Allow test runners to wrap contexts

Let the test runners choose the namespaces and
wrap the contexts. This allows the test suite to create
multiple contexts without worrying about namespacing
or leasing in the contexts.

Signed-off-by: Derek McGowan <derek@mcgstyle.net>

metadata/content_test.go

@@ -3,7 +3,9 @@ package metadata
 import (
 	"bytes"
 	"context"
+	"fmt"
 	"path/filepath"
+	"sync/atomic"
 	"testing"
 
 	"github.com/boltdb/bolt"
@@ -29,6 +31,16 @@ func createContentStore(ctx context.Context, root string) (context.Context, cont
 		return nil, nil, nil, err
 	}
 
+	var (
+		count uint64
+		name  = testsuite.Name(ctx)
+	)
+	wrap := func(ctx context.Context) (context.Context, func() error, error) {
+		n := atomic.AddUint64(&count, 1)
+		return namespaces.WithNamespace(ctx, fmt.Sprintf("%s-n%d", name, n)), func() error { return nil }, nil
+	}
+	ctx = testsuite.SetContextWrapper(ctx, wrap)
+
 	return ctx, NewDB(db, cs, nil).ContentStore(), func() error {
 		return db.Close()
 	}, nil