如何断言与 stretchr/testify/mock AssertCalled 的部分匹配？

Question

在 Go 中考虑这个单元测试文件。我正在使用 github.com/stretchr/testify/mock 包。

type Person struct {Name string; Age int}
type Doer struct { mock.Mock }

func (d *Doer) doWithThing(arg Person) {
    fmt.Printf("doWithThing %v\n", arg)
    d.Called(arg)
}

func TestDoer(t *testing.T) {
    d := new(Doer)
    d.On("doWithThing", mock.Anything).Return()
    d.doWithThing(Person{Name: "John", Age: 7})
    
    // I don't care what Age was passed. Only Name
    d.AssertCalled(t, "doWithThing", Person{Name: "John"})
}

此测试失败，因为 testify 在我未过年龄时在比较中使用 Age: 0。我明白了，但我想知道，我如何断言通过的部分论点？我希望这个测试通过 Age 是什么，只要 Name = John

Answer 1

使用mock.MatchedBy.

简而言之，它用 mock.argumentMatcher（未导出）包装任意匹配器函数：

argumentMatcher performs custom argument matching, returning whether or not the argument is matched by the expectation fixture function.

特别是mock.MatchedBy的参数是：

[...] a function accepting a single argument (of the expected type) which returns a bool

所以你可以这样使用它：

personNameMatcher := mock.MatchedBy(func(p Person) bool {
    return p.Name == "John"
})
d.AssertCalled(t, "doWithThing", personNameMatcher)

如何断言与 stretchr/testify/mock AssertCalled 的部分匹配？

How to assert a partial match with stretchr/testify/mock AssertCalled?

unit-testing

mocking

go

testify