diff --git a/fake/cosi.pb.go b/fake/cosi.pb.go
new file mode 100644
index 0000000..b0487a9
--- /dev/null
+++ b/fake/cosi.pb.go
@@ -0,0 +1,46 @@
+package fake
+
+import (
+	"context"
+
+	cosi "github.com/kubernetes-sigs/container-object-storage-interface-spec"
+
+	"google.golang.org/grpc"
+)
+
+// this ensures that the mock implements the client interface
+var _ cosi.ProvisionerClient = (*MockProvisionerClient)(nil)
+
+// MockProvisionerClient is a type that implements all the methods for RolePolicyAttachmentClient interface
+type MockProvisionerClient struct {
+	GetInfo            func(ctx context.Context, in *cosi.ProvisionerGetInfoRequest, opts ...grpc.CallOption) (*cosi.ProvisionerGetInfoResponse, error)
+	CreateBucket       func(ctx context.Context, in *cosi.ProvisionerCreateBucketRequest, opts ...grpc.CallOption) (*cosi.ProvisionerCreateBucketResponse, error)
+	DeleteBucket       func(ctx context.Context, in *cosi.ProvisionerDeleteBucketRequest, opts ...grpc.CallOption) (*cosi.ProvisionerDeleteBucketResponse, error)
+	GrantBucketAccess  func(ctx context.Context, in *cosi.ProvisionerGrantBucketAccessRequest, opts ...grpc.CallOption) (*cosi.ProvisionerGrantBucketAccessResponse, error)
+	RevokeBucketAccess func(ctx context.Context, in *cosi.ProvisionerRevokeBucketAccessRequest, opts ...grpc.CallOption) (*cosi.ProvisionerRevokeBucketAccessResponse, error)
+}
+
+// ProvisionerCreateBucket mocks GetBucketPolicyRequest method
+func (m *MockProvisionerClient) ProvisionerCreateBucket(ctx context.Context, in *cosi.ProvisionerCreateBucketRequest, opts ...grpc.CallOption) (*cosi.ProvisionerCreateBucketResponse, error) {
+	return m.CreateBucket(ctx, in, opts...)
+}
+
+// ProvisionerDeleteBucket mocks PutBucketPolicyRequest method
+func (m *MockProvisionerClient) ProvisionerDeleteBucket(ctx context.Context, in *cosi.ProvisionerDeleteBucketRequest, opts ...grpc.CallOption) (*cosi.ProvisionerDeleteBucketResponse, error) {
+	return m.DeleteBucket(ctx, in, opts...)
+}
+
+// ProvisionerGrantBucketAccess mocks DeleteBucketPolicyRequest method
+func (m *MockProvisionerClient) ProvisionerGrantBucketAccess(ctx context.Context, in *cosi.ProvisionerGrantBucketAccessRequest, opts ...grpc.CallOption) (*cosi.ProvisionerGrantBucketAccessResponse, error) {
+	return m.GrantBucketAccess(ctx, in, opts...)
+}
+
+// ProvisionerRevokeBucketAccess mocks DeleteBucketPolicyRequest method
+func (m *MockProvisionerClient) ProvisionerRevokeBucketAccess(ctx context.Context, in *cosi.ProvisionerRevokeBucketAccessRequest, opts ...grpc.CallOption) (*cosi.ProvisionerRevokeBucketAccessResponse, error) {
+	return m.RevokeBucketAccess(ctx, in, opts...)
+}
+
+// ProvisionerRevokeBucketAccess mocks DeleteBucketPolicyRequest method
+func (m *MockProvisionerClient) ProvisionerGetInfo(ctx context.Context, in *cosi.ProvisionerGetInfoRequest, opts ...grpc.CallOption) (*cosi.ProvisionerGetInfoResponse, error) {
+	return m.GetInfo(ctx, in, opts...)
+}