春豆测试

Question

我有三个bean类，A，B和C.

A类取决于B类和C类属性。

如何在不加载B类和C类的情况下编写Junit测试用例来测试A类？

我知道这个问题很冗长，如果有人有想法请提供一些提示。

此致 Raju komaturi

Answer 1

使用像EasyMock或Mockito这样的模拟框架，并注入B和C的模拟版本。

如果没有Spring，你应该完全这样做，只需以编程方式注入Mocks。

示例：

// Three Interfaces:
public interface FooService{
    String foo(String input);
}
public interface BarService{
    String bar(String input);
}
public interface BazService{
    String baz(String input);
}

// Implementation for FooService that uses the other two interfaces
public class FooServiceImpl implements FooService{
    public void setBarService(BarService barService){
        this.barService = barService;
    }
    private BarService barService;
    public void setBazService(BazService bazService){
        this.bazService = bazService;
    }
    private BazService bazService;
    @Override
    public String foo(String input){
        return barService.bar(input)+bazService.baz(input);
    }
}

// And now here's a test for the service implementation with injected mocks
// that do what we tell them to
public class FooServiceImplTest{

    @Test
    public void testFoo(){
        final FooServiceImpl fsi = new FooServiceImpl();

        final BarService barService = EasyMock.createMock(BarService.class);
        EasyMock.expect(barService.bar("foo")).andReturn("bar");
        fsi.setBarService(barService);

        final BazService bazService = EasyMock.createMock(BazService.class);
        EasyMock.expect(bazService.baz("foo")).andReturn("baz");
        fsi.setBazService(bazService);

        EasyMock.replay(barService, bazService);

        assertEquals(fsi.foo("foo"), "barbaz");
    }

}