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/*
* Copyright 2006-2007, Unitils.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.unitils.mock;
import org.unitils.mock.annotation.MatchStatement;
import org.unitils.mock.core.MockObject;
import org.unitils.mock.mockbehavior.MockBehavior;
/**
* Declares the contract for a controller object that enables defining the behavior of methods of a mock object,
* or for performing assert statements that verify that certain calls were effectively made. A method is also defined
* that provides access to the actual mock object.
*
* If Unitils encounters a field declared as {@link Mock}, a {@link MockObject} is automatically instantiated and
* assigned to the declared field.
*/
public interface Mock {
/**
* Gets the mock proxy instance. This is the instance that can be used to perform the test.
* You could for example inject it in the tested object. It will then perform the defined behavior and record
* all observed method invocations so that assertions can be performed afterwards.
*
* @return The proxy instance, not null
*/
T getMock();
/**
* Defines behavior for this mock so that it will return the given value when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.returns("aValue").method1();
*
* will return "aValue" when method1 is called.
*
* Note that this behavior is executed each time a match is found. So "aValue" will be returned
* each time method1() is called. If you only want to return the value once, use the {@link #onceReturns} method.
*
* @param returnValue The value to return
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T returns(Object returnValue);
/**
* Defines behavior for this mock so that it raises the given exception when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.raises(new MyException()).method1();
*
* will throw the given exception when method1 is called.
*
* Note that this behavior is executed each time a match is found. So the exception will be raised
* each time method1() is called. If you only want to raise the exception once, use the {@link #onceRaises} method.
*
* @param exception The exception to raise, not null
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T raises(Throwable exception);
/**
* Defines behavior for this mock so that it raises an instance of the given exception class when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.raises(new MyException()).method1();
*
* will throw an instance of the given exception class when method1 is called.
*
* Note that this behavior is executed each time a match is found. So the exception will be raised
* each time method1() is called. If you only want to raise the exception once, use the {@link #onceRaises} method.
*
* @param exceptionClass The class of the exception to raise, not null
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T raises(Class exceptionClass);
/**
* Defines behavior for this mock so that will be performed when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.performs(new MyMockBehavior()).method1();
*
* will execute the given mock behavior when method1 is called.
*
* Note that this behavior is executed each time a match is found. So the behavior will be executed
* each time method1() is called. If you only want to execute the behavior once, use the {@link #oncePerforms} method.
*
* @param mockBehavior The behavior to perform, not null
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T performs(MockBehavior mockBehavior);
/**
* Defines behavior for this mock so that it will return the given value when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.onceReturns("aValue").method1();
*
* will return "aValue" when method1 is called.
*
* Note that this behavior is executed only once. If method1() is invoked a second time, a different
* behavior definition will be used (if defined) or a default value will be returned. If you want this
* definition to be able to be matched multiple times, use the method {@link #returns} instead.
*
* @param returnValue The value to return
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T onceReturns(Object returnValue);
/**
* Defines behavior for this mock so that it raises an instance of the given exception class when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.raises(new MyException()).method1();
*
* will throw an instance of the given exception class when method1 is called.
*
* Note that this behavior is executed only once. If method1() is invoked a second time, a different
* behavior definition will be used (if defined) or a default value will be returned. If you want this
* definition to be able to be matched multiple times, use the method {@link #raises} instead.
*
* @param exception The exception to raise, not null
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T onceRaises(Throwable exception);
/**
* Defines behavior for this mock so that it raises an instance of the given exception class when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.raises(new MyException()).method1();
*
* will throw an instance of the given exception class when method1 is called.
*
* Note that this behavior is executed only once. If method1() is invoked a second time, a different
* behavior definition will be used (if defined) or a default value will be returned. If you want this
* definition to be able to be matched multiple times, use the method {@link #raises} instead.
*
* @param exceptionClass The class of the exception to raise, not null
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T onceRaises(Class exceptionClass);
/**
* Defines behavior for this mock so that will be performed when the invocation following
* this call matches the observed behavior. E.g.
*
* mock.performs(new MyMockBehavior()).method1();
*
* will execute the given mock behavior when method1 is called.
*
* Note that this behavior is executed only once. If method1() is invoked a second time, a different
* behavior definition will be used (if defined) or a default value will be returned. If you want this
* definition to be able to be matched multiple times, use the method {@link #performs} instead.
*
* @param mockBehavior The behavior to perform, not null
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T oncePerforms(MockBehavior mockBehavior);
/**
* Asserts that an invocation that matches the invocation following this call has been observed
* on this mock object during this test.
*
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T assertInvoked();
/**
* Asserts that an invocation that matches the invocation following this call has been observed
* on this mock object during this test.
*
* If this method is used multiple times during the current test, the sequence of the observed method
* calls has to be the same as the sequence of the calls to this method.
*
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T assertInvokedInSequence();
/**
* Asserts that no invocation that matches the invocation following this call has been observed
* on this mock object during this test.
*
* @return The proxy instance that will record the method call, not null
*/
@MatchStatement
T assertNotInvoked();
/**
* Removes all behavior defined for this mock.
* This will only remove the behavior, not the observed invocations for this mock.
*/
void resetBehavior();
}
