I had to restructure my code to pass a valiadtor to the function under
test. That fixed the issue.
On Friday, October 14, 2022 at 12:47:39 PM UTC-4 Ron Khera wrote:
> I am using Go 1.19 on a windows machine with 8 cores, operating system is
> Windows 10 Pro. I used the mockgen tool to generate the mock.When I debug
> my test I see the mocked method is recorded when I execute the EXPECT()
> function.The mocked function is called, but test fails with 'missing call'
> on the mocked function.
>
> Can anyone please point what I am doing wrong ?
>
> Directory Structure :
> cmd
> configure.go
> configure_test.go
> mocks
> mock_validator.go
> validator
> validator.go
> user
> user.go
> go.mod
> main.go
> --
> * Contents of main.go
> package main
> import (
> "localdev/mockexample/cmd"
> )
> func main() {
> cmd.Configure()
> }
> * Contents of configure.go
> package cmd
> import (
> "fmt"
> "localdev/mockexample/user"
> "os"
> "localdev/mockexample/validator"
> )
> var (
> name, password string
> )
> func Configure() {
> name := os.Args[1]
> password := os.Args[2]
> user, err := validate(validator.NewValidator(name,
> password))
> if err != nil {
> fmt.Printf("%v\n", err)
> return
> }
> fmt.Printf("Credentials are valid. Welcome: %s %s\n",
> user.FirstName, user.LastName)
> }
> func validate(validator validator.Validator) (*user.Data, error) {
> user, err := validator.ValidateUser()
> if err != nil {
> return nil, fmt.Errorf("some thing went
> wrong. %v", err)
> }
> return user, nil
> }
> * Contents of validator.go
> package validator
> import (
> "fmt"
> "localdev/mockexample/user"
> )
> //go:generate mockgen -destination=../mocks/mock_validator.go
> -package=mocks localdev/mockexample/validator Validator
> type Validator interface {
> ValidateUser() (*user.Data, error)
> }
> type ValidationRequest struct {
> Command string
> Name string
> Password string
> }
> func (vr ValidationRequest) ValidateUser() (*user.Data, error) {
> if vr.Name == "bob" && vr.Password == "1234" {
> return &user.Data{UserID: "123", UserName:
> "bsmith", FirstName: "Bob", LastName: "Smith"}, nil
> }
> return nil, fmt.Errorf("invalid credentials")
> }
> func NewValidator(name string, password string) Validator {
> return &ValidationRequest{Name: name, Password: password}
> }
> * Contents of user.go
> package user
> type Data struct {
> UserID string `json:"user_id"`
> UserName string `json:"user_name"`
> FirstName string `json:"first_name"`
> LastName string `json:"last_name"`
> }
> * Contents of configure_test.go
> package cmd
> import (
> "localdev/mockexample/mocks"
> "localdev/mockexample/user"
> "os"
> "testing"
>
> "github.com/golang/mock/gomock"
> )
> func TestConfigure(t *testing.T) {
> t.Run("ConfigureWithMock", func(t *testing.T) {
> os.Args[1] = "bob"
> os.Args[2] = "1234"
>
> ctrl := gomock.NewController(t)
> mockValidator :=
> mocks.NewMockValidator(ctrl)
>
> //mockValidator.EXPECT().ValidateUser().AnyTimes() // zero more calls, so
> this will also pass.
> userData := user.Data{UserID: "testId"}
>
> mockValidator.EXPECT().ValidateUser().Return(&userData, nil).Times(1)
> //(gomock.Any(), gomock.Any()) //(&userData, nil)
> Configure()
> })
> }
> Contents of generated mock
> // Code generated by MockGen. DO NOT EDIT.
> // Source: localdev/mockexample/validator (interfaces: Validator)
> // Package mocks is a generated GoMock package.
> package mocks
> import (
> user "localdev/mockexample/user"
> reflect "reflect"
> gomock "github.com/golang/mock/gomock"
> )
> // MockValidator is a mock of Validator interface.
> type MockValidator struct {
> ctrl *gomock.Controller
> recorder *MockValidatorMockRecorder
> }
> // MockValidatorMockRecorder is the mock recorder for MockValidator.
> type MockValidatorMockRecorder struct {
> mock *MockValidator
> }
> // NewMockValidator creates a new mock instance.
> func NewMockValidator(ctrl *gomock.Controller) *MockValidator {
> mock := &MockValidator{ctrl: ctrl}
> mock.recorder = &MockValidatorMockRecorder{mock}
> return mock
> }
> // EXPECT returns an object that allows the caller to indicate expected
> use.
> func (m *MockValidator) EXPECT() *MockValidatorMockRecorder {
> return m.recorder
> }
> // ValidateUser mocks base method.
> func (m *MockValidator) ValidateUser() (*user.Data, error) {
> m.ctrl.T.Helper()
> ret := m.ctrl.Call(m, "ValidateUser")
> ret0, _ := ret[0].(*user.Data)
> ret1, _ := ret[1].(error)
> return ret0, ret1
> }
> // ValidateUser indicates an expected call of ValidateUser.
> func (mr *MockValidatorMockRecorder) ValidateUser() *gomock.Call {
> mr.mock.ctrl.T.Helper()
> return mr.mock.ctrl.RecordCallWithMethodType(mr.mock,
> "ValidateUser", reflect.TypeOf((*MockValidator)(nil).ValidateUser))
> }
>
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