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EasyMock Java Testing Mocks Stubs Arguments Matchers Unitils

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Ürgo Ringo
Ürgo Ringo
Economy & Finance
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Easy testing with EasyMock (Java 5) Ürgo Ringo Aqris Software
Developer tests - big theory ,[object Object]
EasyMock mock types (1) ,[object Object],@ Before public void setUp() { userDao = EasyMock. createMock (UserDao. class ); validator = new UserValidator( userDao ); } @ Test public void duplicateLoginNameIsInvalid() throws Exception { User user = ... errors = new BindException(user, "User" ); EasyMock.expect( userDao .isValidLoginName(user)).andReturn( false ); EasyMock.replay( userDao ); validator .validate(user, errors); assertTrue(errors.toString(), errors.hasErrors()); EasyMock.verify( userDao ); }
EasyMock mock types (2) ,[object Object]
useful if test contains many different or complex scenarios (bad style?) userDao = EasyMock. createStrictMock (UserDao. class );
EasyMock mock types (3) ,[object Object]
Warning: are you in “getting it pass” mode?
if cannot implement nice equals for some argument (but there is better alternative!) filterDao = createNiceMock(FilterDao. class ); //expect(filterDao.getFilterId("unique-filter-name", USER_ID)).andReturn(null); replay( filterDao ); validator.validate(filter, errors); assertFalse(errors.hasErrors()); verify( filterDao );
Argument matchers ,[object Object]
aryEq(X value)

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EasyMock Java Testing Mocks Stubs Arguments Matchers Unitils

  • 1. Easy testing with EasyMock (Java 5) Ürgo Ringo Aqris Software
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  • 5. useful if test contains many different or complex scenarios (bad style?) userDao = EasyMock. createStrictMock (UserDao. class );
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  • 7. Warning: are you in “getting it pass” mode?
  • 8. if cannot implement nice equals for some argument (but there is better alternative!) filterDao = createNiceMock(FilterDao. class ); //expect(filterDao.getFilterId("unique-filter-name", USER_ID)).andReturn(null); replay( filterDao ); validator.validate(filter, errors); assertFalse(errors.hasErrors()); verify( filterDao );
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Editor's Notes

  1. Good practice is to assign mock object to field and create it inside setup method. Where to put verify?
  2. Usually not very useful since we don't care about the order. Even if order is important test mostly fails anyway if wrong order of calls.
  3. Does not care about input arguments. Returns default values. Works if you have no expects.
  4. One cotcha – if using arg matcher for one argument must also use for others