org.assertj.core.internal

Interface ComparisonStrategy

All Known Implementing Classes:

AbstractComparisonStrategy, ComparatorBasedComparisonStrategy, IterableElementComparisonStrategy, ObjectArrayElementComparisonStrategy, StandardComparisonStrategy

public interface ComparisonStrategy

Describes the contract to implement a consistent comparison strategy that covers :
- comparing two objects for equality and order
- knowing if an object belongs to a group of objects (collection/array)
- determining duplicates in a group of objects (collection/array)
- string specific comparison

Author:

Joel Costigliola

Method Summary

Modifier and Type	Method and Description
boolean	areEqual(Object actual, Object other) Returns true if actual and other are equal according to the implemented comparison strategy.
boolean	arrayContains(Object array, Object value) Returns true if given array contains given value according to the implemented comparison strategy, false otherwise.
Iterable<?>	duplicatesFrom(Iterable<?> iterable) Returns any duplicate elements from the given Iterable according to the implemented comparison strategy.
boolean	isGreaterThan(Object actual, Object other) Returns true if actual is greater than other, false otherwise.
boolean	isGreaterThanOrEqualTo(Object actual, Object other) Returns true if actual is greater than or equal to other, false otherwise.
boolean	isLessThan(Object actual, Object other) Returns true if actual is less than other, false otherwise.
boolean	isLessThanOrEqualTo(Object actual, Object other) Returns true if actual is less than or equal to other, false otherwise.
boolean	isStandard() Return true if comparison strategy is default/standard, false otherwise
boolean	iterableContains(Iterable<?> collection, Object value) Returns true if given Iterable contains given value according to the implemented comparison strategy, false otherwise. If given Iterable is null, return false.
void	iterableRemoves(Iterable<?> iterable, Object value) Look for given value in given Iterable according to the implemented comparison strategy, if value is found it is removed from it. If given Iterable is null, does nothing.
boolean	stringContains(String string, String sequence) Returns true if given string contains given sequence according to the implemented comparison strategy, false otherwise.
boolean	stringEndsWith(String string, String suffix) Returns true if sstring ends with suffix according to the implemented comparison strategy, false otherwise.
boolean	stringStartsWith(String string, String prefix) Returns true if string starts with prefix according to the implemented comparison strategy, false otherwise.

Method Detail

areEqual

boolean areEqual(Object actual,
                 Object other)

Returns true if actual and other are equal according to the implemented comparison strategy.

Parameters:

actual - the object to compare to other

other - the object to compare to actual

Returns:

true if actual and other are equal according to the underlying comparison strategy.

isGreaterThan

boolean isGreaterThan(Object actual,
                      Object other)

Returns true if actual is greater than other, false otherwise.

Parameters:

actual - the object to compare to other

other - the object to compare to actual

Returns:

true if actual is greater than other, false otherwise.

Throws:

UnsupportedOperationException - if operation is not supported by a concrete implementation.

isGreaterThanOrEqualTo

boolean isGreaterThanOrEqualTo(Object actual,
                               Object other)

Returns true if actual is greater than or equal to other, false otherwise.

Parameters:

actual - the object to compare to other

other - the object to compare to actual

Returns:

true if actual is greater than or equal to other, false otherwise.

Throws:

UnsupportedOperationException - if operation is not supported by a concrete implementation.

isLessThan

boolean isLessThan(Object actual,
                   Object other)

Returns true if actual is less than other, false otherwise.

Parameters:

actual - the object to compare to other

other - the object to compare to actual

Returns:

true if actual is less than other, false otherwise.

Throws:

UnsupportedOperationException - if operation is not supported by a concrete implementation.

isLessThanOrEqualTo

boolean isLessThanOrEqualTo(Object actual,
                            Object other)

Returns true if actual is less than or equal to other, false otherwise.

Parameters:

actual - the object to compare to other

other - the object to compare to actual

Returns:

true if actual is less than or equal to other, false otherwise.

Throws:

UnsupportedOperationException - if operation is not supported by a concrete implementation.

iterableContains

boolean iterableContains(Iterable<?> collection,
                         Object value)

Returns true if given Iterable contains given value according to the implemented comparison strategy, false otherwise.
If given Iterable is null, return false.

Parameters:

collection - the Iterable to search value in

value - the object to look for in given Iterable

Returns:

true if given Iterable contains given value according to the implemented comparison strategy, false otherwise.

iterableRemoves

void iterableRemoves(Iterable<?> iterable,
                     Object value)

Look for given value in given Iterable according to the implemented comparison strategy, if value is found it is removed from it.
If given Iterable is null, does nothing.

Parameters:

iterable - the Iterable we want remove value from

value - object to remove from given Iterable

duplicatesFrom

Iterable<?> duplicatesFrom(Iterable<?> iterable)

Returns any duplicate elements from the given Iterable according to the implemented comparison strategy.

Parameters:

iterable - the given Iterable we want to extract duplicate elements.

Returns:

an Iterable containing the duplicate elements of the given one. If no duplicates are found, an empty Iterable is returned.

arrayContains

boolean arrayContains(Object array,
                      Object value)

Returns true if given array contains given value according to the implemented comparison strategy, false otherwise.

Parameters:

array - the array to search value in (must not be null)

value - the object to look for in given array

Returns:

true if given array contains given value according to the implemented comparison strategy, false otherwise.

stringContains

boolean stringContains(String string,
                       String sequence)

Returns true if given string contains given sequence according to the implemented comparison strategy, false otherwise.

Parameters:

string - the string to search sequence in (must not be null)

sequence - the String to look for in given string

Returns:

true if given string contains given sequence according to the implemented comparison strategy, false otherwise.

stringStartsWith

boolean stringStartsWith(String string,
                         String prefix)

Returns true if string starts with prefix according to the implemented comparison strategy, false otherwise.

Parameters:

string - the String we want to look starting prefix

prefix - the prefix String to look for at string's start

Returns:

true if string starts with prefix according to the implemented comparison strategy, false otherwise.

stringEndsWith

boolean stringEndsWith(String string,
                       String suffix)

Returns true if sstring ends with suffix according to the implemented comparison strategy, false otherwise.

Parameters:

string - the String we want to look starting suffix

suffix - the suffix String to look for at string's end

Returns:

true if string ends with suffix according to the implemented comparison strategy, false otherwise.

isStandard

boolean isStandard()

Return true if comparison strategy is default/standard, false otherwise

Returns:

true if comparison strategy is default/standard, false otherwise