Making Workflow and Activity registration optional when they are mocked (#1256)

Co-authored-by: agautam478 <72432016+agautam478@users.noreply.github.com>

Author: edmondop

internal/workflow_testsuite.go

@@ -240,8 +240,8 @@ func (t *TestWorkflowEnvironment) OnActivity(activity interface{}, args ...inter
 			panic(err)
 		}
 		fnName := getActivityFunctionName(t.impl.registry, activity)
+		t.impl.registry.RegisterActivityWithOptions(activity, RegisterActivityOptions{DisableAlreadyRegisteredCheck: true})
 		call = t.Mock.On(fnName, args...)
-
 	case reflect.String:
 		call = t.Mock.On(activity.(string), args...)
 	default:
@@ -289,11 +289,12 @@ func (t *TestWorkflowEnvironment) OnWorkflow(workflow interface{}, args ...inter
 		if alias, ok := t.impl.registry.getWorkflowAlias(fnName); ok {
 			fnName = alias
 		}
+		t.impl.registry.RegisterWorkflowWithOptions(workflow, RegisterWorkflowOptions{DisableAlreadyRegisteredCheck: true})
 		call = t.Mock.On(fnName, args...)
 	case reflect.String:
 		call = t.Mock.On(workflow.(string), args...)
 	default:
-		panic("activity must be function or string")
+		panic("workflow must be function or string")
 	}
 
 	return t.wrapCall(call)

internal/workflow_testsuite_test.go

@@ -23,6 +23,7 @@ package internal
 
 import (
 	"context"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/suite"
 	"strings"
 	"testing"
@@ -129,6 +130,53 @@ func TestWorkflowReturnNil(t *testing.T) {
 	require.NoError(t, err)
 }
 
+func HelloWorkflow(ctx Context, name string) (string, error) {
+	ctx = WithActivityOptions(ctx, ActivityOptions{
+		ScheduleToCloseTimeout: time.Hour,
+		StartToCloseTimeout:    time.Hour,
+		ScheduleToStartTimeout: time.Hour,
+	})
+	var result string
+	err := ExecuteActivity(ctx, HelloActivity, name).Get(ctx, &result)
+	return result, err
+}
+
+func HelloActivity(ctx context.Context, name string) (string, error) {
+	return "Hello " + name + "!", nil
+}
+
+func TestWorkflowMockingWithoutRegistration(t *testing.T) {
+	testSuite := &WorkflowTestSuite{}
+	env := testSuite.NewTestWorkflowEnvironment()
+	env.OnWorkflow(HelloWorkflow, mock.Anything, mock.Anything).Return(
+		func(ctx Context, person string) (string, error) {
+			return "Hello " + person + "!", nil
+		})
+	// Workflow is mocked, no activity registration required
+	env.ExecuteWorkflow(HelloWorkflow, "Cadence")
+	require.NoError(t, env.GetWorkflowError())
+	var result string
+	err := env.GetWorkflowResult(&result)
+	require.NoError(t, err)
+	require.Equal(t, "Hello Cadence!", result)
+}
+
+func TestActivityMockingWithoutRegistration(t *testing.T) {
+	testSuite := &WorkflowTestSuite{}
+	env := testSuite.NewTestWorkflowEnvironment()
+	env.OnActivity(HelloActivity, mock.Anything, mock.Anything).Return(
+		func(ctx context.Context, person string) (string, error) {
+			return "Goodbye " + person + "!", nil
+		})
+	// Registration of activity not required
+	env.RegisterWorkflow(HelloWorkflow)
+	env.ExecuteWorkflow(HelloWorkflow, "Cadence")
+	require.NoError(t, env.GetWorkflowError())
+	var result string
+	err := env.GetWorkflowResult(&result)
+	require.NoError(t, err)
+	require.Equal(t, "Goodbye Cadence!", result)
+  
 type InterceptorTestSuite struct {
 	suite.Suite
 	WorkflowTestSuite