feat(lib/store): add bbolt store implementation

Signed-off-by: Xe Iaso <me@xeiaso.net>

lib/store/bbolt/factory_test.go

@@ -0,0 +1,50 @@
+package bbolt
+
+import (
+	"encoding/json"
+	"errors"
+	"path/filepath"
+	"testing"
+)
+
+func TestFactoryValid(t *testing.T) {
+	f := Factory{}
+
+	t.Run("bad config", func(t *testing.T) {
+		if err := f.Valid(json.RawMessage(`}`)); err == nil {
+			t.Error("wanted parsing failure but got a successful result")
+		}
+	})
+
+	t.Run("invalid config", func(t *testing.T) {
+		for _, tt := range []struct {
+			name string
+			cfg  Config
+			err  error
+		}{
+			{
+				name: "missing path",
+				cfg:  Config{},
+				err:  ErrMissingPath,
+			},
+			{
+				name: "unwritable folder",
+				cfg: Config{
+					Path: filepath.Join("/", "testdb"),
+				},
+				err: ErrCantWriteToPath,
+			},
+		} {
+			t.Run(tt.name, func(t *testing.T) {
+				data, err := json.Marshal(tt.cfg)
+				if err != nil {
+					t.Fatal(err)
+				}
+
+				if err := f.Valid(json.RawMessage(data)); !errors.Is(err, tt.err) {
+					t.Error(err)
+				}
+			})
+		}
+	})
+}