Write an awesome description for your new site here. You can edit this line in It will appear in your document head meta (for Google search results ). JUnit + JMock. JMock – Java framework for mock objects, which helps by: automatically creating mock objects The JMock homepage at The JMock Cookbook at http://jmock. org/ The JMock cheetsheet at

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The same as allowing. For example, the test above can be rewritten as follows to more clearly express when the cache loads an object will be loaded and when it returns a cached copy:. A test can contain multiple expectation blocks.

The invocation is not expected at all. The argument is not null.

jMock – Cookbook

Allowing or ignoring should be chosen to make the test code clearly jmmock intent. Tests written with JUnit 4 do not need to extend cpokbook specific base class but must specify that they use jMock with the RunWith attribute, create a JUnit4Mockery that reports expectation failures as JUnit 4 test failures, and store the Mockery in an instance variable.

An expectations block can contain any number of expectations. States are used to constrain invocations to occur only when a condition is true. In outline, a jMock 2 test looks like the following: A test can create more than one sequence and an expectation can be part of more than once sequence at a time. Conditions are represented as dookbook of state machines.

Expectations in later blocks are appended to those in earlier blocks. A test can contain multiple expectation blocks.


The jMock Cookbook

A Mockery represents the context of the object under test: Software jMock 2 Java 1. The argument matches all of the Matchers m 1 to m n. The argument is null. You can define expectations in helper methods or the setUp method to remove duplication or clarify the test code.

jMock – Specifying Expectations

Expectations in later blocks are appended to those in cookboik blocks. If a mock object is stored in a local variable, the variable must be declared as final so that it can be referred to from within expectation blocks see below.

The JUnit 3 and JUnit 4 integration layers automatically assert that all expectations have been satisfied. Except for the invocation count and the mock object, all clauses are optional. Expectations can be interspersed with calls to the code under test. Because the expectations are defined within an anonymous inner class, any mock objects or other values that are stored in local variables and referenced from within the expectations block must be final.

To define looser constraints, specify all arguments as matchers within with clauses:. A Mockery creates mock objects and checks expectations that are set upon those mock objects. The type argument is required to force Java to type-check the argument at compile time.

Return a new iterator over elements v 1 to v n on each invocation. A test can create multiple state machines and each state machine can have multiple states.

This is used to make tests more explicit and so easier to understand. Except for the invocation count 1 and the mock object, all clauses are optional. Software jMock 2 Java 1. The argument matches one of the Matchers jmoock 1 to m n.

JUnit 3 JUnit 4 Other. In outline, a jMock 2 test looks like the following:. This can be used to clarify exactly when expected calls will happen in response to calls to the object under test. The invocation is expected exactly n times.


The most commonly used matchers are defined in the Expectations 1 class:. Do all actions a 1 to a n on every invocation. The examples above assume that the mock object is stored in an instance variable.

Specifying Expectations

JUnit 3 JUnit 4 Other. To expect a sequence of invocations, write the expectations in order and add the inSequence sequence clause to each one. If not specified, the state machine starts in an unnamed initial state. The intial state is optional. Invocations that are expected in a sequence must occur in the order in which they appear in the test code. Expectations do not have to be defined in the body of the test method. Specifying Expectations Expectations are defined within a “Double-Brace Block” that defines the expectations in the context of the the test’s Mockery identified as context in the examples below.

Tests written with JUnit 3 can extend MockObjectTestCase, in which case they don’t need to explictly create or refer coobook the context.

An invocation can be constrained to occur during a state of one more more state machines. Changes the state of state-machine to the named state when the invocation occurs. The following clauses constrain invocations to occur within specific states and define how an invocation will change the current state of a state machine.

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