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JMock expectations oneOf VS one difference Is any difference in using one() or oneOf() in JMock? In cheat sheet mentioned before there is also example. Appendix A. jMock2 Cheat Sheet Introduction We use jMock2 as our mock object We’re using JUnit (we assume you’re familiar with it); jMock also. jMock 1 Documentation Stubs, Expectations and the Dispatch of Mocked Methods in jMock 1 3; Mocking Classes with jMock 1 and CGLIB 4 Cheat Sheet .

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Tests written with JUnit 3 can extend MockObjectTestCase, in which case they don’t need to aheet create or refer to the context. An expectation that uses parameter matchers must use the “with” method to wrap every parameter, whether a matcher function or a literal value.

We first set up the context in which our test will execute.

If not specified, the state machine starts in an unnamed initial state. The jMock library is explored in more depth in other Cookbook recipes 2. The argument is not null.

cheqt More matchers are defined as static factory methods of the Hamcrest Matchers class 2which can be statically imported at the top of the test code. The JUnit 3 and JUnit 4 integration layers automatically assert that all expectations have been satisfied.

The invocation is not expected at all. Matchers are created by factory methods, such as lessThanequal and stringContaining in the example above, to ensure that the expectation is easy to read. The following code specifies that the method “doSomething” must be called with a string that contains the text “hello” and the text “world”.

The same as allowing.

The following code specifies that the method “doSomething” must be called with a string that either contains the text “hello” or the text “howdy”. JUnit 3 JUnit 4 Other. This is a tighter constraint than equalbut is usually what you want for arguments that pass references to behavioural objects. Software jMock 2 Java 1. Invocations that are expected in a sequence must occur in the order in which they appear in the test code. An invocation can be constrained to occur during a state of one ceat more state machines.


If the expected calls were not made, the test will fail. The following code specifies that method “doSomething” will be called with one argument that refers to the same object as expected. An overloaded version of the equal constraint specifies floating point values as equal to another value with some margin of error to account for rounding error.

Matchers can be combined to tighten or loosen the specification if necessary. The JMock test runner does this automatically. A test can create multiple state machines and each state machine can have multiple states. Changes the state of state-machine to the named state when the invocation occurs. A test can contain multiple expectation blocks.

The same matcher specifies that the actual value of the argument must be the same object as the expected value. To define looser constraints, specify all arguments as matchers within with clauses:. LoganMzz 1, 2 12 Next we define expectations 1 on the mock Chezt that specify the methods that we expect to be called upon it during the test run. A Publisher sends messages to zero or more Subscribers. Loose parameter constraints are defined by specifying matchers for each parameter.

The most commonly used matcher is equalwhich specifies that the received argument must be equal to a given value. chext

Expect a Sequence of Invocations

The type argument is required to force Java to type-check the argument at compile time. To expect a sequence of invocations, write the expectations in order and add the inSequence sequence clause to each one.

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Constrains the last expectation to occur only when the state machine is in the named state. Which probably says that oneOf means that I expect that could be more invocations of method add and in this case there are two invocations one of them is with parameters 1 and 1, and second with parameters 2 and 2. Except for the invocation count and the mock object, all clauses are optional.


Jmodk stringContaining matcher specifies that the expected argument must be a string that contains the given substring. We then register the Subscriber with the Publisher.

jMock – Expect a Sequence of Invocations

A Mockery represents the context of the object under test: Take a look at source code of AbstractExpectations. Conditions are represented as states of state machines. In older versions of jMock and JUnit 4 you can use the JMock test runner, which is less flexible than the Rules mechanism shown above. An expectations block can contain any number of expectations. Expectations can be interspersed with calls to the code under test. 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.

But the exactly one aka exactly 1. Email Required, but never shown. Stack Overflow works best with JavaScript enabled. The following code specifies that the method “doSomething” will be called with one argument of value 1 plus or minus 0. JUnit 3 JUnit 4 Other. The MockObjectTestCase does this automatically. The question is if there is any difference between this keywords or it means equaly the same thing.

Software jMock 2 Java 1.