Check mock

checkers/checkers.go

@@ -3,6 +3,7 @@ package checkers
 import (
 	"context"
 	"encoding/json"
+	"sync"
 
 	"github.com/pkg/errors"
 )
@@ -11,9 +12,15 @@ type Checker interface {
 	Check(ctx context.Context) error
 }
 
-var registry = map[string]func(in json.RawMessage) (Checker, error){}
+var (
+	registry      = map[string]func(in json.RawMessage) (Checker, error){}
+	registryMutex = &sync.RWMutex{}
+)
 
 func NewCheckerByKind(kind string, spec json.RawMessage) (Checker, error) {
+	registryMutex.RLock()
+	defer registryMutex.RUnlock()
+
 	c, ok := registry[kind]
 	if !ok {
 		return nil, errors.Errorf("checker with kind `%s` is not registered", kind)
@@ -23,6 +30,9 @@ func NewCheckerByKind(kind string, spec json.RawMessage) (Checker, error) {
 }
 
 func Register(kind string, fn func(in json.RawMessage) (Checker, error)) error {
+	registryMutex.Lock()
+	defer registryMutex.Unlock()
+
 	if _, ok := registry[kind]; ok {
 		return errors.Errorf("checker with kind `%s` already registered", kind)
 	}

checkers/mock.go

@@ -0,0 +1,22 @@
+package checkers
+
+import (
+	"context"
+
+	"github.com/stretchr/testify/mock"
+)
+
+var _ Checker = (*Mock)(nil)
+
+type Mock struct {
+	mock.Mock
+}
+
+func NewMock() *Mock {
+	return &Mock{}
+}
+
+func (m *Mock) Check(context.Context) error {
+	args := m.Called()
+	return args.Error(0)
+}