randoop.contract

Class CompareToAntiSymmetric

java.lang.Object

randoop.contract.ObjectContract

randoop.contract.CompareToAntiSymmetric

public class CompareToAntiSymmetric
extends ObjectContract

The contract: Checks that an object is antisymmetric over compareTo.

Math.signum(x0.compareTo(x1)) == -Math.signum(x1.compareTo(x0))

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static TypeTuple	inputTypes The arguments to which this contract can be applied.
private static CompareToAntiSymmetric	instance

Constructor Summary

Constructors

Modifier	Constructor and Description
private	CompareToAntiSymmetric()

Method Summary

Modifier and Type	Method and Description
boolean	evaluate(java.lang.Object... objects) Evaluates the contract on the given values.
java.lang.String	get_observer_str() Returns a string describing the observer.
int	getArity() The number of values that this contract is over.
TypeTuple	getInputTypes() Returns the input types for this contract.
static CompareToAntiSymmetric	getInstance()
java.lang.String	toCodeString() A string that can be used as Java source code and will result in the expression being evaluated.
java.lang.String	toCommentString() A string that will be inserted as a comment in the test before the code corresponding to this contract.

Methods inherited from class randoop.contract.ObjectContract

checkContract, failedContract, toStringHandleExceptions

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

instance

private static final CompareToAntiSymmetric instance

inputTypes

static TypeTuple inputTypes

The arguments to which this contract can be applied.

Constructor Detail

CompareToAntiSymmetric

private CompareToAntiSymmetric()

Method Detail

getInstance

public static CompareToAntiSymmetric getInstance()

evaluate

public boolean evaluate(java.lang.Object... objects)

Description copied from class: ObjectContract

Evaluates the contract on the given values. Returns false if the contract was violated. Returns true if the contract was satisfied or was not applicable.

When calling this method during execution of a test, Randoop guarantees that objects does not contain any null objects, and that objects.length == getArity().

Specified by:

evaluate in class ObjectContract

Parameters:

objects - the actual parameters to this contract

Returns:

false if the contract is violated, true otherwise

getArity

public int getArity()

Description copied from class: ObjectContract

The number of values that this contract is over.

Specified by:

getArity in class ObjectContract

Returns:

the number of arguments to the contract

getInputTypes

public TypeTuple getInputTypes()

Description copied from class: ObjectContract

Returns the input types for this contract.

Specified by:

getInputTypes in class ObjectContract

Returns:

the input types for this contract

toCommentString

public java.lang.String toCommentString()

Description copied from class: ObjectContract

A string that will be inserted as a comment in the test before the code corresponding to this contract. Occurrences of variables x0, x1, x2, etc. in the string will be replaced by actual values.

Specified by:

toCommentString in class ObjectContract

Returns:

the comment string representation of this contract

get_observer_str

public java.lang.String get_observer_str()

Description copied from class: ObjectContract

Returns a string describing the observer.

Specified by:

get_observer_str in class ObjectContract

Returns:

a string description of the contract

toCodeString

public java.lang.String toCodeString()

Description copied from class: ObjectContract

A string that can be used as Java source code and will result in the expression being evaluated.

The N-th object that participates in the contract check should be referred to as "xN" (for N one of 0, ... , 9). For example, if the expression of arity 2 represents a call of the equals method between two objects, the code should be something like assert x0.equals(x1);".

The string does not contain a trailing newline. When there is a leading comment, it should start with a newline.

Specified by:

toCodeString in class ObjectContract

Returns:

the code string representation of this contract; must be non-null