go test 测试用例那些事（二） mock

mockgen -source=src.go [other options]

package d1

type User interface {
	Name() string
	SetAge(age int) bool
	V(idx int, name string) (string, error)
}

mockgen -source=user.go

mockgen -source=user.go -destination ./dao/u_mock.go -package mock_data

//go:generate mockgen -destination ./dao/u_mock.go -package mock_data -source user.go

DAO_DIR=./dao
DAO_MOCK_DIR=$(DAO_DIR)/mock_dao
DAO_FILES=$(shell find $(DAO_DIR) -not -path "$(DAO_MOCK_DIR)/*" -type f -name "*.go" -not -name "*_test.go" -not -name "dao_init.go" -not -name "dao.go")

SERVICE_DIR=./service
SERVICE_MOCK_DIR=$(SERVICE_DIR)/mock_srv
SERVICE_FILES=$(shell find $(SERVICE_DIR) -not -path "$(SERVICE_MOCK_DIR)/*" -type f -name "*.go" -not -name "*_test.go" -not -name "service.go" -not -name "system_filter.go")

define gen-mock-file
	@for f in $(3); do \
		eval t=`echo $$f | sed 's#$(1)#$(2)#'` ; \
		mockgen -source=$$f -destination=$$t ; \
	done
endef

.PHONY: gen-mock-dao
gen-mock-dao:
	$(call gen-mock-file,$(DAO_DIR),$(DAO_MOCK_DIR),$(DAO_FILES))

.PHONY: gen-mock-service
gen-mock-service:
	$(call gen-mock-file,$(SERVICE_DIR),$(SERVICE_MOCK_DIR),$(SERVICE_FILES))

gen-mock-all:
	@echo begin gen code
	@$(MAKE) gen-mock-dao
	@$(MAKE) gen-mock-service
	@echo done

func TestUser1(t *testing.T) {
	mockUser := mock_data.NewMockUser(gomock.NewController(t))
	mockUser.EXPECT().V(gomock.Any(), "2").Return("a", nil).AnyTimes()
	var u User = mockUser
	a, err := u.V(1, "2")
	t.Log(a, err)
}

	mockUser := mock_data.NewMockUser(gomock.NewController(t))
	mockUser.EXPECT().V(1, "2").DoAndReturn(func(idx int, n string) (string, error) {
		t.Log(idx, "  ", n)
		return "1", nil
	})

	mockUser.EXPECT().V(1, "2").Do(func(id int, name string) {
		t.Log(id, " ", name)
	}).Do(func(id int, name string) {
		t.Log("do2 ", id)
	}).Return("a", nil)

// MockUser is a mock of User interface
type MockUser struct {
	ctrl     *gomock.Controller
	recorder *MockUserMockRecorder
}

// MockUserMockRecorder is the mock recorder for MockUser
type MockUserMockRecorder struct {
	mock *MockUser
}

// NewMockUser creates a new mock instance
func NewMockUser(ctrl *gomock.Controller) *MockUser {
	mock := &MockUser{ctrl: ctrl}
	mock.recorder = &MockUserMockRecorder{mock}
	return mock
}

// EXPECT returns an object that allows the caller to indicate expected use
func (m *MockUser) EXPECT() *MockUserMockRecorder {
	return m.recorder
}

// V mocks base method
func (m *MockUser) V(idx int, name string) (string, error) {
	m.ctrl.T.Helper()
	ret := m.ctrl.Call(m, "V", idx, name)
	ret0, _ := ret[0].(string)
	ret1, _ := ret[1].(error)
	return ret0, ret1
}

// V indicates an expected call of V
func (mr *MockUserMockRecorder) V(idx, name interface{}) *gomock.Call {
	mr.mock.ctrl.T.Helper()
	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "V", reflect.TypeOf((*MockUser)(nil).V), idx, name)
}

type Call struct {
	t TestHelper // for triggering test failures on invalid call setup
	receiver   interface{}  // the receiver of the method call
	method     string       // the name of the method
	methodType reflect.Type // the type of the method
	args       []Matcher    // the args
	origin     string       // file and line number of call setup
	preReqs []*Call // prerequisite calls
	// Expectations
	minCalls, maxCalls int
	numCalls int // actual number made

	// actions are called when this Call is called. Each action gets the args and
	// can set the return values by returning a non-nil slice. Actions run in the
	// order they are created.
	actions []func([]interface{}) []interface{}
}