gotestify

AssertCalled always fails with testify library


I am using testify to test my code and I want to check if a function was called.

I am doing the following:

type Foo struct {
    mock.Mock
}

func (m Foo) Bar() {

}

func TestFoo(t *testing.T) {
    m := Foo{}
    m.Bar()
    m.AssertCalled(t, "Bar")
}

The error I am getting:

Error:      Should be true
Messages:   The "Bar" method should have been called with 0 argument(s), but was not.

mock.go:419: []

I call function "Bar" and immediately ask if it was called but it returns false. What am I doing wrong? What is the proper way to test if a function was called with testify?


Solution

  • I tried with this and works:

    type Foo struct {                                                                                                                                                    
        mock.Mock                                                                                                                                                          
    }                                                                                                                                                                    
    
    func (m *Foo) Bar() {                                                                                                                                                
        m.Called()                                                                                                                                                         
    }                                                                                                                                                                    
    
    func TestFoo(t *testing.T) {                                                                                                                                         
        m := &Foo{}                                                                                                                                                        
        m.On("Bar").Return(nil)                                                                                                                                            
    
        m.Bar()                                                                                                                                                            
        m.AssertCalled(t, "Bar")                                                                                                                                           
    }
    

    As stated by Chris Drew, you've to use a receiver pointer on Bar method's declaration.

    Additionally, you've to istantiate a new structure as pointer and mock the method to return a value.