Initial commit for mocking

* cannot yet mock higher-level wrappers, like `*AndWait` because of generics are not yet supported by gomock (even in v1.7.0-rc.1)

examples/mocking/dbfs_test.go

@@ -0,0 +1,42 @@
+package sample
+
+import (
+	"context"
+	"sample/mocks"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	_ "github.com/golang/mock/mockgen/model"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/databricks/databricks-sdk-go/service/dbfs"
+	"github.com/databricks/databricks-sdk-go/workspaces"
+)
+
+//go:generate mockgen -package=mocks -destination=mocks/dbfs.go github.com/databricks/databricks-sdk-go/service/dbfs DbfsService
+
+func TestClusters(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	m := mocks.New MockDbfsService(ctrl)
+
+	ctx := context.Background()
+	m.EXPECT().
+		Create(gomock.Any(), gomock.Any()).
+		DoAndReturn(func(_, _ any) (*dbfs.CreateResponse, error) {
+			return &dbfs.CreateResponse{
+				Handle: 123,
+			}, nil
+		})
+
+	w := workspaces.New()
+	w.Dbfs = m
+
+	h, err := w.Dbfs.Create(ctx, dbfs.Create{
+		Path: "/a/b/c",
+	})
+	assert.NoError(t, err)
+
+	assert.Equal(t, int64(123), h.Handle)
+}

examples/mocking/go.mod

@@ -0,0 +1,34 @@
+module sample
+
+go 1.18
+
+require (
+	github.com/databricks/databricks-sdk-go v0.0.0
+	github.com/golang/mock v1.6.0
+	github.com/stretchr/testify v1.8.1
+)
+
+require (
+	cloud.google.com/go/compute v1.6.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/go-querystring v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	go.opencensus.io v0.23.0 // indirect
+	golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3 // indirect
+	golang.org/x/net v0.0.0-20220526153639-5463443f8c37 // indirect
+	golang.org/x/oauth2 v0.0.0-20220628200809-02e64fa58f26 // indirect
+	golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/time v0.0.0-20210723032227-1f47c861a9ac // indirect
+	google.golang.org/api v0.82.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20220527130721-00d5c0f3be58 // indirect
+	google.golang.org/grpc v1.46.2 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+	gopkg.in/ini.v1 v1.66.6 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
+
+replace github.com/databricks/databricks-sdk-go v0.0.0 => ../..