public class AssertionsForInterfaceTypes extends AssertionsForClassTypes
For example:
int removed = employees.removeFired();
assertThat
(removed).isZero
();
List<Employee> newEmployees = employees.hired(TODAY);
assertThat
(newEmployees).hasSize
(6);
Java 8 is picky when choosing the right assertThat
method if the object under test is generic and bounded,
for example if foo is instance of T that extends Exception, java 8 will complain that it can't resolve
the proper assertThat
method (normally assertThat(Throwable)
as foo might implement an interface like List,
if that occurred assertThat(List)
would also be a possible choice - thus confusing java 8.
This why Assertions
have been split in AssertionsForClassTypes
and AssertionsForInterfaceTypes
(see http://stackoverflow.com/questions/29499847/ambiguous-method-in-java-8-why).
Modifier | Constructor and Description |
---|---|
protected |
AssertionsForInterfaceTypes()
Creates a new
Assertions . |
Modifier and Type | Method and Description |
---|---|
static <ACTUAL extends Iterable<? extends ELEMENT>,ELEMENT,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> |
assertThat(ACTUAL actual,
Class<ELEMENT_ASSERT> assertClass) |
static <T> T |
assertThat(AssertProvider<T> component)
Delegates the creation of the
Assert to the AssertProvider.assertThat() of the given component. |
static AbstractCharSequenceAssert<?,? extends CharSequence> |
assertThat(CharSequence actual)
Creates a new instance of
. |
static DoublePredicateAssert |
assertThat(DoublePredicate actual)
Create assertion for
DoublePredicate . |
static IntPredicateAssert |
assertThat(IntPredicate actual)
Create assertion for
IntPredicate . |
static <ELEMENT> AbstractIterableAssert<?,Iterable<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> |
assertThat(Iterable<? extends ELEMENT> actual)
Creates a new instance of
. |
static <ACTUAL extends Iterable<? extends ELEMENT>,ELEMENT,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> |
assertThat(Iterable<? extends ELEMENT> actual,
AssertFactory<ELEMENT,ELEMENT_ASSERT> assertFactory)
Creates a new instance of
. |
static <ELEMENT> AbstractIterableAssert<?,Iterable<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> |
assertThat(Iterator<? extends ELEMENT> actual)
Creates a new instance of
. |
static <ELEMENT> AbstractListAssert<?,List<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> |
assertThat(List<? extends ELEMENT> actual)
Creates a new instance of
. |
static <ACTUAL extends List<? extends ELEMENT>,ELEMENT,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> |
assertThat(List<? extends ELEMENT> actual,
AssertFactory<ELEMENT,ELEMENT_ASSERT> assertFactory) |
static <ELEMENT,ACTUAL extends List<? extends ELEMENT>,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> |
assertThat(List<? extends ELEMENT> actual,
Class<ELEMENT_ASSERT> assertClass) |
static LongPredicateAssert |
assertThat(LongPredicate actual)
Create assertion for
LongPredicate . |
static <K,V> MapAssert<K,V> |
assertThat(Map<K,V> actual)
Creates a new instance of
. |
static AbstractPathAssert<?> |
assertThat(Path actual)
Creates a new instance of
PathAssert |
static <T> PredicateAssert<T> |
assertThat(Predicate<T> actual)
Create assertion for
Predicate . |
static <ELEMENT> AbstractListAssert<?,List<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> |
assertThat(Stream<? extends ELEMENT> actual)
Creates a new instance of
from the given Stream . |
static <T extends Comparable<? super T>> |
assertThat(T actual)
Creates a new instance of
with
standard comparison semantics. |
static <T extends AssertDelegateTarget> |
assertThat(T assertion)
Returns the given assertion.
|
allOf, allOf, anyOf, anyOf, assertThatExceptionOfType, assertThatThrownBy, atIndex, catchThrowable, contentOf, contentOf, contentOf, contentOf, contentOf, contentOf, doesNotHave, entry, extractProperty, extractProperty, fail, fail, failBecauseExceptionWasNotThrown, filter, filter, in, linesOf, linesOf, linesOf, linesOf, linesOf, linesOf, not, not, notIn, offset, offset, registerCustomDateFormat, registerCustomDateFormat, setAllowComparingPrivateFields, setAllowExtractingPrivateFields, setLenientDateParsing, setMaxLengthForSingleLineDescription, setRemoveAssertJRelatedElementsFromStackTrace, shouldHaveThrown, tuple, useDefaultDateFormatsOnly, within, within, within, within, within, within, within, withinPercentage, withinPercentage, withinPercentage
protected AssertionsForInterfaceTypes()
Assertions
.public static <T> T assertThat(AssertProvider<T> component)
Assert
to the AssertProvider.assertThat()
of the given component.
Read the comments on AssertProvider
for an example of its usage.
component
- the component that creates its own assertAssert
of the given componentpublic static AbstractCharSequenceAssert<?,? extends CharSequence> assertThat(CharSequence actual)
CharSequenceAssert
.actual
- the actual value.public static <ELEMENT> AbstractIterableAssert<?,Iterable<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> assertThat(Iterable<? extends ELEMENT> actual)
IterableAssert
.actual
- the actual value.public static <ELEMENT> AbstractIterableAssert<?,Iterable<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> assertThat(Iterator<? extends ELEMENT> actual)
IterableAssert
.
Be aware that calls to most methods on returned IterableAssert will consume Iterator so it won't be possible to iterate over it again. Calling multiple methods on returned IterableAssert is safe as Iterator's elements are cached by IterableAssert first time Iterator is consumed.
actual
- the actual value.public static <ELEMENT> AbstractListAssert<?,List<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> assertThat(List<? extends ELEMENT> actual)
ListAssert
.actual
- the actual value.public static <ELEMENT> AbstractListAssert<?,List<? extends ELEMENT>,ELEMENT,ObjectAssert<ELEMENT>> assertThat(Stream<? extends ELEMENT> actual)
ListAssert
from the given Stream
.
Be aware that to create the returned ListAssert
the given the Stream
is consumed so it won't be
possible to use it again. Calling multiple methods on the returned ListAssert
is safe as it only
interacts with the List
built from the Stream
.
actual
- the actual Stream
value.public static <ACTUAL extends Iterable<? extends ELEMENT>,ELEMENT,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> FactoryBasedNavigableIterableAssert<?,ACTUAL,ELEMENT,ELEMENT_ASSERT> assertThat(Iterable<? extends ELEMENT> actual, AssertFactory<ELEMENT,ELEMENT_ASSERT> assertFactory)
IterableAssert
.actual
- the actual value.public static <ACTUAL extends Iterable<? extends ELEMENT>,ELEMENT,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> ClassBasedNavigableIterableAssert<?,ACTUAL,ELEMENT,ELEMENT_ASSERT> assertThat(ACTUAL actual, Class<ELEMENT_ASSERT> assertClass)
public static <ACTUAL extends List<? extends ELEMENT>,ELEMENT,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> FactoryBasedNavigableListAssert<?,ACTUAL,ELEMENT,ELEMENT_ASSERT> assertThat(List<? extends ELEMENT> actual, AssertFactory<ELEMENT,ELEMENT_ASSERT> assertFactory)
public static <ELEMENT,ACTUAL extends List<? extends ELEMENT>,ELEMENT_ASSERT extends AbstractAssert<ELEMENT_ASSERT,ELEMENT>> ClassBasedNavigableListAssert<?,ACTUAL,ELEMENT,ELEMENT_ASSERT> assertThat(List<? extends ELEMENT> actual, Class<ELEMENT_ASSERT> assertClass)
public static AbstractPathAssert<?> assertThat(Path actual)
PathAssert
actual
- the path to testpublic static <K,V> MapAssert<K,V> assertThat(Map<K,V> actual)
MapAssert
.
Returned type is MapAssert
as it overrides method to annotate them with SafeVarargs
avoiding
annoying warnings.
actual
- the actual value.public static <T extends Comparable<? super T>> AbstractComparableAssert<?,T> assertThat(T actual)
GenericComparableAssert
with
standard comparison semantics.actual
- the actual value.public static <T extends AssertDelegateTarget> T assertThat(T assertion)
assertThat
.
Consider for example the following MyButton and MyButtonAssert classes:
public class MyButton extends JButton {
private boolean blinking;
public boolean isBlinking() { return this.blinking; }
public void setBlinking(boolean blink) { this.blinking = blink; }
}
private static class MyButtonAssert implements AssertDelegateTarget {
private MyButton button;
MyButtonAssert(MyButton button) { this.button = button; }
void isBlinking() {
// standard assertion from core Assertions.assertThat
assertThat(button.isBlinking()).isTrue();
}
void isNotBlinking() {
// standard assertion from core Assertions.assertThat
assertThat(button.isBlinking()).isFalse();
}
}
As MyButtonAssert implements AssertDelegateTarget, you can use assertThat(buttonAssert).isBlinking();
instead of buttonAssert.isBlinking();
to have easier to read assertions:
@Test
public void AssertDelegateTarget_example() {
MyButton button = new MyButton();
MyButtonAssert buttonAssert = new MyButtonAssert(button);
// you can encapsulate MyButtonAssert assertions methods within assertThat
assertThat(buttonAssert).isNotBlinking(); // same as : buttonAssert.isNotBlinking();
button.setBlinking(true);
assertThat(buttonAssert).isBlinking(); // same as : buttonAssert.isBlinking();
}
T
- the generic type of the user-defined assert.assertion
- the assertion to return.public static <T> PredicateAssert<T> assertThat(Predicate<T> actual)
Predicate
.T
- the type of the value contained in the Predicate
.actual
- the actual value.public static IntPredicateAssert assertThat(IntPredicate actual)
IntPredicate
.actual
- the actual value.public static LongPredicateAssert assertThat(LongPredicate actual)
LongPredicate
.actual
- the actual value.public static DoublePredicateAssert assertThat(DoublePredicate actual)
DoublePredicate
.actual
- the actual value.Copyright © 2014–2016 AssertJ. All rights reserved.