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
|Published (Last):||6 March 2006|
|PDF File Size:||16.13 Mb|
|ePub File Size:||7.93 Mb|
|Price:||Free* [*Free Regsitration Required]|
By convention the Mockery is stored in an instance variable named context. 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.
This can be used to clarify exactly when expected calls will happen in response to calls to the object under test. Constants have the added benefit of making the test easier to understand than they would be if unnamed, literal values were used.
You can give an expectation as many inSequencewhenwill and then clauses as you wish. Except for the invocation count 1 and the mock object, all clauses are optional.
An expectations block can contain any number of expectations. The same as allowing. Tests written with JUnit 3 can extend MockObjectTestCase, in which case they don’t need to explictly create or refer to the context. The argument matches one of the Matchers m 1 to m n. States are used to constrain invocations to occur only when a condition is true.
To expect a sequence of invocations, write the expectations in order and add the inSequence sequence clause to each one. 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. This is used to make tests more explicit and so easier to understand.
In outline, a jMock 2 test looks like the following:. Expectations can be interspersed with calls to the code under test.
jMock 2 Cheat Sheet
You can give an expectation as many inSequence 2when 3will and then 4 clauses as you wish. The invocation is expected at least min times and at most max times. Tests written with JUnit 4 do not need to extend a 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.
The argument is not null. The argument matches all of the Matchers m jmokc to m n. JUnit 3 JUnit 4 Other. The examples above assume that the mock object is stored in an instance variable. The argument is null.
The jMock Cookbook
Conditions are represented as states of state machines. Constrains the last expectation to occur only when the state machine is in the named state.
The JUnit 3 and JUnit 4 integration layers automatically assert that all expectations have been satisfied. Software jMock 2 Java 1. A test can contain multiple expectation blocks. A Mockery represents the context of the object under test: 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 jmoci. 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:.
To define looser constraints, specify all arguments as matchers within with clauses:.
Expectations do not have to be defined in the body of the test method. JUnit 3 JUnit 4 Other. Software jMock 2 Java 1. The intial state is optional.
jMock – Specifying Expectations
Each expectation has the following structure:. The invocation is not expected at all. The invocation is expected exactly n times.
A test can create multiple state machines and each state machine can have multiple states. An expectations block can contain any number of expectations. You can define expectations in helper methods or the setUp method to remove duplication or clarify the test code. Changes the state of state-machine to the named state when the invocation occurs. In outline, a jMock 2 test looks like the following: The argument is any value. It is often more convenient to store mock objects in instance variables and define constants for the values used in the test, as the examples above do.
A test can create more than one sequence and an expectation can be part of more than once sequence at a time. If not specified, the state machine starts in an unnamed initial state. Return a new iterator over elements v 1 to v n on each invocation. A Mockery creates mock objects and checks expectations that are set upon those mock objects. The following clauses constrain invocations to occur within specific states and define how an invocation will change the current state of a state machine.
The type argument is required to force Java to type-check the argument at compile time.