Separate go module for client tests

Will help us drop dependency to github.com/Microsoft/hcsshim/test in the
main go.mod

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

integration/client/content_test.go

@@ -0,0 +1,89 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package containerd
+
+import (
+	"context"
+	"fmt"
+	"sync/atomic"
+	"testing"
+
+	. "github.com/containerd/containerd"
+	"github.com/containerd/containerd/content"
+	"github.com/containerd/containerd/content/testsuite"
+	"github.com/containerd/containerd/errdefs"
+	"github.com/containerd/containerd/namespaces"
+	"github.com/pkg/errors"
+)
+
+func newContentStore(ctx context.Context, root string) (context.Context, content.Store, func() error, error) {
+	client, err := New(address)
+	if err != nil {
+		return nil, nil, nil, err
+	}
+
+	var (
+		count uint64
+		cs    = client.ContentStore()
+		name  = testsuite.Name(ctx)
+	)
+
+	wrap := func(ctx context.Context) (context.Context, func(context.Context) error, error) {
+		n := atomic.AddUint64(&count, 1)
+		ctx = namespaces.WithNamespace(ctx, fmt.Sprintf("%s-n%d", name, n))
+		return client.WithLease(ctx)
+	}
+
+	ctx = testsuite.SetContextWrapper(ctx, wrap)
+
+	return ctx, cs, func() error {
+		for i := uint64(1); i <= count; i++ {
+			ctx = namespaces.WithNamespace(ctx, fmt.Sprintf("%s-n%d", name, i))
+			statuses, err := cs.ListStatuses(ctx)
+			if err != nil {
+				return err
+			}
+			for _, st := range statuses {
+				if err := cs.Abort(ctx, st.Ref); err != nil && !errdefs.IsNotFound(err) {
+					return errors.Wrapf(err, "failed to abort %s", st.Ref)
+				}
+			}
+			err = cs.Walk(ctx, func(info content.Info) error {
+				if err := cs.Delete(ctx, info.Digest); err != nil {
+					if errdefs.IsNotFound(err) {
+						return nil
+					}
+
+					return err
+				}
+				return nil
+			})
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+
+	}, nil
+}
+
+func TestContentClient(t *testing.T) {
+	if testing.Short() {
+		t.Skip()
+	}
+	testsuite.ContentSuite(t, "ContentClient", newContentStore)
+}