mock.MatchedBy cannot match against context.Context, always get Unexpected Method Call

[abhinav3295]

I am trying to mock a function that has context.Context as an argument. But when I use mock.Anything tests run fine, but on using mock.MatchedBy I am always getting Unexpected Method Call

func TestSomeClass_funcA(t *testing.T) {
    helper := MockHelper{}
    helper.On("funcA", mock.MatchedBy(func(ctx context.Context) bool {
        return ctx.Value("foo-bar") != nil
    })).Return(true)
    main := MainClass{
        helper: helper,
    }
    assert.True(t, main.funcMain())
}

sample project to reproduce the bug is attached. reproduceStrecherBug.zip

[devdinu]

@abhinav3295 You've to add the value to the context before calling funcA.

    ctx := context.Background()
    ctx = context.WithValue(ctx, "asas", "some")
    return m.helper.funcA(ctx)

makes the test pass.

Thanks for sharing the code which's easy to reproduce and help 👍

[rbtcollins]

Perhaps this bug should get closed?

[abhinav3295]

Thanks!