By default, this returns
String.ValueOf(getActualValue())
.- Overrides:
actualCustomStringRepresentation
in classSubject
-
isEqualTo
Description copied from class:Subject
Checks that the value under test is equal to the given object. For the purposes of this comparison, two objects are equal if any of the following is true:- they are equal according to
Objects.equals(java.lang.Object, java.lang.Object)
- they are arrays and are considered equal by the appropriate
Arrays.equals(long[], long[])
overload - they are boxed integer types (
Byte
,Short
,Character
,Integer
, orLong
) and they are numerically equal when converted toLong
. - the actual value is a boxed floating-point type (
Double
orFloat
), the expected value is anInteger
, and the two are numerically equal when converted toDouble
. (This allowsassertThat(someDouble).isEqualTo(0)
to pass.)
Note: This method does not test the
Object.equals(java.lang.Object)
implementation itself; it assumes that method is functioning correctly according to its contract. Testing anequals
implementation requires a utility such as guava-testlib's EqualsTester.In some cases, this method might not even call
equals
. It may instead perform other tests that will return the same result as long asequals
is implemented according to the contract for its type. - they are equal according to
-
isEmpty
public final void isEmpty()Checks that the actual iterable is empty. -
isNotEmpty
public final void isNotEmpty()Checks that the actual iterable is not empty. -
hasSize
public final void hasSize(int expectedSize) Checks that the actual iterable has the given size. -
contains
-
doesNotContain
-
containsNoDuplicates
public final void containsNoDuplicates()Checks that the actual iterable does not contain duplicate elements. -
containsAnyOf
-
containsAnyIn
-
containsAnyIn
-
containsAtLeast
@CanIgnoreReturnValue public final Ordered containsAtLeast(@Nullable Object firstExpected, @Nullable Object secondExpected, @Nullable Object @Nullable ... restOfExpected) Checks that the actual iterable contains at least all the expected elements. If an element appears more than once in the expected elements to this call then it must appear at least that number of times in the actual elements.To also test that the contents appear in the given order, make a call to
inOrder()
on the object returned by this method. The expected elements must appear in the given order within the actual elements, but they are not required to be consecutive. -
containsAtLeastElementsIn
@CanIgnoreReturnValue public final Ordered containsAtLeastElementsIn(@Nullable Iterable<?> expectedIterable) Checks that the actual iterable contains at least all the expected elements. If an element appears more than once in the expected elements then it must appear at least that number of times in the actual elements.To also test that the contents appear in the given order, make a call to
inOrder()
on the object returned by this method. The expected elements must appear in the given order within the actual elements, but they are not required to be consecutive. -
containsAtLeastElementsIn
Checks that the actual iterable contains at least all the expected elements. If an element appears more than once in the expected elements then it must appear at least that number of times in the actual elements.To also test that the contents appear in the given order, make a call to
inOrder()
on the object returned by this method. The expected elements must appear in the given order within the actual elements, but they are not required to be consecutive. -
containsExactly
Checks that the actual iterable contains exactly the provided objects.Multiplicity is respected. For example, an object duplicated exactly 3 times in the parameters asserts that the object must likewise be duplicated exactly 3 times in the actual iterable.
To also test that the contents appear in the given order, make a call to
inOrder()
on the object returned by this method.To test that the iterable contains the same elements as an array, prefer
containsExactlyElementsIn(Object[])
. It makes clear that the given array is a list of elements, not an element itself. This helps human readers and avoids a compiler warning. -
containsExactlyElementsIn
@CanIgnoreReturnValue public final Ordered containsExactlyElementsIn(@Nullable Iterable<?> expected) Checks that the actual iterable contains exactly the provided objects.Multiplicity is respected. For example, an object duplicated exactly 3 times in the
Iterable
parameter asserts that the object must likewise be duplicated exactly 3 times in the actual iterable.To also test that the contents appear in the given order, make a call to
inOrder()
on the object returned by this method. -
containsExactlyElementsIn
@CanIgnoreReturnValue public final Ordered containsExactlyElementsIn(@Nullable Object @Nullable [] expected) Checks that the actual iterable contains exactly the provided objects.Multiplicity is respected. For example, an object duplicated exactly 3 times in the array parameter asserts that the object must likewise be duplicated exactly 3 times in the actual iterable.
To also test that the contents appear in the given order, make a call to
inOrder()
on the object returned by this method. -
containsNoneOf
-
containsNoneIn
-
containsNoneIn
-
isInStrictOrder
public void isInStrictOrder()Checks that the actual iterable is strictly ordered, according to the natural ordering of its elements. Strictly ordered means that each element in the iterable is strictly greater than the element that preceded it.- Throws:
ClassCastException
- if any pair of elements is not mutually ComparableNullPointerException
- if any element is null
-
isInStrictOrder
Checks that the actual iterable is strictly ordered, according to the given comparator. Strictly ordered means that each element in the iterable is strictly greater than the element that preceded it.- Throws:
ClassCastException
- if any pair of elements is not mutually Comparable
-
isInOrder
public void isInOrder()Checks that the actual iterable is ordered, according to the natural ordering of its elements. Ordered means that each element in the iterable is greater than or equal to the element that preceded it.- Throws:
ClassCastException
- if any pair of elements is not mutually ComparableNullPointerException
- if any element is null
-
isInOrder
Checks that the actual iterable is ordered, according to the given comparator. Ordered means that each element in the iterable is greater than or equal to the element that preceded it.- Throws:
ClassCastException
- if any pair of elements is not mutually Comparable
-
isNoneOf
@Deprecated public void isNoneOf(@Nullable Object first, @Nullable Object second, @Nullable Object @Nullable ... rest) Deprecated.You probably meant to callcontainsNoneOf(java.lang.Object, java.lang.Object, java.lang.Object...)
instead.Description copied from class:Subject
Checks that the value under test is not equal to any of the given elements. -
isNotIn
Deprecated.You probably meant to callcontainsNoneIn(java.lang.Iterable<?>)
instead.Description copied from class:Subject
Checks that the value under test is not equal to any element in the given iterable. -
comparingElementsUsing
public <A extends @Nullable Object, E extends @Nullable Object> IterableSubject.UsingCorrespondence<A,E> comparingElementsUsing(Correspondence<? super A, ? super E> correspondence) Starts a method chain for a check in which the actual elements (i.e. the elements of theIterable
under test) are compared to expected elements using the givenCorrespondence
. The actual elements must be of typeA
, the expected elements must be of typeE
. The check is actually executed by continuing the method chain. For example:
whereassertThat(actualIterable).comparingElementsUsing(correspondence).contains(expected);
actualIterable
is anIterable<A>
(or, more generally, anIterable<? extends A>
),correspondence
is aCorrespondence<A, E>
, andexpected
is anE
.Any of the methods on the returned object may throw
ClassCastException
if they encounter an actual element that is not of typeA
. -
formattingDiffsUsing
public <T extends @Nullable Object> IterableSubject.UsingCorrespondence<T,T> formattingDiffsUsing(Correspondence.DiffFormatter<? super T, ? super T> formatter) Starts a method chain for a check in which failure messages may use the givenCorrespondence.DiffFormatter
to describe the difference between an actual element (i.e. an element of theIterable
under test) and the element it is expected to be equal to, but isn't. The actual and expected elements must be of typeT
. The check is actually executed by continuing the method chain. You may well want to useIterableSubject.UsingCorrespondence.displayingDiffsPairedBy(com.google.common.base.Function<? super E, ?>)
to specify how the elements should be paired up for diffing. For example:
whereassertThat(actualFoos) .formattingDiffsUsing(FooTestHelper::formatDiff) .displayingDiffsPairedBy(Foo::getId) .containsExactly(foo1, foo2, foo3);
actualFoos
is anIterable<Foo>
,FooTestHelper.formatDiff
is a static method taking twoFoo
arguments and returning aString
,Foo.getId
is a no-arg instance method returning some kind of ID, andfoo1
, {code foo2}, andfoo3
areFoo
instances.Unlike when using
comparingElementsUsing(com.google.common.truth.Correspondence<? super A, ? super E>)
, the elements are still compared using object equality, so this method does not affect whether a test passes or fails.Any of the methods on the returned object may throw
ClassCastException
if they encounter an actual element that is not of typeT
.- Since:
- 1.1
-
containsNoneOf(java.lang.Object, java.lang.Object, java.lang.Object...)
instead.