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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