Commands

The abstract state data type. This type must be immutable. The state type that encodes the abstract state. The abstract state should model all the features we need from the real state, the system under test. We should leave out all details that aren't needed for specifying our pre- and postconditions. The state type must be called State and be immutable.

o != arg0 is the same as !(o == (arg0)).

Returns a new property that holds if and only if both this and the given property hold. If one of the properties doesn't generate a result, the new property will generate false.

Returns a new property that holds if and only if both this and the given property hold. If one of the properties doesn't generate a result, the new property will generate the same result as the other property.

Put a label on the property to make test reports clearer

Put a label on the property to make test reports clearer

Returns a new property that holds if and only if both this and the given property generates a result with the exact same status. Note that this means that if one of the properties is proved, and the other one passed, then the resulting property will fail.

o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

o == arg0 is the same as o.equals(arg0).

Returns a new property that holds if and only if both this and the given property generates a result with the exact same status. Note that this means that if one of the properties is proved, and the other one passed, then the resulting property will fail.

Combines two properties through implication

This method is used to cast the receiver object to be of type T0.

Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expressionList(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

Convenience method that checks this property and reports the result on the console. Calling p.check is equal to calling Test.check(p), but this method does not return the test statistics. If you need to get the results from the test, or if you want more control over the test parameters, use the check methods in Test instead.

This method creates and returns a copy of the receiver object.

The default implementation of the clone method is platform dependent.

This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on non-null instances of AnyRef: * It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true. * It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and only if y.eq(x) returns true. * It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.

Additionally, the eq method has three other properties. * It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false. * For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false. * null.eq(null) returns true.

When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation]: * It is reflexive: for any instance x of type Any, x.equals(x) should return true. * It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true. * It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects that are "equal" (o1.equals(o2) returns true) hash to the same scala.Int (o1.hashCode.equals(o2.hashCode)).

This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.

The command generator. Given an abstract state, the generator should return a command that is allowed to run in that state. Note that it is still neccessary to define preconditions on the commands if there are any. The generator is just giving a hint of which commands that are suitable for a given state, the preconditions will still be checked before a command runs. Sometimes you maybe want to adjust the distribution of your command generator according to the state, or do other calculations based on the state.

Returns a representation that corresponds to the dynamic class of the receiver object.

The nature of the representation is platform dependent.

Returns a hash code value for the object.

The default hashing algorithm is platform dependent.

Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

initialState should reset the system under test to a well defined initial state, and return the abstract version of that state.

This method is used to test whether the dynamic type of the receiver object is T0.

Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

Put a label on the property to make test reports clearer

Convenience method that makes it possible to use a this property as an application that checks itself on execution

o.ne(arg0) is the same as !(o.eq(arg0)).

Wakes up a single thread that is waiting on the receiver object's monitor.

Wakes up all threads that are waiting on the receiver object's monitor.

Returns a string representation of the object.

The default representation is platform dependent.

Put a label on the property to make test reports clearer

Put a label on the property to make test reports clearer

Returns a new property that holds if either this or the given property (or both) hold.